Question

In which switching technique a dedicated and complete physical connection is established between two nodes
(A) Data Switching
(B) message switching
(C) circuit switching
(D) packet switching

Answer 1

Answer:

Switching techniques

In large networks, there can be multiple paths from sender to receiver. The switching technique will decide the best route for data transmission.

Switching technique is used to connect the systems for making one-to-one communication.

Classification Of Switching Techniques

Switching techniques

Circuit Switching

Circuit switching is a switching technique that establishes a dedicated path between sender and receiver.

In the Circuit Switching Technique, once the connection is established then the dedicated path will remain to exist until the connection is terminated.

Circuit switching in a network operates in a similar way as the telephone works.

A complete end-to-end path must exist before the communication takes place.

In case of circuit switching technique, when any user wants to send the data, voice, video, a request signal is sent to the receiver then the receiver sends back the acknowledgment to ensure the availability of the dedicated path. After receiving the acknowledgment, dedicated path transfers the data.

Circuit switching is used in public telephone network. It is used for voice transmission.

Fixed data can be transferred at a time in circuit switching technology.

Communication through circuit switching has 3 phases:

Circuit establishment

Data transfer

Circuit Disconnect

Switching techniques

Circuit Switching can use either of the two technologies:

Space Division Switches:

Space Division Switching is a circuit switching technology in which a single transmission path is accomplished in a switch by using a physically separate set of crosspoints.

Space Division Switching can be achieved by using crossbar switch. A crossbar switch is a metallic crosspoint or semiconductor gate that can be enabled or disabled by a control unit.

The Crossbar switch is made by using the semiconductor. For example, Xilinx crossbar switch using FPGAs.

Space Division Switching has high speed, high capacity, and nonblocking switches.

Space Division Switches can be categorized in two ways:

Crossbar Switch

Multistage Switch

Crossbar Switch

The Crossbar switch is a switch that has n input lines and n output lines. The crossbar switch has n2 intersection points known as crosspoints.