1- What class address is the IP address 126.55.12.120? Identify the network id, the subnetwork id, and the host id for the above IP address and the mask 255.255.255.240.

2- Your subnet has an IP address 128.23.75.0 and a subnet mask 255.255.255.128. What is the IP-address range that can be assigned to hosts in that subnet?

3- Find thefragment offset valuesin the IP header for each fragment of a datagram with a 400-byte payload (IP header with no options) when the datagram travels through a segment with an MTU= 100 bytes.