7 What is the last address of a block of classless addresses

7. What is the last address of a block of classless addresses if one of the addresses is 110.10.2.55/30?
Broadcast address=

Last usable address =

explain the process

Solution

Here net mask =30,any knwon IP= 110.10.2.55

that is there are 30 1\'s in the 32 bit netmask

So value is 255.255.255.252

To get last address , use formula

Last IP = any known IP (OR) (! netmask)

in binary 32 bit do the logical OR operation

To get broadcast address ,

First calculate network address,

Network address = any IP address (AND) netmask

Perform AND operation

Then calculatebroadcast address using

Broadcast address = network address (OR) (!Netmask)