1) Suppose we have the following IP addresses for two different organizations, we have to create...

1) Suppose we have the following IP addresses for two different organizations, we have to create 5 networks having 30 hosts in it. Find first sub network ID, Fist address, Last address and Broadcast for each of the following given addresses?

a) 14.23.120.8

b) 252.5.15.111

Expert Solution

Network ID	First address	Last address	Broadcast
14.23.120.0	14.23.120.1	14.23.120.30	14.23.120.31
14.23.120.32	14.23.120.33	14.23.120.62	14.23.120.63
14.23.120.64	14.23.120.65	14.23.120.94	14.23.120.95
14.23.120.96	14.23.120.97	14.23.120.126	14.23.120.127
14.23.120.128	14.23.120.129	14.23.120.158	14.23.120.159

We need 30 hosts per subnet and formula of IPv4 is 2^n where n is number of bits to borrow from default subnet mask where here default subnet mask is used for class c which is 255.255.255.0 where 256 hosts are available but we divide it into 5 subnet so we cant get that exact number as 2^n is applied so we will get 8 subnet 2^3=8 so we need 3 bits to borrow from 255.255.255.0 so new subnet mask will be 255.255.255.224 and bits are borrowed from binary so for clarification.

11111111.11111111.11111111.00000000 for 255.255.255.0
11111111.11111111.11111111.11100000 new subnet mask with 8 subnet 255.255.255.224

same calculation for 2nd network

Network ID	First address	Last address	Broadcast
252.5.15.0	252.5.15.1	252.5.15.30	252.5.15.31
252.5.15.32	252.5.15.33	252.5.15.62	252.5.15.63
252.5.15.64	252.5.15.65	252.5.15.94	252.5.15.95
252.5.15.96	252.5.15.97	252.5.15.126	252.5.15.127
252.5.15.128	252.5.15.129	252.5.15.158	252.5.15.159

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venereology answered 6 months ago

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