a. Describe NAT operation.

6a.) _______ is the process of presenting external IP addresses that are different from internal IP addresses used within the firm.

a. DNS

b. NAT

c. DHCP

d. None of the above

6a.) In NAT, the _______ creates new external source IP addresses and port numbers.

a. Router

b. Firewall

c. Source host

d. Destination host

b. What are the two benefits of NAT?

6b1.) NAT _______.

a. Allows a firm to have more internal IP addresses

b. Provides some security

c. Both A and B

d. Neither A nor B

6b2.) NAT _______.

a. Allows a firm to have more internal IP addresses

b. Reduces cost

c. Both A and B

d. Neither A nor B

c. How does NAT enhance security?

6c.) NAT enhances security by _______.

a. Preventing sniffers from learning internal IP addresses

b. Encryption

c. Both A and B

d. Neither A nor B

d. How does NAT allow a firm to deal with a shortage of IP addresses given to it by its ISP?

e. How are private IP address ranges used?

6e1.) Which of the following is a private IP address range?

a. 10.x.x.x

b. 128.171.x.x

c. Both A and B

d. Neither A nor B

6e2.) Which of the following IPv4 addresses would be used for Internet transmission?

a. 10.x.x.x

b. 128.171.x.x

c. Both A and B

d. Neither A nor B

f. Is NAT transparent to the operating systems of the two hosts involved?

6f.) For an internal client to use NAT to communicate with an external web-server, the client must be configured to do so.

a. True

b. False

g. To all applications?

6g.) NAT is transparent to all applications.

a. True

b. False