Deck 9: Introduction to Metropolitan Area Networks and Wide Area Networks

Question 1

Many of the same technologies and communications protocols found in local area networks are used to create metropolitan area networks.

Answer 1

True

Question 2

A wide area network would not exist without a sub-network.

Answer 2

True

Question 3

The path in a circuit-switched network exists only in the software.

Answer 3

False

Question 4

Wide area networks share a few characteristics with local area networks.

Question 5

You can assign many meanings to the weights in a weighted network graph.

Question 6

Broadcast networks are as common as circuit-switched and packet-switched networks.

Question 7

To provide a reliable service,the network requires that a logical connection be established between the two endpoints.

Question 8

Circuit-switched networks were designed primarily for voice signals.

Question 9

A wide area network's sub-network,or cloud,may be categorized by the way it transfers information from one end of the sub-network to the other.

Question 10

Wide area networks carry both data and voice.

Question 11

A common example of a connection-oriented network application is DNS.

Question 12

Most MANs are supported by Ethernet ring technology.

Question 13

The sub-network of a wide area network is the logical infrastructure and thus consists of nodes and various types of interconnecting media.

Question 14

LANs cover much greater distances than MANs do.

Question 15

A wide area network's underlying sub-network consists of multiple nodes,each with multiple possible connections to other nodes within the sub-network.

Question 16

Local area network Ethernet allows users to set their own data transfer rates.

Question 17

A virtual circuit breaks a large amount of data into n packets.

Question 18

The underlying sub-network of a connectionless application cannot be a circuit-switched network.

Question 19

Some MAN topologies are based on a ring.

Question 20

SONET was designed to support multiple streams of voice channels.

Question 21

One disadvantage of distributed routing is related to the problems that arise if the routing tables need to be updated.

Question 22

The major disadvantage of flooding is the large number of copied packets distributed throughout the network.

Question 23

The first routing algorithm used within the Internet was called a distance vector routing algorithm.

Question 24

Compared to Dijkstra's least-cost routing algorithm,the flooding technique seems more complex.

Question 25

____ area networks can cover large geographic distances,including the entire Earth.

A) Personal
B) Local
C) Wide
D) Universal

Question 26

Most wide area networks use some form of Dijkstra's algorithm to determine a least-cost route through a network.

Question 27

The SONET network topology is a ____.

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

Question 28

Any network is as strong as its strongest link.

Question 29

When all the routing information is in one place,it is difficult to make updates to the routing information.

Question 30

A feature that is fairly common in ____ is the ability of a user to dynamically allocate more bandwidth on demand.

A) PANs
B) LANs
C) MANs
D) WANs

Question 31

CSMA/CD is the only network technology that successfully supports connection admission control and quality of service.

Question 32

MANs are almost exclusively ____ networks,and thus capable of supporting data rates into the tens of millions and hundreds of millions of bits per second.

A) fiber-optic
B) copper-wired
C) twisted-paired
D) coaxial-cabled

Question 33

Some congestion control methods are based on simple techniques such as the flow control methods.

Question 34

Ciccuit-switched networks will someday replace packet-switched networks.

Question 35

Almost all MANs are based on one of two basic forms of supporting technology: ____ or Ethernet.

A) SONET
B) SOHO
C) GALNET
D) SWNET

Question 36

A network that expands beyond a metropolitan area is a ____ area network.

A) personal
B) local
C) metropolitan
D) wide

Question 37

When a user stores data in "the cloud",the data is stored on the user's premise in what is called a "cloud server".

Question 38

____ are advertised as networks with very low error rates and extremely high throughput.

A) PANs
B) UANs
C) GANs
D) MANs

Question 39

A ____ area network is typically confined to a single building or a couple floors within one building.

A) personal
B) local
C) metropolitan
D) wide

Question 40

SONET rings typically have a failover time of ____ milliseconds.

A) 20
B) 30
C) 40
D) 50

Question 41

A ____ network is the only network that offers a dedicated path.

A) packet-switched
B) broadcast
C) virtual circuit
D) circuit-switched

Question 42

____ is advantageous when a copy of a packet needs to get to all nodes.

A) Flooding
B) Dijkstra's least-cost
C) Dijkstra's shortest-path
D) Dijkstra's maximum-cost

Question 43

A network limit,called the ____,can be placed on how many times any packet is copied.

A) hop limit
B) hop count
C) time to live
D) time to hop

Question 44

A classic algorithm that calculates a least-cost path through a network is ____ algorithm.

A) Dijkstra's maximum-cost
B) Dijkstra's longest-path
C) Turing's longest-path
D) Dijkstra's least-cost

Question 45

A wide area network connects its workstations through the use of a ____ design and requires routing to transfer data across the network.

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

Question 46

____ applications do not negotiate a connection,and the transfer of data is rarely,if ever,acknowledged.

A) FTP
B) Connectionless
C) Connection-oriented
D) Reliable service

Question 47

All wide area networks are collections of at least two basic types of equipment: a station and a ____.

A) link
B) server
C) workstation
D) node

Question 48

The three basic types of subnetworks are ____,packet-switched,and broadcast.

