Deck 1: Introduction to Data Communications

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Question
The OSI model is currently the most widely implemented network model used to develop and build networks of any size, including the Internet itself.
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Question
Data communication standards enable each layer in the sending computer to communicate with its corresponding layer in the receiving computer.
Question
At the transport layer in the Internet model, TCP is responsible for breaking large files received from the application layer into smaller messages and opening a connection to a server for transferringthem.
Question
Due to advances in high speed communication networks, the information lag, or the time it takes for information to be disseminated around the world, has been significantly shortened.
Question
The function of the file server is to :

A)store data and software programs that can be used by client computers on the network.
B)manage all printing requests from clients on the network.
C)transfer e-mail messages to other servers on the network.
D)store HTML documents for an Internet or intranet web site.
E)coordinate the communication of client and servers on the network.
Question
Which of the following is not true about a server?

A)stores data and software that can be accessed by the client.
B)may be a personal computer or a mainframe on the network.
C)in client/server computing they work together over the network with client computers to support the business application.
D)can only perform one function on a network.
E)stores documents and graphics that can be accessed from any Web browser.
Question
A local area network LAN) connects other LANs and backbone networks BNs) located in different areas to each other and to wide area networks in a span from 3 to 30 miles.
Question
It is not uncommon for companies to end up spending more money on network management and security tasks than they do on the actual computer equipment itself.
Question
In the OSI model, the application layer provides a set of utilities for applications and is the end user's access to the network.
Question
Networks that are designed to connect similar computers that share data and software with each other are called:

A)client/server networks
B)peer-to-peer networks
C)host networks
D)client networks
E)local area networks
Question
The application layer is the seventh layer of the Internet model and specifies the type of connection and the electrical signals that pass through it.
Question
Telecommunications is the transmission of voice and video as well as data and usually implies transmitting a longer distance than in a data communication network.
Question
The network layer performs the same functions in both the OSI and Internet models and is responsible for routing messages from the source computer to the destination computer.
Question
The specification stage of the de jure standardization process consists of developing nomenclature and identifying the problems to be addressed.
Question
Ethernet is an example of a network layer protocol.
Question
An intranet is a LAN that uses Internet technologies and is publicly available to people outside of the organization.
Question
According to John Chambers, CEO of Cisco a leading networking technology company), the information age is the second Industrial Revolution.
Question
A car manufacturer may give access to certain portions of its network to some of its suppliers via the Internet.This is an example of an extranet.
Question
ANSI is a voting participant in the ISO.
Question
Data communications and networking can be considered as a global area of study because:

A)new technologies and applications emerge from a variety of countries and spread around the world
B)the technologies enable global communication
C)the political and regulatory issues are exactly the same in every country
D)a and b
E)none of the above
Question
An) _____________ is a set of rules that determine what a layer would do and provides a clearly defined set of messages that software at the layer needs to understand.

A)agreement
B)standard
C)protocol
D)regulations
E)policy
Question
The _________ layer performs error checking which is redundant to some extent with the function of the _________ layer.

A)application, presentation
B)physical, data link
C)transport, data link
D)presentation, transport
E)network, physical
Question
___________ is an orderly close to a dialogue between end users.

A)Session termination
B)Physical bits
C)Frame overhead
D)Packet encapsulation
E)Message encryption
Question
The ____________ layer of the OSI model is responsible for data format translation.

A)session
B)presentation
C)physical
D)application
E)transport
Question
Which is not a function of the physical layer:

A)transmission of bits.
B)defining the rules by which one and zeroes are transmitted.
C)providing error-free transmission of data.
D)providing the physical connection between sender and receiver.
E)specifying the type of connection and type of signals, waves or pulses that pass though it.
Question
The _________ layer is responsible for routing of messages from the sender to the final destination.

A)data communication layer
B)resident layer
C)application layer
D)network layer
E)physical layer
Question
Which of the following would be a standard used at the Data Link layer of the Internet or OSI model?

