5. IP/Datagram Forwarding (20 pt.) (show all the details/work for all questions-

Question

5. IP/Datagram Forwarding (20 pt.) (show all the details/work for all questions-a.b.c) a. Consider an IP subnet with prefix 129.17.129.97/27. Provide the range of IP addresses (of form xxx.xxx.xxx.xxx to yyy.yyy.yyy.yyy) that can be assigned to this subnet. (2 pt) (show all the details/work) b. Suppose an organization owns the block of addresses of the form 129.17.129.97/27. Suppose it wants to create four IP subnets from this block, with each block having the same number of IP addresses. What are the prefixes (of fom xxx.xxx.xxx/y) for the four IP subnets? (8 pt) (show all the details/work - include assumptions made) C. Consider the network shown below. Each of the subnets A-D contains at most 30 hosts; subnet E connects routers R1 and R2. (10 pt) Subnet B: Subnet C: Subnet E: Subnet A: R2 R1 Subnet D: to public Internet via ISP Assign network addresses (of form a.b.c.yyy/x) to the five subnets shown above (that is, write the addresses you have assigned. Note: a, b, & c remain the same (as the left-most 3 octets), but you will work to replace yyy and x). (show all the details/work -include assumptions made)

Explanation / Answer

Answer :

a) We have given :

IP address subnet with prefix 129.17.129.97/27

Now subnets we can have = 32 - 27 = 5 subnets

Each subnet have 2^5 = 32 ip addresses

Thus the range is 129.17.129.96 to 129. 17.129.129.127

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