A) multicast
B) protocol-switched
C) circuit-switched
D) unicast

Question 49

A local area network works as a ____ network in that clusters of workstations are connected to a central point (hub or switch)through which workstations can transmit messages to one another.

A) star-based
B) bus-based
C) ring-based
D) star-ring-based

Question 50

A network that is connected in a ____ is one in which neighbors are connected only to neighbors.

A) star
B) mesh
C) bus
D) star-bus

Question 51

The type and number of interconnections between nodes and the way network data is passed from node to node are the responsibility of the ____.

A) sub-network
B) station
C) server
D) client

Question 52

Each time a packet is copied,a counter associated with the packet increases by one.This counter is called the ____.

A) hop limit
B) time to live
C) TTL count
D) hop count

Question 53

A ____ profile describes various characteristics about the connection,such as basic data transfer rates,basic burst rates,excess data transfer rates,and excess burst rates.

A) bandwidth
B) server
C) client
D) router

Question 54

The two types of packet-switched networks are the datagram and the ____.

A) static circuit
B) fixed circuit
C) standard circuit
D) virtual circuit

Question 55

____ and virtual circuit networks require path setup time and cannot dynamically reroute packets should a network problem occur.

A) Broadcast
B) Wireless
C) Circuit-switched
D) Datagram

Question 56

When a node on a wide area network ____ network transmits its data,the data is received by all the other nodes.

A) broadcast
B) packet-switched
C) circuit-switched
D) datagram packet-switched

Question 57

To distinguish between a piece of data processed at the data link layer and a piece of data processed at the network layer,the term "____" is used at the data link layer,and the term "packet" is used at the network layer.

A) load
B) product
C) frame
D) payload

Question 58

A ____ network application provides some guarantee that information traveling through the network will be delivered to the intended receiver in the same order in which it was transmitted.

A) connectionless
B) connection-oriented
C) virtual circuit
D) packet-switched

Question 59

A ____ application does not guarantee the delivery of any information or data.

A) connectionless
B) connection-oriented
C) virtual circuit
D) packet-switched

Question 60

The ____-switched network is most often found in networks designed to transfer computer data (such as the Internet).

A) circuit
B) packet
C) protocol
D) port

Question 61

____ avoids congestion by requiring users to negotiate with the network regarding how much traffic they will be sending,or what resources the network must provide to satisfy the user's needs before the user sends any data.

A) Explicit congestion control
B) Implicit congestion control
C) Connection admission control
D) Buffer preallocation

Question 62

A(n)____________________ is a large surge of data that's transmitted for a short period of time.

Question 63

A(n)____________________ is a device that a user interacts with to access a network,and it contains the software application that allows someone to use the network for a particular purpose.

Question 64

____________________ is a data transfer service that can connect your business to another business (or businesses)using a standard Ethernet connection.

Question 65

When a network or a part of a network becomes so saturated with data packets that packet transfer is noticeably impeded,____ occurs.

A) network flowing
B) packet control
C) frame control
D) network congestion

Question 66

One of the primary advantages of ____ routing is the fact that no single node is responsible for maintaining all routing information.

A) centralized
B) focalized
C) distributed
D) local

Question 67

A ____ is a legally binding,written document,that can include service parameters offered in the service,various types of service/support options,incentives if the service levels are exceeded,and penalties if service levels are not met.

A) connection admission control
B) service level agreement
C) software license agreement
D) congestion control

Question 68

A network that expands into a metropolitan area and exhibits high data rates,high reliability,and low data loss is called a(n)___________________________________.

Question 69

____ routing involves storing all the routing information at one central location.

A) Distributed
B) Centralized
C) Remote
D) Fixed

Question 70

The speed at which a failover is performed is the ____________________.

Question 71

When an application is simply observing its own throughput and not relying on any special types of signals coming from the network,this is called ____ congestion control.

A) explicit
B) implicit
C) forward explicit
D) backward explicit

Question 72

With ____ routing,routing tables are created once,typically when the network is installed,and then never updated again.

A) fixed
B) adaptive
C) changing
D) modifying

Question 73

____________________ is a synchronous time division multiplexing technique that is capable of sending data at hundreds of millions of bits per second.

Question 74

When routing tables adapt to network changes,the routing system is called ____.

A) fixed
B) local
C) adaptive
D) static

Question 75

With ____,when a frame relay router experiences congestion,it sends a congestion signal forward to the destination station,which in turn tells the originating station to slow down the transfer of data.

A) forward explicit congestion notification (FECN)
B) backward explicit congestion notification (BECN)
C) implicit congestion control
D) remote congestion control

Question 76

A company that has a connection with Metro Ethernet can create a(n)____________________ for that connection.

Question 77

In ____,before one node sends a series of n packets to another node,the sending node inquires in advance whether the receiving node has enough buffer space for the n packets.

A) explicit congestion control
B) implicit congestion control
C) connection admission control
D) buffer preallocation

Question 78

____ and distributed routing are methods for controlling routing information.

A) Distributed
B) Adaptive
C) Fixed
D) Centralized

Question 79

The ability to reroute in the event of a failure is called ____________________.

Question 80

A(n)_________________________ is a collection of computers and computer-related equipment interconnected to perform a given function or functions and typically using local and long-distance telecommunications systems.