A)IP
B)TCP
C)Ethernet
D)HTTP
E)FTP
Question
A local area network is:

A)a large central network that connects other networks in a distance spanning exactly 5 miles.
B)a group of personal computers or terminals located in the same general area and connected by a common cable communication circuit) so they can exchange informationsuch as a set of rooms, a single building, or a set of well-connected buildings.
C)a network spanning a geographical area that usually encompasses a city or county area 3 to 30 miles).
D)a network spanning a large geographical area up to 1000s of miles).
E)a network spanning exactly 10 miles with common carrier circuits.
Question
In the Internet model, the application layer corresponds to the ________ layers) of the OSI model.

A)data link and network
B)session, presentation and application
C)application layer
D)application and presentation
E)network, transport and presentation
Question
An) _________ is a LAN that uses the same technologies as the Internet but is open to only those inside the organization.

A)WAN
B)BN
C)extranet
D)intranet
E)MAN
Question
An) _________ is a LAN that uses the same technologies as the Internet but is provided to invited users outside the organization who access it over the Internet.

A)WAN
B)BN
C)extranet
D)intranet
E)MAN
Question
In which layer of the Internet model would the HTTP standard be used?

A)physical
B)application
C)transport
D)network
E)data link
Question
Which of the following is not a property of a WAN:

A)connects backbone networks and MANS.
B)spans hundreds or thousands of miles
C)provides data transmission speeds from 56Kbps to 10Gbps.
D)connects a group of computers in a small geographic area such as room, floor, building or campus.
E)uses leased lines from IXCs like ATT, MCI, and Sprint.
Question
Which layer of the OSI model is responsible for ensuring that all packets sent are received by the destination station by dealing with end-to-end issues?

A)presentation
B)transport
C)physical
D)session
E)application
Question
Which of the following is a function of the transport layer?

A)linking the physical layer to the network layer
B)formatting messages by indicating where they start and end
C)deciding which route the message should take
D)breaking long messages into several smaller messages
E)specifying the type of connection and the electrical signals, radio waves, or light pulses that pass through it
Question
A backbone network is:

A)a high speed central network that connects other networks in a distance spanning up to several miles.
B)a group of personal computers or terminals located in the same general area and connected by a common cable communication circuit) so they can exchange information.
C)a network spanning a geographical area that usually encompasses a city or county area 3 to 30 miles).
D)a network spanning a large geographical area up to 1000s of miles).
E)a network spanning exactly 200 miles with common carrier circuits.
Question
Which of the following is a term used to group together the physical and data link layers?

A)Internetwork layers
B)Hardware layers
C)Software layers
D)Middleware layers
E)Application layers
Question
The fourth layer of the OSI model is called the __________ layer.

A)network
B)transport
C)session
D)data link
E)presentation
Question
Which layer of the OSI model is responsible for ensuring flow control so that the destination station does not receive more packets that it can process at any given time?

A)presentation
B)transport
C)physical
D)session
E)application
Question
Which of the following is not a function of the data link layer?

A)deciding when to transmit messages over the media
B)formatting the message by indicating where messages start and end, and which part is the address
C)detecting and correcting any errors that have occurred in the transmission of the message
D)specifying the type of connection, and the electrical signals, radio waves, or light pulses that pass through it
E)controlling the physical layer by determining when to transmit
Question
Taken together, the physical and data link layers are called the ____________________.

A)Internet layer
B)Hardware layer
C)Internetwork layer
D)Application layer
Question
Which of the following is not an important future trend in communication and networking?

A)development of online batch systems
B)integration of voice, video, and data
C)pervasive networking
D)provision of new information services on rapidly expanding networks
E)development of extremely high speed broadband networks
Question
An) ___________ is similar to an intranet in that it uses Internet technologies, but is developed for users outside the organization.

A)intranet
B)Usenet
C)Wide Area Network
D)extranet
Question
Which of the following is not true about ITU-T:

A)It is the technical standards-setting organization of the United Nations International Telecommunications Union
B)It is the International Telecommunications Union - Telecommunications Group
C)Its membership is limited to U.S.telephone companies
D)It is based in Geneva, Switzerland
E)Its membership is comprised of representatives from over 200 member countries
Question
Which of the following is not an application layer standard?

