In a block of addresses, we know the IP address of one host is 101.10.11. X / ID4+5. What are the first address (network address) and the last address (limited broadcast address) in this block? (Note: X is the sum of your ID e.g. if your ID is 14481, X = 15, ID8+1 is the sum of 8th and 1 th digit of your roll number e.g. 8+1 = 9)
Answers
Answer:
Mask – It is a 32-bit binary number that gives the network address in the address block when AND operation is bitwise applied on the mask and any IP address of the block.
The default mask in different classes are :
Class A – 255.0.0.0
Class B – 255.255.0.0
Class C – 255.255.255.0
Example : Given IP address 132.6.17.85 and default class B mask, find the beginning address (network address).
Solution : The default mask is 255.255.0.0, which means that the only the first 2 bytes are preserved and the other 2 bytes are set to 0. Therefore, the network address is 132.6.0.0.
Subnetting: Dividing a large block of addresses into several contiguous sub-blocks and assigning these sub-blocks to different smaller networks is called subnetting. It is a practice that is widely used when classless addressing is done.