Chapter 4 IP Address Planning and Management

The transition from IPv4 to IPv6 will be gradual and one approach that allows their coexistence is direct address conversion. In that approach, 123.45.67.89 (IPv4) becomes ____ for IPv6: A) 0000:0000:0000:0000:0000:ffff:123.45.67.89 B) 1111: 1111: 1111: 1111: 1111:ffff:123.45.67.89 C) 123.45.67.89: 0000:0000:0000:0000:0000:0000 D) 1111: 1111: 1111: 1111: 1111:0000:123.45.67.89 E) 123.45.67.89:1111: 1111: 1111: 1111: 1111:ffff

A) 0000:0000:0000:0000:0000:ffff:123.45.67.89

4. A class C network that uses 4 bits for the subnet ID can have up to ________ hosts in each subnet. A. 14 B. 12 C. 16 D. 65,000 E. 4

A. 14 2^4-2 =14

12. A firm has the network ID of 65.10.0.0 and the subnet mask of 255.255.0.0. What is the destination address of a packet to be broadcasted to all nodes in a subnet? A. 65.10.255.255 B. 65.0.255.255 C. 65.0.0.255 D. 65.10.255.0 E. 65.255.0.0

A. 65.10.255.255

6. Which term represents IPs used only internally at an organization? A. private IPs B. campus IPs C. internal IPs D. encoded IPs E. reserved IPs

A. private IPs

8. For a packet outgoing to the Internet, NAPT generally changes its A. source port number only. B. destination IP address only. C. destination and source IP addresses. D. source IP address and maybe source port number. E. destination IP address and maybe source port number.

A. source port number only.

1. Which organization allocates IP address blocks to large ISPs? A. Internet Assigned Numbers Authority B. Regional Internet Registry C. International Standard Organization D. Internet Engineering Task Force E. VeriSign

B. Regional Internet Registry

Think of a network, 192.168.125.x, with the following requirements: • Number of necessary subnets: 14 • Number of usable hosts per subnet: 14 14. For the subnet 192.168.125.16, what is the first usable host IP? A) 192.168.125.16 B) 192.168.125.17 C) 192.168.125.32 D) 192.168.125.20 E) 192.168.125.64

B.) 192.168.125.17

Think of a network, 192.168.125.x, with the following requirements: • Number of necessary subnets: 14 • Number of usable hosts per subnet: 14 15. For the subnet 192.168.125.32, what is the last usable host IP? A) 192.168.125.33 B) 192.168.125.46 C) 192.168.125.32 D) 192.168.125.47 E) 192.168.125.64

B.) 192.168.125.46 32+14= 46

22. Under the classful IP allocation scheme, Class B networks can use a maximum of _____ bits to indicate the host identification. A) 4 B) 8 C) 16 D) 24 E) 32

C) 16

18. Which host IPv4 address needs network address translation (NAT) to access the Internet? A) 123.7.86.215 B) 127.0.0.1 C) 192.168.0.1 D) 255.255.255.255 E) 127.127.127.1

C) 192.168.0.1

10. The network ID of an IP address, 10.7.12.6, is 10.7.0.0. The network plus subnet parts are ________. A. 10 B. 10.7 C. 10.7.12 D. 10.7.12.6 -? E. Cannot say

C. 10.7.12

2. What is the largest decimal value of the 8-bit octet? A. 100 B. 32 C. 255 D. 128 E. 256

C. 255

9. Imagine a network (175.140.x.x) that uses 8 bits for the subnet ID. If a computer releases a packet with 175.140.115.255 as the destination IP, what should happen? A. The packet is delivered to the host, 175.140.115.255. B. The packet is delivered to the host, 175.140.115.0. C. The packet is delivered to all hosts within the subnet, 175.140.115.0. D. The packet is delivered to all hosts within the network, 175.140.0.0. E. The packet is delivered to the host, 175.140.0.255.

C. The packet is delivered to all hosts within the subnet, 175.140.115.0.

Think of a network, 192.168.125.x, with the following requirements: • Number of necessary subnets: 14 • Number of usable hosts per subnet: 14 Assuming that the minimum number of bits is borrowed from the host ID part.. 13. What is the subnet mask of all subnets? A) 255.255.255.255 B) 255.255.255.64 C) 255.255.255.240 D) 255.255.255.192 E) 255.255.255.224

C.) 255.255.255.240 2^4 - 2 = 14 usable hosts per bit, subnet mask becomes 254-14 = 240

11. When a firm uses 8 bits for its network identification (or ID), what does the subnet mask 255.255.255.0 tell you? A. Eight bits are assigned to the subnet identification. B. Sixteen bits are available to uniquely identify a host station. C. Four bits are assigned to the subnet identification. D. Eight bits are used to indicate the host identification. E. No bits are available to create subnets.

D. Eight bits are used to indicate the host identification

5. When a packet is broadcasted to a target subnet that is different from the source host's subnet, it becomes ________ broadcasting. A. focused B. subset C. targeted D. directed E. limited

D. directed

3. The IP address should have AT LEAST ________ part(s). A. network ID B. host ID C. network ID and subnet ID D. network ID and host ID E. network ID, subnet ID, and host ID

D. network ID and host ID

Think of a network, 192.168.125.x, with the following requirements: • Number of necessary subnets: 14 • Number of usable hosts per subnet: 14 17. How many (usable) IP addresses are available for a subnet? A) 6 B) 10 C) 14 D) 15 E) 16

D.) 15

7. When the destination address of a packet is 255.255.255.255: A. The packet is delivered to all hosts on the Internet. B. The packet is delivered to all hosts of an enterprise network to which the source host belongs. C. The packet is delivered to all hosts of a multicasting network on the Internet. D. The packet is self-addressed and thus does not leave the source host. E. The packet is delivered to all hosts that are in the same subnet as the source host.

E. The packet is delivered to all hosts that are in the same subnet as the source host.

Think of a network, 192.168.125.x, with the following requirements: • Number of necessary subnets: 14 • Number of usable hosts per subnet: 14 16. For the subnet 192.168.125.128, what is the broadcast IP? A) 192.168.125.129 B) 192.168.125.240 C) 192.168.125.255 D) 192.168.125.15 E) 192.168.125.143

E.) 192.168.125.143