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 class-B network has 61 subnets and the largest subnetwork has 900 hosts. What is your subnet mask among those provided below? Please explain. A. 255.255.240.0 B. 255.255.248.0 C. 255.255.252.0 D. 255.255.254.0 E. Not enough information is given to answer the question. 3. A host with IP address 14.23.67.3 sends a message to a host with IP address 14.45.23.7. Does the message travel through any router? 4. One of your IP addresses is 132.247.200.100, and your network has 32 physical segments (subnets). Which one of the following subnet masks would you use to allow the greatest number of hosts on each subnet? Please explain. A. 255.255.224.0 B. 255.255.248.0 C. 255.255.252.0 D. 255.255.254.0 E. none of the above. 5. 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? 6. What subnet masks would possibly be used by a network that has an internal subnet with the IP address 128.235.232.160 and a host in another subnet with the IP address 128.235.245.226. (Make a distinction between what is called a network and a subnet). Assume that the entire network would use a single subnet mask, i.e., the same subnet mask on all subnets in the network, and a contiguous subnet mask. 7. Find the fragment offset values in 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. 8. Assume that you have four hosts in an Ethernet segment. These hosts have their IP addresses as shown below and those addresses are fixed (they cannot be changed). Find 1 subnet mask these hosts can possibly use such that they can be considered in the same subnet. Please indicate explain your solution. Host1: 145.122.146.25, Host2: 145.122.95.137, Host3: 145.122.42.9, Host4: 145.122.48.56