Problem 2. Consider a packet of L bits that is sent over a path of Q links (i.e., a source and destination connected by a sequence of (Q-1) routers or switches). Each link transmits at R bps. This packet is the only traffic transmitted by the network (so there are no queuing delays) and the propagation delay and processing delay at routers are negligible. How long does it take to send this packet from source to destination if the network is: a) a packet-switched datagram network b) a circuit-switched network. Assume that bandwidth of R bps on each link is sliced into five individual circuits, so that cach circuit receives (R/5) bandwidth. Also assume that the circuit setup time is 1,. c) Give an expression for the number of links Q such that the packet delivery from the sender to the receiver will be faster over the packet-switched network, and the expression for the number of links Q such that the circuit-switched network will be faster.

Problem 2. Consider a packet of L bits that is sent over a path of Q links (i.e., a source and destination connected by a sequence of (Q-1) routers or switches). Each link transmits at R bps. This packet is the only traffic transmitted by the network (so there are no queuing delays) and the propagation delay and processing delay at routers are negligible. How long does it take to send this packet from source to destination if the network is: a) a packet-switched datagram network b) a circuit-switched network. Assume that bandwidth of R bps on each link is sliced into five individual circuits, so that cach circuit receives (R/5) bandwidth. Also assume that the circuit setup time is 1,. c) Give an expression for the number of links Q such that the packet delivery from the sender to the receiver will be faster over the packet-switched network, and the expression for the number of links Q such that the circuit-switched network will be faster.

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Question

Problem 2.
Consider a packet of L bits that is sent over a path of Q links (i.e., a source and destination
connected by a sequence of (Q-1) routers or switches). Each link transmits at R bps. This packet is the only traffic
transmitted by the network (so there are no queuing delays) and the propagation delay and processing delay at
routers are negligible. How long does it take to send this packet from source to destination if the network is:
a) a packet-switched datagram network
b) a circuit-switched network. Assume that bandwidth of R bps on each link is sliced into five
individual circuits, so that cach circuit receives (R/5) bandwidth. Also assume that the circuit
setup time is t,..
Give an expression for the number of links Q such that the packet delivery from the sender to the
receiver will be faster over the packet-switched network, and the expression for the number of
links Q such that the circuit-switched network will be faster.

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