A)HTTP
B)POP
C)T1
D)IMAP
E)HTML
Question
The primary reason for networking standards is to:

A)simplify cost accounting for networks
B)ensure that hardware and software produced by different vendors can work together
C)make it more difficult to develop hardware and software that link different networks
D)ensure that all network components of a particular network can be provided by only one vendor
E)lock customers into buying network components from one vendor
Question
A _____________ is the input-output hardware device at the end user's end of a communication circuit in a client-server network.

A)server
B)circuit
C)client
D)host
Question
When a user accesses an application via a web browser on their mobile device, this is referred to as

A)a browser-based approach
B)a native app
C)Internet Explorer
D)BYOD
Question
The Internet standards organization that will allow anyone to join is __________________.

A)ANSI
B)ISO
C)IETF
D)IEEE
E)ITU-T
Question
Which of the following is not true about de jure standards?

A)They are always developed before de facto standards.
B)One example exists for network layer software IP).
C)They can be developed by an official industry body.
D)They can take several years to develop.
E)They can be developed by a government body.
Question
__________ ensure that hardware and software produced by different vendors work together.

A)Delimiters
B)Standards
C)ASPs
D)RBOCs
E)Intranets
Question
BYOD stands for

A)Bring Your Own Device
B)Bring Your Own Database
C)Build Your Own Device
D)Build Your Own Database
Question
Which of the following is not true about de facto standards?

A)They never evolve into de jure standards.
B)They are those standards that emerge in the marketplace.
C)They tend not to be developed by an official industry or government body.
D)They are generally supported by more than one vendor but de facto standards have no official standing.
E)They tend to emerge based upon the needs/response of the marketplace.
Question
The network layer of the Internet model uses the _____________ protocol to route messages though the network.

A)TCP
B)HTTP
C)FTP
D)SMTP
E)IP
Question
Which of the following is true about ISO:

A)It makes technical recommendations about data communications interfaces
B)Its name stands for International Organization for Standardization
C)It is based in Geneva, Switzerland
D)It is one of the most important standards-making bodies
E)All of the above
Question
A MOOC is an example of an)

A)BYOD
B)massively online technology
C)native app
D)browser-based technology
Question
The three stages of the de jure standardization process are ______________________.

A)specification, identification of choices and acceptance.
B)planning, implementing and acceptance.
C)brainstorming, identification and implementing.
D)specification, formalization, and acceptance.
E)none of the above.
Question
Which standards body is responsible for the development of local area network LAN) standards?

A)ANSI
B)ISO
C)IETF
D)IEEE
E)ITU-T
Question
The American National Standards Institute:

A)is the coordinating organization for the United States' national system of standards
B)is a professional society in the U.S.whose standards committees focus on local area network standards
C)sets the standards that govern how much of the Internet will operate
D)is an agency that develops federal information processing standards for the federal government
E)makes technical recommendations about global telephone rates
Question
Which of the following is not a data link layer standard?

A)HTTP
B)Ethernet
C)T1
D)PPP
E)Frame Relay
Question
From your own knowledge or background, discuss and describe three important applications of data communications networks for strategic, competitive advantage in business use.Give examples of three real world firms who have used networks for competitive advantage in the marketplace and discuss why these networks contributed to their expertise or competitive advantage.
Question
How are Internet standards developed? What is a de facto standard?
Question
A network administrator has received several reports from users of the network that the intranet website on one of company servers is not accessible, but the same users are still able to retrieve their email being stored on the same server.What layer of the Internet model does this problem appear to reside at?

