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2 votes
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Resource Reservation is a feature of:
A. Circuit Switching
B. Packet Switching
C. Both (A) and (B)
D. None of these

PS: In virtual packet switching resouce allocation is done during setup, while in datagram packet switching, there is no allocation. http://www.slideshare.net/mukeshnt/chap-8-switching

5 Answers

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4 votes

Resource Reservation is the feature of Circuit Switching. It is applied in Physical Layer.

In Circuit Switching, when the first packet of the stream goes through the router , it informs all of them that more packets are following it. The memory and CPU is reserved for the following packet for processing and forwarding.It is called circuit setup. When the circuit setup is done, all the packet follows the first packet. (Next packet follows previous packet)

That is why,

1) Packet does not need header except the first packet in circuit switching

2) Packet is recieved in-order at the reciever side.  

This the reason, while large amounts of data need to be sent,the packet switching is used.

1 votes
1 votes

Ans is C.

Circuit switching uses reservation of resources, this is true.

Now in Packet switching we have 2 kinds --> 1. Datagram (does not require reservation of resource)

                                                                        2. Virtual circuits ( Requires resource reservation)

In the question it is not mentioned whether we are using Virtual circuits or Datagram for packet switching.  So we have to take both cases (unlike the other answers i have seen so far which has only considered datagram in packet switching).

So we require reservation of resources in both the cases and unless it not mentioned whether we are using VC or datagram in packet switching we can say that both uses resource reservation.

0 votes
0 votes
In a packet-switched network, there is no resource reservation.

Resource reservation is present in circuit switched network and virtual circuit network.

As given in Forouzan.

Hence option A should be correct option.
Answer:

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