Made Easy Computer Networks

Question

A supernet has first address of 205.16.32.0 and a supernet mask of 255.255.248.0. How many blocks are in this supernet and what is the range of addresses?

Comments

Is that a classes address

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whats the answer given ?

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@ajaysoni1924 Please clarify.

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@nishant_magardeIn supernetting we need network id of first block of supernet and supernet mask to find out number of blocks in supernet and define their range

so here 

Supernet mask 255.255.248 has 21 1's

and default supernet mask for class C have 24 1's (255.255.255.0)

​​​​so there is difference of 3 1's that's why number of blocks present are 2^3=8.

its range is from 205.16.32.0 to 205.16.39.0

where first address is 205.16.32.0 and last address is 205.16.39.255.

 

Answer 1

In supernetting we need network id of first block of supernet and supernet mask to find out number of blocks in supernet and define their range so here

Supernet mask 255.255.248 has 21 1's

and default supernet mask for class C have 24 1's (255.255.255.0)

​​​​so there is difference of 3 1's that's why number of blocks present are 2^3=8.

its range is from 205.16.32.0 to 205.16.39.0

where first address is 205.16.32.0 and last address is 205.16.39.255.

Answer 2

It is class C so NID will be 24, in subnet mask no of 1's will be NID and SID and no of zeros will be HID  let those be n so number of Ip addresses that will be configurable will be 2^n-2.

Comments

Question is asked on supernet not on subnet

Answer 3

As the Internet has grown, it has emerge as extra hard for corporations to attain Class A or Class B addresses for their networks. Most Class A or B community addresses have already been assigned. The problem is compounded through the fact that Class C networks are constrained to a maximum of 254 hosts.If for more apply here.