Deck 1: Introduction to Data Communications

Question 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.

Answer 1

False

Question 2

An intranet is a LAN that uses Internet technologies and is publicly available to people outside of the organization.

Answer 2

False

Question 3

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.

Answer 3

False

Question 4

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 5

Ethernet is an example of a network layer protocol.

Question 6

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 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.

Question 8

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 9

According to John Chambers, CEO of Cisco a leading networking technology company), the information age is the second Industrial Revolution.

Question 10

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 11

ANSI is a voting participant in the ISO.

Question 12

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 13

The specification stage of the de jure standardization process consists of developing nomenclature and identifying the problems to be addressed.

Question 14

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 15

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 16

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 17

Data communication standards enable each layer in the sending computer to communicate with its corresponding layer in the receiving computer.

Question 18

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 19

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 20

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 21

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 22

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 23

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 24

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 25

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 26

The ____________ layer of the OSI model is responsible for data format translation.

A)session
B)presentation
C)physical
D)application
E)transport

Question 27

The fourth layer of the OSI model is called the __________ layer.

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

Question 28

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 29

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 30

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 31

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 32

___________ 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 33

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 34

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)specification
C)protocol
D)regulation
E)policy

Question 35

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 36

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 through it.

Question 37

In which layer of the Internet model would the HTTP protocol be used?

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

Question 38

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 39

Which of the following would be a standard or protocol used at the Data Link layer of the Internet or OSI model?

A)IP
B)TCP
C)Ethernet
D)HTTP
E)FTP

Question 40

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 information such 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 41

Which of the following is not an important future trend in communication and networking?

A)development of online batch systems
B)massively online systems
C)the Internet of Things
D)Wireless LAN
E)BYOD

Question 42

The Internet standards organization that will allow anyone to join is __________________.

A)ANSI
B)ISO
C)IETF
D)IEEE
E)ITU-T

Question 43

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 44

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 45

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 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

Question 47

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 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

Question 49

Which of the following is not a data link layer standard?

A)HTTP
B)Ethernet
C)T1
D)PPP
E)Frame Relay

Question 50

A MOOC is an example of an)

A)BYOD
B)massively online technology
C)native app
D)browser-based technology

Question 51

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 52

BYOD stands for

A)Bring Your Own Device
B)Bring Your Own Database
C)Build Your Own Device
D)Build Your Own Database

Question 53

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 54

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 55

__________ ensure that hardware and software produced by different vendors work together.

A)Delimiters
B)Standards
C)ASPs
D)RBOCs
E)Intranets

Question 56

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 57

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 58

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 59

Taken together, the physical and data link layers are called the ____________________.

A)Internet layer
B)Hardware layer
C)Internetwork layer
D)Application layer

Question 60

Which of the following is not an application layer standard?

A)HTTP
B)POP
C)T1
D)IMAP
E)HTML

Question 61

Why are standards important?

Question 62

Describe the address naming structure of computers on the Internet.

Question 63

When a developer creates an application for each type of device that might be used, this is referred to as

A)a browser-based approach
B)a native app
C)Internet Explorer
D)BYOD

Question 64

What are the three basic hardware components for a data communication network? Describe the functions of these.

Question 65

The _______ is a connection of computers and networks built into common, everyday devices.

A)BYOD
B)Internet of Things
C)Web of lies
D)Wide Area Network

Question 66

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 67

Compare and contrast a backbone network BN), a LAN, and a WAN.Do most organizations build WANs?

Question 68

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 69

How are Internet standards developed? What is a de facto standard?

Question 70

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 71

How can data communications networks affect businesses?

Question 72

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 73

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 74

Describe two important data communications standards-making bodies.How do they differ?

Question 75

What is the difference between an extranet and intranet?

Question 76

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 77

How do LANs differ from WANs, and BNs?

Question 78

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

Question 79

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 80

What is VOIP? What are some examples of companies that provide VOIP as a service to their customers?