1. If an ISP assigned you a / 28 IPv6 address block, how many computers could be assigned an address from the block?

2. If an ISP offers a / 17 address block for N dollars per month and a / 16 address block for 1.5 N dollars per month, which has the cheapest cost per computer?

3. Is the CIDR prefix 1.2.3.4 / 29 valid? Why or why not?

4. Suppose you are an ISP with a / 24 IPv4 address block. Explain whether you can accommodate a request from a customer who needs addresses for 255 computers. (Hint: consider the special addresses.)

5. Suppose you are an ISP that owns a / 22 IPv4 address block. Show the CIDR allocation you would use to allocate address blocks to four customers who need addresses for 60 computers each.

6.Suppose you are an ISP that owns a / 22 IPv4 address block. Can you accommodate requests from six customers who need addresses for 9, 15, 20, 41, 128, and 260 computers, respectively? If so, how? If not, explain why.