Deck 9: Wan Technology and Protocols

Question 1

Circuit switching is very efficient in handling digital data.

Answer 1

False

Question 2

Circuit switching connections ________.

A)require manual intervention
B)are opaque
C)require one time automated set up
D)are transparent

Answer 2

D

Question 3

With circuit switching,switching and transmission resources within the network are reserved for the exclusive use of the circuit for the duration of the connection.

Answer 3

True

Question 4

Circuit switching is a transparent service.

Question 5

The packet switching network is a distributed collection of packet switching nodes.Because the nodes are distributed,there is a time delay between a change in status in one portion of the network and knowledge of that change elsewhere.

Question 6

With ________ a dedicated path is established between two stations for communication.

A)block switching
B)packet switching
C)circuit switching
D)X)25

Question 7

Circuit switching remains one of the few effective technologies for long distance communications.

Question 8

Analog data must be converted to digital before transmission for packet switching.

Question 9

Circuit switching and packet switching are traditional approaches to wide area network design.

Question 10

Each packet contains some portion of the user data plus control information needed for proper functioning of the network.

Question 11

Priorities cannot be used with packet switching.

Question 12

Typically standards for packet-switching network interfaces do not define a virtual circuit service.

Question 13

Circuit switching was developed to handle ________ traffic.

A)voice
B)A/V
C)video
D)data

Question 14

X.25 is the standard protocol used for traditional ________ networks.

A)packet switching
B)circuit switching
C)subscriber loop
D)virtual

Question 15

Node-node links are usually multiplexed using either frequency division multiplexing or time division multiplexing.

Question 16

Circuit switching is the basis for private networks built on leased lines and using on site circuit switches.

Question 17

Another well known application of circuit switching is the PBX.

Question 18

With packet switching,a station transmits data in small blocks called ________.

A)data blocks
B)boxes
C)channels
D)packets

Question 19

Elaborate algorithms are used to cope with the time delay and overhead penalties of network operation in a packet switching network.

Question 20

Circuit switching connections do not appear to attached devices as direct connections.

Question 21

With ________ virtual circuits a route is defined between two endpoints and all packets for that virtual circuit follow the same route.

Question 22

Communication via circuit switching involves three phases: circuit establishment,data transfer and ________.

Question 23

In a ________ network,data entering the network from a station are routed to the destination by being switched from node to node.

A)communications
B)ATM
C)switched communication
D)packet switching

Question 24

The ________ element represents the functions and hardware needed to connect digital devices such as data processing devices and digital telephones to the network.

A)media gateway
B)digital switch
C)control unit
D)network interface

Question 25

The devices attached to a network are referred to as ________.These may be computers,terminals,telephones or other communicating devices.

A)entities
B)relays
C)nodes
D)stations

Question 26

In the ________ approach in packet switching each packet is treated independently with no reference to packets that have gone before.

A)datagram
B)media gateway
C)softswitch
D)virtual circuit

Question 27

________ switching is used in public telephone networks.

Question 28

A switching center that directly supports subscribers is known as ________.

A)a subscriber loop
B)a subscriber center
C)a branch exchange
D)an end office

Question 29

A ________ can convert a stream of digitized voice bits into packets.

A)softswitch
B)node
C)LAPF
D)virtual circuit

Question 30

Flexibility,resource sharing,robustness,and responsiveness are all advantages of ________ switching.

Question 31

On a network,the switching devices whose purpose is to provide communication are called ________.These are connected to one another in some topology by transmission links.

A)routers
B)bridges
C)stations
D)nodes

Question 32

A specific preplanned route through the network between two stations is a(n)________ virtual circuit.

A)transport
B)direct
C)internal
D)external

Question 33

________ switching was designed to provide a more efficient facility for bursty data traffic.The attached stations must organize their data into packets for transmission.

Question 34

The term ________ refers to the logical connection between two stations through the network.

Question 35

________ switching involves the partitioning of a lower speed bit stream into pieces that share a higher speed stream with other bit streams.The individual pieces are manipulated by control logic to route data from input to output.

A)Packet
B)Time division
C)Circuit
D)Space division

Question 36

Three types of delays are: propagation delay,transmission time and ________ delay.

Question 37

Each station in a network connects to a node,and the collection of nodes is referred to as a ________ network.

Question 38

A key distinguishing element of packet switching networks is whether the internal operation is datagram or ________.

Question 39

Dynamic use of bandwidth is utilized with ________.

A)virtual circuit packet switching and circuit switching
B)datagram packet switching and virtual circuit packet switching
C)circuit switching and datagram packet switching
D)space division switching and circuit switching

Question 40

With internal ________ each packet is treated independently and packets intended for the same destination may follow different routes.

Question 41

A ________ switch is one in which the signal paths are physically separate from one another.Each connection requires the establishment of a physical path through the switch that is dedicated solely to the transfer of signals between the two endpoints.

Question 42

The branches between exchanges are called ________.They carry multiple voice frequency circuits using either FDM or synchronous TDM.

Question 43

A ________ is a general purpose computer running specialized software that turns it into a smart phone switch.These cost significantly less than traditional circuit switches and can provide more functionality.

Question 44

The ________ level deals with the physical interface between an attached station and the link that attaches that station to the packet switching node.

Question 45

The function of the ________ is to provide a transparent signal path between any pair of attached devices.