Detailed computer network exercises (4) network layer

4.13


answer:

4.14


answer:

4.17



answer:

Each of the above offsets should be an integer multiple of 8 bytes, that is, 64 bits, and every 8 bytes is an offset. The MAC frame data part (IP datagram) is generally 1500 bytes, that is, the above 1200 bit expression the meaning of.
Knowledge points:

4.20


answer:

4.21


answer:

4.22


answer:

4.26



answer:


Knowledge point: merge supernet
It's similar to subnetting. Conversely, the merged supernet of class C addresses can also be subnetted according to class B addresses.

4.28


answer:

4.29


answer:
There are many answers to this question. The principle of solving the problem is to first assign IP addresses to the network segment with a large number of hosts, such as LAN 3, LAN 2 LAN_3, LAN_2L A N3,L A N2Two network segments

4.41


answer:

4.42



answer:

4.56


answer:

4.57


answer:

4.58


answer:

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