A)physical
B)transport
C)network
D)application
E)data link
Question
How can data communications networks affect businesses?
Question
Explain why it is such a great time to be an IT professional.
Question
Why are standards important?
Question
Describe two important data communications standards-making bodies.How do they differ?
Question
What is VOIP? What are some examples of companies that provide VOIP as a service to their customers?
Question
How do LANs differ from WANs, and BNs?
Question
What is the purpose of a data and network communication standard? Give five examples of various standards and describe what that standard is
e.g., RS 232, HTTP, etc.
Question
Describe the address naming structure of computers on the Internet.
Question
What are the seven layers of the OSI model and what does each of these layers do? How does the OSI model compare to the Internet model? What does OSI stand for, and who developed this model?
Question
Discuss three trends in communications and networking.Be sure to give four points for each of these trends, plus two in depth examples in your response.
Question
What is the difference between an extranet and intranet?
Question
A junior network administrator has used the wrong cable type to connect his/her computer to the administrative port on a router and cannot establish a terminal session with the device.What layer of the Internet model does this problem appear to reside at?

A)physical
B)transport
C)network
D)application
E)data link
Question
What are the three basic hardware components for a data communication network? Describe the functions of these.
Question
Draw a diagram of the Internet model and describe what each of the five layers do.Put three examples of standards on each of your layers in the diagram.Do this in detail, explaining how a message is transmitted from one computer to another using this model.
Question
Compare and contrast a backbone network BN), a LAN, and a WAN.Do most organizations build WANs?
Question
Which of the following correctly represents order of the seven layers of the OSI model from layer 1 to layer 7?

A)physical, network, data link, session, transport, application, presentation
B)physical, data link, network, transport, session, application, presentation
C)physical, data link, network, transport, session, presentation, application
D)data link, physical, network, session, transport, application, presentation
E)data link, physical, network, transport, session, presentation, application
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Deck 1: Introduction to Data Communications
1
The OSI model is currently the most widely implemented network model used to develop and build networks of any size, including the Internet itself.
False
2
Data communication standards enable each layer in the sending computer to communicate with its corresponding layer in the receiving computer.
True
3
At the transport layer in the Internet model, TCP is responsible for breaking large files received from the application layer into smaller messages and opening a connection to a server for transferringthem.
True
4
Due to advances in high speed communication networks, the information lag, or the time it takes for information to be disseminated around the world, has been significantly shortened.
Unlock Deck
Unlock for access to all 79 flashcards in this deck.
Unlock Deck
k this deck
5
The function of the file server is to :

A)store data and software programs that can be used by client computers on the network.
B)manage all printing requests from clients on the network.
C)transfer e-mail messages to other servers on the network.
D)store HTML documents for an Internet or intranet web site.
E)coordinate the communication of client and servers on the network.
Unlock Deck
Unlock for access to all 79 flashcards in this deck.
Unlock Deck
k this deck
6
Which of the following is not true about a server?

A)stores data and software that can be accessed by the client.
B)may be a personal computer or a mainframe on the network.
C)in client/server computing they work together over the network with client computers to support the business application.
D)can only perform one function on a network.
E)stores documents and graphics that can be accessed from any Web browser.
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Unlock for access to all 79 flashcards in this deck.
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k this deck
7
A local area network LAN) connects other LANs and backbone networks BNs) located in different areas to each other and to wide area networks in a span from 3 to 30 miles.
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8
It is not uncommon for companies to end up spending more money on network management and security tasks than they do on the actual computer equipment itself.
Unlock Deck
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k this deck
9
In the OSI model, the application layer provides a set of utilities for applications and is the end user's access to the network.
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k this deck
10
Networks that are designed to connect similar computers that share data and software with each other are called:

A)client/server networks
B)peer-to-peer networks
C)host networks
D)client networks
E)local area networks
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11
The application layer is the seventh layer of the Internet model and specifies the type of connection and the electrical signals that pass through it.
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12
Telecommunications is the transmission of voice and video as well as data and usually implies transmitting a longer distance than in a data communication network.
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13
The network layer performs the same functions in both the OSI and Internet models and is responsible for routing messages from the source computer to the destination computer.
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14
The specification stage of the de jure standardization process consists of developing nomenclature and identifying the problems to be addressed.
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15
Ethernet is an example of a network layer protocol.
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16
An intranet is a LAN that uses Internet technologies and is publicly available to people outside of the organization.
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17
According to John Chambers, CEO of Cisco a leading networking technology company), the information age is the second Industrial Revolution.
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18
A car manufacturer may give access to certain portions of its network to some of its suppliers via the Internet.This is an example of an extranet.
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19
ANSI is a voting participant in the ISO.
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20
Data communications and networking can be considered as a global area of study because:

