DsmbISP Chapter 4 - (Version 4.1)

1. In an 8 bit binary number, what is the total number of combinations of the eight bits?

2. Convert the decimal number 231 into its binary equivalent. Select the correct answer from the list below.

3. How many usable hosts are available given a Class C IP address with the default subnet mask?

4. What is the network broadcast address for a Class C address of with the default subnet mask?

5. Company XYZ uses a network address of It uses the mask of to create subnets. What is the maximum number of usable hosts in each subnet?

6. Which IPv4 class provides the highest number of host addresses per network?
*Class A

7. Which statement accurately describes public IP addresses?
*Public IP addresses must be unique across the entire Internet.

8. Refer to the exhibit. Host A is connected to the LAN, but it cannot get access to any resources on the Internet. The configuration of the host is shown in the exhibit. What could be the cause of the problem?
*The default gateway is on a different subnet from the host.

9. What are two reasons that NAT was developed? (Choose two.)
*to preserve registered public IP addresses
*to provide a method for privately addressed LANs to participate in the Internet

10. IPv6 increases the IP address size from 32 bits to how many bits?

11. Which two statements describe classful IP addresses? (Choose two.)
*The number of bits used to identify the hosts is fixed by the class of the network.
*All subnets in a network are the same size.

12. Which statement describes NAT overload or PAT?
*Many internal addresses can be translated to a single IP address using different port assignments.

13. What must happen for a privately addressed host on an inside local network to be able to communicate with an outside destination host on the Internet?
*The host IP address must be translated to an inside global address.

14. What is the range of the first octet in a Class B address?
*128 to 191

15. Which option shows the proper notation for an IPv6 address?

16. Refer to the exhibit. Which range of IP addresses would allow hosts that are connected to the Router1 Fa0/0 interface to access outside networks?
* through

17. Static NAT works by mapping a specific inside local IP address to what other specific address type?
*private IP address

18. Which port numbers are used by PAT to create unique global addresses?
*1024 and above

19. Refer to the exhibit. R1 is performing NAT for the inside network. HostA has sent a request to the web server. What is the destination IP address of the return packet from the web server?


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