1. In the original classful address scheme, was it possible to determine the class of an address from the address itself? Explain.

2. If an ISP assigned you a /28 address block, how many computers could you assign an address?

3. If an ISP offers a / 28 address block for 160 dollars per month and a / 27 address block for 160 dollars per month, which has the cheapest cost per computer?

4. Suppose you are an ISP with a / 24 address block. Explain whether you accommodate a request from a customer who needs addresses for 255 computers.

5. Can a host have more than one IP address? Explain.

6. What are two advantages of requiring the ultimate destination to reassemble fragments?

7. Fragments from multiple datagrams can arrive out-of-order. How does it reassemble fragments that arrive out-of-order?

8. A datagram cannot be reassembled until all fragments arrive. Explain what will happen if one or more fragments from a datagram arrive and other fragments are delayed or lost?

9. Your IP address is 121.76.98.18

subnet mask is 255.255.0.0

• What is subnet address?
• Broadcast address?
• Number of host on this network?
• Host address range?

10. Your IP address is 212.45.66.115

subnet mask is 255.255.255.128

• What is subnet address?
• Broadcast address?
• Number of host on this network?
• Host address range?

11.Your IP address is 168.195.98.18

subnet mask is 255.255.254.0

• What is subnet address?
• Broadcast address?
• Number of host on this network?
• Host address range?

12. Your IP address is 45.122.69.115

subnet mask is 255.255.255.128

• What is subnet address?
• Broadcast address?
• Number of host on this network?
• Host address range?