Question 1

A public telecommunications network can be described using for generic components:&#10;A)senders,receivers,lines,and nodes.&#10;B)subscribers,local loops,exchanges,and trunks.&#10;C)subscribers,trunks,nodes,and loops.&#10;D)senders,receivers,exchanges,and trunks.&#10;E)Local loops,subscriber lines,exchanges,and trunks.

Accepted Answer

The four generic components of a public telecommunications network are subscribers, local loops, exchanges, and trunks. Subscribers are the end-users who access the network, while local loops refer to the physical connection between the subscriber and the exchange. Exchanges are the switching centers that route the communication traffic, and trunks are the high-capacity lines that interconnect the exchanges. Therefore, option B - subscribers, local loops, exchanges, and trunks - accurately describes the components of a public telecommunications network.

Question 2

Use of digital transmission for applications such as telephone requires that a dedicated connection be established across the network.

Accepted Answer

Digital transmission for applications such as telephone requires a dedicated connection, often referred to as a circuit-switched connection, to be established across the network in order to guarantee the quality of connection needed for real-time communication.

Question 3

In circuit switching networks,channel capacity between each pair of stations and/or nodes along the connection path must be reserved regardless if used or not.

Accepted Answer

In circuit switching networks, a dedicated path is established between two stations before data transmission. The channel capacity along the path is reserved for the entire duration of the connection, regardless of whether or not data is being transmitted. This is different from packet switching networks where the bandwidth is shared among multiple users and dynamically allocated as needed.

Question 4

Which of the following is NOT a reason for network jitter when using packet switching networks?&#10;A)Packets may vary in length.&#10;B)Switches may vary in the time required to process packets.&#10;C)Packets may take different paths through the network.&#10;D)Packets may encounter network congestion.&#10;E)Data rates will vary from one trunk line to the next.

Accepted Answer

This statement is actually a reason for network jitter. Jitter occurs when packets arrive at different times due to varying network conditions. The varying data rates on different trunk lines can lead to different delays and jitter in packet arrival. Therefore, option E is not correct.

Question 5

Interconnection of computer systems is not reliable when using circuit switched networks.

Accepted Answer

Circuit switched networks, like traditional telephone systems, establish a dedicated connection for the duration of a communication session, ensuring a reliable and consistent connection quality throughout the session.

Question 6

Almost all wide area networks (WAN)user circuit switching.

Accepted Answer

Almost all WANs use packet switching instead of circuit switching. Packet switching allows for more efficient use of network bandwidth and resources by breaking data into smaller packets that can be sent independently over different routes and reassembled at the destination.

Question 7

Having multiple paths from one station to another through a network contributes to reliability.

Accepted Answer

Having multiple paths from one station to another provides alternative routes in case one path is blocked or unavailable, which increases the reliability of the network.

Question 8

Switching nodes are devices that enable data to be moved from senders to receivers.

Accepted Answer

Switching nodes, such as routers and switches, do indeed facilitate the movement of data between senders and receivers by forwarding packets of data to their intended destination.

Question 9

In a circuit switching network,the path that will be used through the network is determined prior to any data transfer.

Accepted Answer

In circuit switching, a dedicated path is established before data transfer takes place.

Question 10

It is desirable to have only one path from sender to receiver to avoid excess costs.

Accepted Answer

Having only one path from sender to receiver can increase the risk of disruptions or failure in the network. Multiple paths can provide redundancy and backup in case of network outages or congestion, and can also improve overall network performance. Therefore, it may not always be desirable to have only one path.

Question 11

In most networks,not every sender/receiver pair can be connected.

Accepted Answer

The answer of In most networks,not every sender/receiver pair can...

Question 12

The major application that uses circuit switching networks is the telephone system,thus most data transferred using this type of network is voice traffic.

Accepted Answer

The answer of The major application that uses circuit switching...

Question 13

Data communications via circuit switching involves three phases.These phases are&#10;A)connect,transfer,hangup&#10;B)ring,talk,hangup&#10;C)dial,transfer,disconnect&#10;D)establishment,data transfer,disconnect&#10;E)establishment,multiplex,hangup

Accepted Answer

The answer of Data communications via circuit switching involves three...

Question 14

Which of the following is NOT one of the stated advantages of packet switching over circuit switching?&#10;A)There is less network delay.&#10;B)Line efficiency is greater.&#10;C)Data rate conversion can be provided.&#10;D)Priorities can be used.&#10;E)Connections are never rejected.

Accepted Answer

The answer of Which of the following is NOT one...

Question 15

Basic packet switching technology has recently been developed to replace circuit switching.

Accepted Answer

The answer of Basic packet switching technology has recently been...

Question 16

Control signaling on circuit switching networks performs a number of functions.Which of the following is NOT one of classes of function for control signaling?&#10;A)establishment&#10;B)supervisory&#10;C)address&#10;D)call information&#10;E)network management

Accepted Answer

The answer of Control signaling on circuit switching networks performs...

Question 17

The public telephone network is a good example of a circuit switched network.

Accepted Answer

The answer of The public telephone network is a good...

Deck 12: Circuit Switching and Packet Switching