Problem 3 Consider the problem of deciding whether to implement a virtual- circuit or a datagram network. Assume a network protocol that allows the system to operate as either a virtual circuit network or a datagram network. That is, its packet header format is specified such that it incorporates both a VCI (Virtual Circuit Identifier) and an arbitrary source/destination addresses. When operating as a virtual circuit, it requires a 4-byte header. When operating as a datagram network, it requires a 40-byte header. Assume that there are 4 hops from source to destination, and that a set up or tear down request packet is 80 bytes (including the header). The total message length is 4096 bytes, the data rate is 9600 bps on all links and the packet size is 256 bytes (including the header). i) If we operate in the datagram mode, how long does it take for the first packet to reach the destination? If we operate in virtual-circuit mode, how long does it take for the first packet to reach the destination? Compute the end-to-end delay for datagram transmission? Compute the transmission? ii) iii) iv) end-to-end delay for virtual-circuit

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
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Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Problem 3
Consider the problem of deciding whether to implement a virtual-
circuit or a datagram network. Assume a network protocol that allows
the system to operate as either a virtual circuit network or a datagram
network. That is, its packet header format is specified such that it
incorporates both a VCI (Virtual Circuit Identifier) and an arbitrary
source/destination addresses.
When operating as a virtual circuit, it requires a 4-byte header. When
operating as a datagram network, it requires a 40-byte header.
Assume that there are 4 hops from source to destination, and that a
set up or tear down request packet is 80 bytes (including the header).
The total message length is 4096 bytes, the data rate is 9600 bps on
all links and the packet size is 256 bytes (including the header).
i)
If we operate in the datagram mode, how long does it take
for the first packet to reach the destination?
If we operate in virtual-circuit mode, how long does it take
for the first packet to reach the destination?
Compute the end-to-end delay for datagram transmission?
Compute the end-to-end
transmission?
ii)
iii)
iv)
delay for virtual-circuit
Transcribed Image Text:Problem 3 Consider the problem of deciding whether to implement a virtual- circuit or a datagram network. Assume a network protocol that allows the system to operate as either a virtual circuit network or a datagram network. That is, its packet header format is specified such that it incorporates both a VCI (Virtual Circuit Identifier) and an arbitrary source/destination addresses. When operating as a virtual circuit, it requires a 4-byte header. When operating as a datagram network, it requires a 40-byte header. Assume that there are 4 hops from source to destination, and that a set up or tear down request packet is 80 bytes (including the header). The total message length is 4096 bytes, the data rate is 9600 bps on all links and the packet size is 256 bytes (including the header). i) If we operate in the datagram mode, how long does it take for the first packet to reach the destination? If we operate in virtual-circuit mode, how long does it take for the first packet to reach the destination? Compute the end-to-end delay for datagram transmission? Compute the end-to-end transmission? ii) iii) iv) delay for virtual-circuit
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