Deck 9: Network Organization Concepts

Question 1

In the routing information protocol (RIP),the entire routing table is updated only when changes have occurred;this decreases internetwork traffic and positively affects the delivery of messages.

Answer 1

False

Question 2

A router is an internetworking device,primarily software driven,which directs traffic between two different types of LANs or two network segments with different protocol addresses.

Answer 2

True

Question 3

Circuit switching is a communication model in which a dedicated communication path is established between two hosts.

Answer 3

True

Question 4

Typically,a host at one site,called the client,has resources that a host at another site,called the server,wants to use.

Question 5

A local area network (LAN)is generally owned,used,and operated by a single organization and allows computers to communicate directly through a common communication line.

Question 6

In a bus network topology,devices are physically connected by means of cables that run between them,and the cables pass through a centralized controller mechanism called the bus.

Question 7

Round robin access control is an inefficient technique when there are many nodes transmitting over long periods of time.

Question 8

The objective of a hybrid configuration is to select among the strong points of each topology and combine them to meet that system's communications requirements most effectively.

Question 9

Addressing protocols are normally unrelated to the network topology and geographic location of each site.

Question 10

Token passing networks generally use either collision detection or collision avoidance techniques to deal with potential collisions.

Question 11

The physical topology of a network may not reflect its logical topology.

Question 12

When using the distributed-queue,dual bus (DQDB)protocol,transmission on each bus consists of a steady stream of fixed-size slots.

Question 13

Star topology permits easy routing because a central station knows the path to all other sites.

Question 14

Bridging between two homogeneous networks occurs at Layer 2 of the OSI transport protocol model,the data link layer.

Question 15

Ethernet is the most widely known CSMA/CD protocol.

Question 16

The tree topology is a collection of rings.

Question 17

The Transmission Control Protocol/Internet Protocol (TCP/IP)reference model is the basis for Internet communications and is the most widely used network layer protocol today.

Question 18

In a single loop ring topology network,each data packet is passed from node to node in both directions,and the destination station copies the data into a local buffer.

Question 19

A common goal of all networked systems is to provide a convenient way to share resources while controlling users' access to them.

Question 20

In the virtual circuit approach to data transmission,the destination and packet sequence number are added to the information identifying the packet's message.

Question 21

In the ____ topology,all sites are connected to a single communication line running the length of the network.

A) bus
B) ring
C) star
D) gateway

Question 22

A ____ includes information technology that operates within a radius of approximately 10 meters of an individual and is centered around that one person.

A) PAN
B) MAN
C) WAN
D) LAN

Question 23

Under the Domain Name Service (DNS)protocol,in the address [e-mail]4,the host name is ____.

A) someone
B) name1
C) name2
D) name3

Question 24

In the ____ path-selection approach,the destination and sequence number of a packet are added to the information uniquely identifying the message to which the packet belongs;each packet is then handled independently and a route is selected as each packet is accepted into the network.

A) physical circuit
B) datagram
C) telegram
D) virtual circuit

Question 25

In the OSI transport protocol model,Layer Seven,the ____ layer,provides the interface to users and is responsible for formatting user data before passing it to lower layers for transmission to a remote host.

A) physical
B) network
C) presentation
D) application

Question 26

Usually,the term "____" indicates a specific computer system whose services and resources can be used from remote locations.

A) site
B) host
C) node
D) remote

Question 27

If a collision occurs when using CSMA/CD,a jamming signal is sent immediately to both sending nodes,which then wait ____ before trying again.

A) one millisecond
B) one second
C) one minute
D) a random period

Question 28

When using the routing information protocol (RIP)to transfer data from one network to another,the path ____ is chosen.

A) with the fastest server
B) that is most secure
C) with the shortest response time
D) with the smallest number of hops

Question 29

Which characteristic is true of packet switching?

A) Preferred in low volume networks
B) Easily overloaded
C) Preferred for voice communications
D) Transmits in batches

Question 30

Carrier sense multiple access (CSMA)is a ____-based access protocol.

A) round robin
B) reservation
C) contention
D) detection

Question 31

In the distributed-queue,dual bus (DQDB)protocol,a node can use Bus 2 to send a ____ to its upstream neighbors.

A) reservation
B) message
C) free slot
D) token

Question 32

The maximum circumference for a MAN is ____.

A) 10 miles
B) 50 kilometers
C) 100 kilometers
D) 200 miles

Question 33

A ____ is a device and software used to connect two or more local area networks or systems that use different protocols;it translates one network's protocol into another,resolving hardware and software incompatibilities.

A) router
B) gateway
C) bridge
D) tree

Question 34

The ___,which makes technical recommendations about data communication interfaces,took on the task of creating a universal network architecture,resulting in the OSI Reference Model.

A) IEEE 802 Committee
B) High-Level Data Link Organization
C) International Organization for Standardization
D) Transmission Control and Internet Committee

Question 35

When deciding which network topology configuration to use,designers should keep in mind four criteria: ____.

A) equipment cost,time to implement,reliability,and scalability
B) equipment cost,time to implement,throughput,and security
C) basic cost,communications cost,reliability,and user's environment
D) basic cost,scalability,reliability,and user's environment

Question 36

The TCP/IP reference model has ____ layers that roughly correlate to the OSI's seven layers.

A) two
B) four
C) seven
D) ten

Question 37

____ is an example of a circuit-switched network.

A) A telephone system
B) The Internet
C) The United States Postal Service
D) A local area network

Question 38

When using a ring topology,a ____ can be used to connect to another network that uses the same protocol.

A) star
B) central controller
C) router
D) bridge

Question 39

In the ____ topology configuration,hosts are connected to each other through a central controller which assumes all responsibility for routing messages to the appropriate host.

A) bus
B) spiral
C) ring
D) star

Question 40

The geometric arrangement of connections (cables,wireless,or both)that link the nodes in a networked system is called a ____.

A) layout
B) topology
C) map
D) physical network