You have three network paradigms from which to choose Circuit Switching Packet S

Question

You have three network paradigms from which to choose Circuit Switching Packet Switching Datagram Packet Switching Virtual Call Select and justify the network class which is most appropriate for the application a. [4 pts] An Automatic Teller Machine network with a single short initiating message and a single b. [4 pts] A data base backup system which transfers a huge file (the contents of the data base) to c. [4 pts] An interactive computer education system. While "on-line" the user transmits relatively short response message each transaction. The user's objective is minimum response time a remote location. The user's objective is high throughput. short requests to a CPU which returns screens of educational course work. The user's objective is low transit time. [4 pts] A video imaging system in which a doctor at a remote location views surgery in real- time. The user's obiective is minimum transit time AND minimum transit time deviation. d.

Explanation / Answer

a) In this case, the circuit switching network with full duplex mode would be preferable,because in ful duplex mode, two channels are allocated, one for transmitting the request and one for the response of the request, This service is mainly used for real time srvices withou any much delay.

b) This type of case should use packet switching network virtual call. In packet switching, station breaks long message into packets.

In virtual circuit, preplanned route is established before any packets are transmitted. In this, routing decisions for each packet are not needed.

c)  This type of case should use packet switching datagram. Packets are sent to the network. Each packet is treated independently. Packets can take ant practical route. Packets may arrive out of order. But the transit time for the packets to arrive at destination is less in this technique.

d) In this case, the circuit switching network with full duplex mode would be preferable,because in ful duplex mode, two channels are allocated, one for transmitting the request and one for the response of the request, This service is mainly used for real time srvices withou any much delay. Quality of ervice is also ensured in this tyoe of switching.

THANK YOU.

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