Deck 2: Lan/Wan Interconnectivity

Question 1

Taken together, the set of layers of the OSI model is called a stack.

Answer 1

True

Question 2

All MAUs must have terminators.

Answer 2

False

Question 3

The OSI is the product of which standards organization?

A)ISO
B)ANSI
C)IEEE
D)Both A and B.

Answer 3

D

Question 4

Discovery is the process of checking communication cable for a specific voltage level indicating the presence of a data-carrying signal.

Question 5

The figure above is a representation of a(n)digital signal.

Question 6

When data is transmitted in Ethernet communications, it is encapsulated in frames.

Question 7

A(n)backbone is a high-capacity communications medium that joins networks and central network devices on the same floor in a building, on different floors, and across long distances.

Question 8

The number, size, and frequency of packets transmitted on a network in a given amount of time is referred to as network usage .

Question 9

A(n)broadcast frame is one that is sent to all points on the network.

Question 10

A(n)T-carrier line is a dedicated telephone line that can be used for data communications to connect two different locations for continuous point-to-point communications.

Question 11

Typically, if a network has a low startup cost, there will be a low cost to maintain it.

Question 12

SSL is a data encryption technique employed between a server and a client.

Question 13

When using FDDI, it is possible for several frames from several nodes to be on the network at a given time.

Question 14

Throughput is the transmission capacity of a communications medium, which is typically measured in bits per second or hertz, and which is determined by the maximum minus the minimum transmission capacity.

Question 15

The telephone companies were the earliest source of WAN connectivity.

Question 16

It is okay to use Ethernet II and standard 802.3 frames among the same communicating nodes on the same network.

Question 17

The token ring transport method uses a physical star topology along with the logic of a(n)ring topology.

Question 18

In a traditional ring design, there are two terminators.

Question 19

____ encoding assigns a binary value to the presence of a particular signal state.

A)Binary
B)Current-state
C)State-transition
D)Basic

Question 20

Flow control ensures that one device does not send information faster than it can be received by another device.

Question 21

The figure above shows a ____ network.

A)bus
B)ring
C)star
D)None of the above.

Question 22

EMI is a source of ____ layer interference.

A)Data Link
B)Network
C)Physical
D)Transport

Question 23

Which is not true about bus networks?

A)They are relatively inexpensive to implement.
B)It is easy to isolate a single malfunctioning node or cable segment.
C)They work well for small networks.
D)None of the above.

Question 24

The P in PDU stands for ____.

A)protocol
B)peer
C)prototype
D)primitive

Question 25

____ is a process used by routers that involves gathering information about how many nodes are on a network and where they are located.

A)Encryption
B)Broadcasting
C)Beaconing
D)Discovery

Question 26

A device's MAC address is coded as a ____ number.

A)binary
B)decimal
C)hexadecimal
D)None of the above.

Question 27

The ____ layer offers a way to set up half- and full-duplex communications.

A)Communications
B)Network
C)Session
D)Transport

Question 28

Flow control software and capabilities are found in the ____ layer of the OSI model.

A)Network
B)Session
C)Transport
D)Data Link

Question 29

____ are used least frequently on networks.

A)Gateways
B)Bridges
C)Routers
D)Switches

Question 30

Which is not true when comparing the ring and bus topologies?

A)The ring topology is less expensive to implement than the bus topology.
B)The ring topology is easier to manage than the bus topology.
C)The ring topology enables more reliable communications than the bus.
D)None of the above.

Question 31

The figure above shows a ____ network.

A)bus
B)ring
C)star
D)None of the above.

Question 32

The MAC sublayer of the Data Link layer does not ____.

A)ensure reliable communications by initiating a communications link between two nodes and then guarding them against interruptions to the link
B)examine the physical or device address information contained in each frame
C)regulate how multiple devices share communications on the same network
D)None of the above.

Question 33

After the PDU is received by the next layer, the control information and transfer instructions are stripped out, and the resulting packet is called the ____.

A)stripped data unit
B)single data unit
C)service data unit
D)secure data unit

Question 34

The figure above shows a ____ network.

A)bus
B)ring
C)star
D)None of the above.

Question 35

____ generates the least amount of network traffic.

A)Network users primarily accessing word-processing software
B)Networks on which there is frequent exchange of database information
C)Scientific and publications software
D)Both A and B.

Question 36

The ____ topology is the oldest communications design method, with roots in telephone switching systems.

A)bus
B)ring
C)star
D)None of the above.

Question 37

____ protocols enable an OSI layer on a sending node to communicate with the same layer on the receiving node.

A)Layer
B)Peer
C)Link
D)Transfer

Question 38

Network interface cards, intelligent hubs, and bridges are found in the ____ layer of the OSI model.

A)Network
B)Physical
C)Transport
D)Data Link

Question 39

A primitive is ____.

