Introduction to Networking: Chapter 7

20. Which of the following is an invalid IP address for a host?

224.0.0.1 is a multicast address and cannot be used to address hosts.

8. In a Class C IP address, how long is the network address?

24 bits: A default Class C subnet mask is 255.255.255.0, which means that the first three octets, or first 24 bits, are the network number.

2. A host automatically configured with an address from which of the following ranges indicates an inability to contact a DHCP server?

APIPA uses the link-local private address range of 169.254.0.0 through 169.254.255.255 and a subnet mask of 255.255.0.0. These addresses are not Internet routable and cannot, by default, be used across routers on an internetwork.

6. Which of the following describes a broadcast address?

All host bits are on (1s).: If you turned on all host bits (all of the host bits are 1s), this would be a broadcast address for that network.

24. What defines a unicast address?

An IP address assigned to an interface, considered a ONE-TO-ONE communication.

11. An IPv4 address uses 32 bits. How many bits is an IPv6 address?

An IPv6 address is 128 bits in size.

23. What is the term for the AUTO-CONFIGURATION technology responsible for addresses that start with 169.254?

Automatic Private IP Addressing (APIPA) configuring themselves with addresses that begin with 169.254.

18. List the four classes of private IP addresses? (Choose two.)

1. 10.0.0.0 to 10.255.255.255: Class A 2. 172.16.0.0 to 172.31.255.255: Class B 3. 192.168.0.0 to 192.168.255.255: Class C 4. 169.254.0.0 to 169.254.255.255: APIPA

16. What two statements about IPv4 and IPv6 addresses are true? (Choose two.)

1. An IPv4 address is 32 bits long, represented in decimal. 2. An IPv6 address is 128 bits long, represented in hexadecimal.

22. Name some of the benefits of IPv6 over IPv4.

1. More available addresses, 2. Simpler header, 3. Options for authentication, and 4. Other security FEATURES.

15. What two statements about IPv6 addresses are true? (Choose two.)

1. Two colons (::) are used to represent successive hexadecimal fields of zeros. 2. A single interface will have multiple IPv6 addresses of different types.

14. You want to ping the loopback address of your local host. Which two addresses could you type? (Choose two.)

1. ping 127.0.0.1 2. ping ::1

4. Which of the following is a valid Class A address?

126.10.0.1: The Class A range is 1 through 126 in the first octet/byte, so only option D is a valid Class A address.

5. Which of the following is a valid Class B address?

129.1.1.1: The Class B range is 128 through 191 in the first octet/byte. Only option C is a valid Class B address.

28. What is the private address range for Class B networks?

172.16.0.0 through 172.31.255.255

1. Which of the following addresses is not allowed on the Internet?

172.16.0.0 through 172.31.255.255 are all considered private, based on RFC 1918.

29. What is the Class C range of values for the first octet in decimal and in binary?

192-223, 110xxxxx

17. Which of the following is a Class C network address?

192.255.254.0

27. IPv6 has how many more bits, compared to addresses in IPv4?

96 more bits than IPv4

19. IPv6 unicast routing is running on the Corp router. Which of the following addresses would be used as the EUI-64 address?

FE80::3c3d:2d:bdff:fe3b:0d80

7. Which of the following is a layer 2 broadcast?

FF.FF.FF.FF.FF.FF: A Layer 2 broadcast is also referred to as a MAC address broadcast, which is in hexadecimal and is FF.FF.FF.FF.FF.FF. 12 Fs of 2, separated by a period mark.

30. What is the 127.0.0.1 address used for?

Loopback or diagnostics. Actually, the full range of 127.0.0.1 through 127.255.255.254 is referred to as the loopback address.

26. What is the name for a 48-bit (6-byte) numerical address physically assigned to a network interface, such as a Network Interface Card (NIC)?

MAC address/hardware address/burned-in address.

25. What defines a multicast address?

One-to-Many address

12. Which of the following is true when describing a multicast address?

Packets addressed to a multicast address are delivered to all interfaces identified by the multicast address, the same as in IPv4. A multicast address is also called a ONE-TO-MANY address. You can tell multicast addresses in IPv6 because they always start with FF.

9. Which of the following is true when describing a unicast address?

Packets addressed to a unicast address are delivered to a single interface. For load balancing, multiple interfaces can use the same address.

3. Which statement regarding private IP addresses is most accurate?

Private IP addresses are not routable over the Internet, as either source or destination addresses. Despite not being allowed on the Internet, private IP addresses are fully routable on private intranets.

21. What is the valid range used for a Class C private IP address?

The class C private range is 192.168.0.0 through 192.168.255.255.

10. A host is rebooted and you view the IP address that it was assigned. The address is 169.123.13.34. Which of the following happened?

The host received a public address. An APIPA address is 169.254.x.x. The host address in this question is a public address.

13. Which of the following is true when describing an anycast address?

This address identifies multiple interfaces, and the anycast packet is delivered to only addresses identify multiple interfaces, which is the same as multicast; however, the big difference is that the anycast packet is delivered to only one address: the first one it finds defined in terms of routing distance. This address can also be called One-To-One-Of-Many or One-to-Nearest.