A)new technologies and applications emerge from a variety of countries and spread around the world
B)the technologies enable global communication
C)the political and regulatory issues are exactly the same in every country
D)a and b
E)none of the above
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Unlock for access to all 79 flashcards in this deck.
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k this deck
21
An) _____________ is a set of rules that determine what a layer would do and provides a clearly defined set of messages that software at the layer needs to understand.

A)agreement
B)standard
C)protocol
D)regulations
E)policy
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22
The _________ layer performs error checking which is redundant to some extent with the function of the _________ layer.

A)application, presentation
B)physical, data link
C)transport, data link
D)presentation, transport
E)network, physical
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23
___________ is an orderly close to a dialogue between end users.

A)Session termination
B)Physical bits
C)Frame overhead
D)Packet encapsulation
E)Message encryption
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24
The ____________ layer of the OSI model is responsible for data format translation.

A)session
B)presentation
C)physical
D)application
E)transport
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25
Which is not a function of the physical layer:

A)transmission of bits.
B)defining the rules by which one and zeroes are transmitted.
C)providing error-free transmission of data.
D)providing the physical connection between sender and receiver.
E)specifying the type of connection and type of signals, waves or pulses that pass though it.
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26
The _________ layer is responsible for routing of messages from the sender to the final destination.

A)data communication layer
B)resident layer
C)application layer
D)network layer
E)physical layer
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27
Which of the following would be a standard used at the Data Link layer of the Internet or OSI model?

A)IP
B)TCP
C)Ethernet
D)HTTP
E)FTP
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28
A local area network is:

A)a large central network that connects other networks in a distance spanning exactly 5 miles.
B)a group of personal computers or terminals located in the same general area and connected by a common cable communication circuit) so they can exchange informationsuch as a set of rooms, a single building, or a set of well-connected buildings.
C)a network spanning a geographical area that usually encompasses a city or county area 3 to 30 miles).
D)a network spanning a large geographical area up to 1000s of miles).
E)a network spanning exactly 10 miles with common carrier circuits.
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29
In the Internet model, the application layer corresponds to the ________ layers) of the OSI model.

A)data link and network
B)session, presentation and application
C)application layer
D)application and presentation
E)network, transport and presentation
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30
An) _________ is a LAN that uses the same technologies as the Internet but is open to only those inside the organization.

A)WAN
B)BN
C)extranet
D)intranet
E)MAN
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31
An) _________ is a LAN that uses the same technologies as the Internet but is provided to invited users outside the organization who access it over the Internet.

A)WAN
B)BN
C)extranet
D)intranet
E)MAN
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32
In which layer of the Internet model would the HTTP standard be used?

A)physical
B)application
C)transport
D)network
E)data link
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33
Which of the following is not a property of a WAN:

A)connects backbone networks and MANS.
B)spans hundreds or thousands of miles
C)provides data transmission speeds from 56Kbps to 10Gbps.
D)connects a group of computers in a small geographic area such as room, floor, building or campus.
E)uses leased lines from IXCs like ATT, MCI, and Sprint.
Unlock Deck
Unlock for access to all 79 flashcards in this deck.
Unlock Deck
k this deck
34
Which layer of the OSI model is responsible for ensuring that all packets sent are received by the destination station by dealing with end-to-end issues?

A)presentation
B)transport
C)physical
D)session
E)application
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35
Which of the following is a function of the transport layer?

