1. A NAT router connects a private network to the Internet and uses global IP address 25.25.25.25. Host 10.0.0.1 on the private network sends an IP packet to a server at 80.80.80.80

a. What will be the source and destination IP addresses in the packet header after it leaves the sending host on the private network?

Source IP _______________________________________

Destination IP ________________________________________

b. What will be the source and destination IP addresses in the packet header after it leaves the NAT router?

Source IP _______________________________________

Destination IP ________________________________________

1. We wish to create 16 subnets in a /24 network. Assume that we wish to use the minimum number of bits for the subnet id.

a. How many bits will be used for the subnet id? ______________

b. How many possible hosts are there on each subnet? ______________

c. What is the mask for the subnets in slash notation? ______________

2. A /16 network uses 7 bits for a subnet id.

a. How many possible subnets are there? _________________

b. How many bits will be in the hostid? _________________

c. How many possible hosts are there on each subnet? _________________

d. What is the mask for the subnets in slash notation? _________________

3. An ISP has CIDR block 134.103.128.0/17. The ISP wants to create 3 sub-blocks from this block.

a. How many bits should the ISP add to the _____________________

mask for the subblocks?

b. What are the addresses (in dotted decimal, with the mask in slash format) for each subblock?

______________________________________

________________________________________

_________________________________________

c. What is the maximum number of hosts in each subblock? _______________

d. For the first subblock, what is the network address?

_____________________________________________________________

e. For the first subblock, what is the broadcast address?

______________________________________________________________

f. For the first subblock, what range of addresses can be assigned to hosts?

_______________________________________________________ to

_______________________________________________________

4. For each IP address below, state whether it is a private or public IP address.

a. 192.168.64.7 ____________________________

b. 153.6.2.1 ____________________________

c. 10.164.19.5 _____________________________