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The following parameters are defined for a switching network: Number of hops between two given end devices = N Length of a message = M

The following parameters are defined for a switching network:
Number of hops between two given end devices= N
Length of a message=M bits
The data speed = B bps (bits per second) on all network links
Fixed packet size = P bits
Header size = H bpp (bits per packets)
Call set up time (for Circuit switching)= S sec.
Propagation delay per hop = D sec.
5
For N=4 hops, L=3200 bits, S=0.2sec, B=9600bps, P=1024bits, D=0.001sec and H=16bpp. Find the
end-to-end delay for circuit switching and datagram packet switching. Assume that no
acknowledgement and processing delay exist at the nodes. (15 points)
Hint: For CS: let end-to-end delay = C1+ C2, where
C1= Call Setup Time
C2= Message Delivery Time=Propagation Delay + Transmission Time
(Consider how to determine transmission time).
For Datagram Packet Switching: let end-to-end delay =D1+ D2+ D3+ D4, where
D1= Time to Transmit and Deliver all packets through first hop
D2= Time to Deliver last packet across second hop
D3=Time to Deliver last packet across third hop
D4=Time to Deliver last packet across forth hop.

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