A)linking the physical layer to the network layer
B)formatting messages by indicating where they start and end
C)deciding which route the message should take
D)breaking long messages into several smaller messages
E)specifying the type of connection and the electrical signals, radio waves, or light pulses that pass through it
Unlock Deck
Unlock for access to all 79 flashcards in this deck.
Unlock Deck
k this deck
36
A backbone network is:

A)a high speed central network that connects other networks in a distance spanning up to several miles.
B)a group of personal computers or terminals located in the same general area and connected by a common cable communication circuit) so they can exchange information.
C)a network spanning a geographical area that usually encompasses a city or county area 3 to 30 miles).
D)a network spanning a large geographical area up to 1000s of miles).
E)a network spanning exactly 200 miles with common carrier circuits.
Unlock Deck
Unlock for access to all 79 flashcards in this deck.
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37
Which of the following is a term used to group together the physical and data link layers?

A)Internetwork layers
B)Hardware layers
C)Software layers
D)Middleware layers
E)Application layers
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38
The fourth layer of the OSI model is called the __________ layer.

A)network
B)transport
C)session
D)data link
E)presentation
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39
Which layer of the OSI model is responsible for ensuring flow control so that the destination station does not receive more packets that it can process at any given time?

A)presentation
B)transport
C)physical
D)session
E)application
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40
Which of the following is not a function of the data link layer?

A)deciding when to transmit messages over the media
B)formatting the message by indicating where messages start and end, and which part is the address
C)detecting and correcting any errors that have occurred in the transmission of the message
D)specifying the type of connection, and the electrical signals, radio waves, or light pulses that pass through it
E)controlling the physical layer by determining when to transmit
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41
Taken together, the physical and data link layers are called the ____________________.

A)Internet layer
B)Hardware layer
C)Internetwork layer
D)Application layer
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42
Which of the following is not an important future trend in communication and networking?

A)development of online batch systems
B)integration of voice, video, and data
C)pervasive networking
D)provision of new information services on rapidly expanding networks
E)development of extremely high speed broadband networks
Unlock Deck
Unlock for access to all 79 flashcards in this deck.
Unlock Deck
k this deck
43
An) ___________ is similar to an intranet in that it uses Internet technologies, but is developed for users outside the organization.

A)intranet
B)Usenet
C)Wide Area Network
D)extranet
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Unlock for access to all 79 flashcards in this deck.
Unlock Deck
k this deck
44
Which of the following is not true about ITU-T:

A)It is the technical standards-setting organization of the United Nations International Telecommunications Union
B)It is the International Telecommunications Union - Telecommunications Group
C)Its membership is limited to U.S.telephone companies
D)It is based in Geneva, Switzerland
E)Its membership is comprised of representatives from over 200 member countries
Unlock Deck
Unlock for access to all 79 flashcards in this deck.
Unlock Deck
k this deck
45
Which of the following is not an application layer standard?

A)HTTP
B)POP
C)T1
D)IMAP
E)HTML
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46
The primary reason for networking standards is to:

A)simplify cost accounting for networks
B)ensure that hardware and software produced by different vendors can work together
C)make it more difficult to develop hardware and software that link different networks
D)ensure that all network components of a particular network can be provided by only one vendor
E)lock customers into buying network components from one vendor
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47
A _____________ is the input-output hardware device at the end user's end of a communication circuit in a client-server network.

A)server
B)circuit
C)client
D)host
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48
When a user accesses an application via a web browser on their mobile device, this is referred to as

A)a browser-based approach
B)a native app
C)Internet Explorer
D)BYOD
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49
The Internet standards organization that will allow anyone to join is __________________.

A)ANSI
B)ISO
C)IETF
D)IEEE
E)ITU-T
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50
Which of the following is not true about de jure standards?

A)They are always developed before de facto standards.
B)One example exists for network layer software IP).
C)They can be developed by an official industry body.
D)They can take several years to develop.
E)They can be developed by a government body.
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51
__________ ensure that hardware and software produced by different vendors work together.

A)Delimiters
B)Standards
C)ASPs
D)RBOCs
E)Intranets
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52
BYOD stands for

A)Bring Your Own Device
B)Bring Your Own Database
C)Build Your Own Device
D)Build Your Own Database
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53
Which of the following is not true about de facto standards?