A)a command used to transfer information from one layer in an OSI stack to another layer
B)the smallest unit of data allowed in the Physical layer
C)a command used to transfer information from an OSI layer on the sending node to the same layer on the receiving node
D)Both A and B.

Question 40

____ encoding simply checks for a change in the signal state, from low to high or high to low.

A)Binary
B)Current-state
C)State-transition
D)Basic

Question 41

The ____ part in a frame synchronizes frame transmission and consists of an alternating pattern of zeros and ones.

A)preamble
B)SFD
C)FCS
D)destination address

Question 42

The Ethernet protocol permits ____ node(s)to transmit at any time.

A)one
B)two
C)three
D)There is no limit.

Question 43

____ is the most efficient method.

A)TDMA
B)FDMA
C)Statistical multiple access
D)Both A and B.

Question 44

____ does not guarantee the most efficient use of the network medium, because transmission occurs on only one channel at a time.

A)TDMA
B)FDMA
C)Statistical multiple access
D)Both A and B.

Question 45

High-speed capability is especially important when images, graphics, and other large files need to be transported over long distance or onto WANs.

Question 46

____ is an error condition on a token ring network that indicates one or more nodes is not functioning.

A)Broadcasting
B)Switching
C)Redirecting
D)Beaconing

Question 47

The token ring access method was developed by ____.

A)HP
B)IBM
C)3Com
D)Intel

Question 48

The ____ field uses a cyclic redundancy check in a token ring frame.

A)frame check sequence
B)PAD
C)start delimiter
D)end delimiter

Question 49

____ is the process of transmitting a data-carrying packet over radio waves through short bursts.

A)Bursting
B)Packet radio
C)Beaconing
D)Broadcasting

Question 50

Which is not true about FDDI?

A)It uses token passing for network communications.
B)It uses fiber-optic cable as the communications medium.
C)It was developed in the mid-1980s to provide higher-speed data communications than that offered by Ethernet or token ring.
D)None of the above.

Question 51

In a connectionless protocol a logical connection is established between sending and receiving nodes before full communications begin.

Question 52

____ establishes a dedicated logical circuit between the two transmitting nodes.

A)Packet switching
B)Primitive switching
C)Message switching
D)Circuit switching

Question 53

____ uses a store-and-forward communication method to transmit data from sending to receiving node.

A)Packet switching
B)Primitive switching
C)Message switching
D)Circuit switching

Question 54

Two computers can communicate within a LAN or across a WAN even if they are not both operating under the same communication model.

Question 55

The ____ field is not a field in a token.

A)access control
B)starting delimiter
C)ending delimiter
D)None of the above.

Question 56

Ethernet currently enjoys more popularity than token ring because there are many Ethernet network equipment options and because it is well-suited for high-speed WAN connectivity.

Question 57

The ____ topology is the most popular topology in use.

A)bus
B)ring
C)star
D)None of the above.

Question 58

Ethernet uses a control method known as CSMA/CD.

Question 59

Token ring is defined through the IEEE 802.3 specifications.

Question 60

____ divides the channels into frequencies, and each channel has its own broadcast frequency and bandwidth.

A)TDMA
B)FDMA
C)Statistical multiple access
D)Both A and B.

Question 61

What is a redirector? What OSI layer is it used in?

Question 62

The ____________________ is the total amount of communications cable that makes up a network.

Question 63

What is a MAU? With which type of access method are MAUs associated?

Question 64

Modern networks combine the logical communications of a(n)____________________ with the physical layout of a(n)____________________.

Question 65

Regional telephone companies are also called ____________________ or regional bell operating companies (RBOCs).

Question 66

What is encryption? Which OSI layer is responsible for encryption?

Question 67

What are the two types of packets that can be sent by FDDI? When is each type used?

Question 68

Each token ring network designates one node as the ____________________, which is responsible for packet timing on the network and for issuing new token frames if problems occur.

Question 69

An ordinary radio or telephone signal is an example of a(n)____________________ transmission.

Question 70

List three ways in which the OSI model, over the years, has facilitated the growth in network communications.

Question 71

____________________ are logical communication paths set up to send and receive data.

Question 72

FDDI employs two rings, so that if one ring malfunctions, data can reach its destination on the other ring.

Question 73

What is a hub? With which network topology are hubs associated?

Question 74

Satellite is the most expensive way to build a wireless WAN that connects LANs.

Question 75

____________________ is a network communication technique that uses a dedicated channel to transmit information between two nodes.

Question 76

____________________ is used to provide a way to quickly adapt protocols that are not fully compliant with 802.2 standards, such as AppleTalk and DEC's LAT protocols.

Question 77

Broadcast storms are more common on token ring networks than on Ethernet networks.

Question 78

What is a cyclic redundancy check, and at which OSI layer is it performed?

Question 79

A bus network has a(n)____________________ at each end.

Question 80

What is a collision? How are collisions detected?