A)They never evolve into de jure standards.
B)They are those standards that emerge in the marketplace.
C)They tend not to be developed by an official industry or government body.
D)They are generally supported by more than one vendor but de facto standards have no official standing.
E)They tend to emerge based upon the needs/response of the marketplace.
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54
The network layer of the Internet model uses the _____________ protocol to route messages though the network.

A)TCP
B)HTTP
C)FTP
D)SMTP
E)IP
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55
Which of the following is true about ISO:

A)It makes technical recommendations about data communications interfaces
B)Its name stands for International Organization for Standardization
C)It is based in Geneva, Switzerland
D)It is one of the most important standards-making bodies
E)All of the above
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56
A MOOC is an example of an)

A)BYOD
B)massively online technology
C)native app
D)browser-based technology
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57
The three stages of the de jure standardization process are ______________________.

A)specification, identification of choices and acceptance.
B)planning, implementing and acceptance.
C)brainstorming, identification and implementing.
D)specification, formalization, and acceptance.
E)none of the above.
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58
Which standards body is responsible for the development of local area network LAN) standards?

A)ANSI
B)ISO
C)IETF
D)IEEE
E)ITU-T
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59
The American National Standards Institute:

A)is the coordinating organization for the United States' national system of standards
B)is a professional society in the U.S.whose standards committees focus on local area network standards
C)sets the standards that govern how much of the Internet will operate
D)is an agency that develops federal information processing standards for the federal government
E)makes technical recommendations about global telephone rates
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60
Which of the following is not a data link layer standard?

A)HTTP
B)Ethernet
C)T1
D)PPP
E)Frame Relay
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61
From your own knowledge or background, discuss and describe three important applications of data communications networks for strategic, competitive advantage in business use.Give examples of three real world firms who have used networks for competitive advantage in the marketplace and discuss why these networks contributed to their expertise or competitive advantage.
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62
How are Internet standards developed? What is a de facto standard?
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63
A network administrator has received several reports from users of the network that the intranet website on one of company servers is not accessible, but the same users are still able to retrieve their email being stored on the same server.What layer of the Internet model does this problem appear to reside at?

A)physical
B)transport
C)network
D)application
E)data link
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64
How can data communications networks affect businesses?
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65
Explain why it is such a great time to be an IT professional.
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66
Why are standards important?
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67
Describe two important data communications standards-making bodies.How do they differ?
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68
What is VOIP? What are some examples of companies that provide VOIP as a service to their customers?
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69
How do LANs differ from WANs, and BNs?
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70
What is the purpose of a data and network communication standard? Give five examples of various standards and describe what that standard is
e.g., RS 232, HTTP, etc.
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71
Describe the address naming structure of computers on the Internet.
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72
What are the seven layers of the OSI model and what does each of these layers do? How does the OSI model compare to the Internet model? What does OSI stand for, and who developed this model?
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73
Discuss three trends in communications and networking.Be sure to give four points for each of these trends, plus two in depth examples in your response.
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74
What is the difference between an extranet and intranet?
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75
A junior network administrator has used the wrong cable type to connect his/her computer to the administrative port on a router and cannot establish a terminal session with the device.What layer of the Internet model does this problem appear to reside at?

A)physical
B)transport
C)network
D)application
E)data link
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76
What are the three basic hardware components for a data communication network? Describe the functions of these.
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77
Draw a diagram of the Internet model and describe what each of the five layers do.Put three examples of standards on each of your layers in the diagram.Do this in detail, explaining how a message is transmitted from one computer to another using this model.
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78
Compare and contrast a backbone network BN), a LAN, and a WAN.Do most organizations build WANs?
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79
Which of the following correctly represents order of the seven layers of the OSI model from layer 1 to layer 7?

A)physical, network, data link, session, transport, application, presentation
B)physical, data link, network, transport, session, application, presentation
C)physical, data link, network, transport, session, presentation, application
D)data link, physical, network, session, transport, application, presentation
E)data link, physical, network, transport, session, presentation, application
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