ITT Tech

NT 1210

Chapter 8

1)Which of the following answers describes the TCP/IP network layer? a. Provides end-to-end routing b. Focused on operations that occur on IP hosts c. Defines physical operations rather than logical d. Defines LAN and WAN operations

2. Which of the following answers are IP routing protocols that dynamically learn IP routes on behalf of IP routers? (Choose two answers.) a. DHCP b. EIGRP c. ARP d. OSPF

3. Which of the follow answers list a function related to TCP/IP network layer tasks, but the task is not defined as part of IP? (Choose two answers.) a. Discovering the IP address of another host based on that other host’s text name b. Discovering the MAC address of another host based on the other host’s IP address c. Connecting LANs and WANs using routers d. Defining a 32-bit address used to identify hosts in the network
4. Host 1, with IP address 1.2.3.4, sends an IP packet to Host 2, whose IP address is 5.6.7.8. Which of the following answers is true about the IP address information in the IP header of the packet? a. The IP header list Host 2’s IP address, but not Host 1’s IP address. b. The IP header lists the text character code for 5, 6, 7, and 8 to represent the destination IP address. c. The IP header lists the binary version of 1.2.3.4 as the source IP address. d. The header lists the text character code for the entire destination address 5.6.7.8, including the dots.
5. A user at PC1 opens a web browser and types in a URL that lists the name of a server (Server1). PC1 has never tried to send an IP packet to Server1. Which of the following protocols will PC1 need to use before PC1’s browser can successfully see the web page from the server? a. DHCP b. DNS c. OSPF d. EIGRP

6. A user at PC1 opens a web browser and types in a URL that lists the IP address of a server to which PC1 wants to connect (address 1.1.1.1). The TCP/IP network has many IP routers, with many different physical paths. PC1 sits several routers away from the server with IP address 1.1.1.1. Which of the following protocols could impact which path the packets from PC1 to the server take? (Choose two answers.) a. DHCP b. OSPF c. ARP

d. RIP

7. Which of the following answers are true about an IPv4 address class and the type of IPv4 addresses in that class? (Choose two answers.) a. Class B: Experimental IP addresses b. Class D: Multicast IP addresses c. Class E: Unicast IP addresses d. Class C: Unicast IP addresses
8. Which of the following answers lists a number that, based on the value in the first octet, fits into the address class listed in that same answer? a. 100.1.1.1, class A b. 128.1.1.1, class A c. 191.1.1.1, class C d. 192.1.1.1, class B
9. The size of a classful IP network can be defined as the number of IP addresses in the IP network. Which of the following answers lists a true statement about the sizes of class A, B, and C networks? a. Class A are

smaller than class C. b. Class C are smaller than class B. c. Class B are larger than class A. d. Class B and C are the same size.

10. A user has configured the IP settings on his PC using static configuration. Which of the following answers lists something not typically set as part of the IP settings on a host? a. The MAC address of the default router b. The IP address(es) of the DNS server(s) c. The subnet mask d. The host’s own IP address
11. PC1 and PC2 sit on the same LAN and subnet. The subnet ID is 1.1.1.0, and the subnet includes all numbers from 1.1.1.0 to 1.1.1.255. PC1 has been statically configured with IP address 1.1.1.1. PC2 now tries to lease an IP address using DHCP. What prevents PC2 from getting address

1.1.1.1 in the DHCP lease?. The DHCP server uses DHCP messages to discover that PC1 has 1.1.1.1 as a statically configured IP address; then the DHCP server will not lease 1.1.1.1 to PC2. b. There is no guarantee possible; DHCP should not be used if static configuration is also allowed. c. The DHCP server should omit 1.1.1.1 from its list of addresses that it can consider for a DHCP lease. d. The DHCP server must be configured with the option to lease only even-numbered IP addresses.

12. The following answers each list one IP address and a possible IP network ID. Which answers show the correct network ID with its IP address? (Choose two answers.) a. 19.19.19.19: Network ID 19.0.0.0 b. 200.200.200.200: Network ID 200.200.0.0 c. 100.100.100.100: Network ID 100.100.0.0 d. 192.192.192.192: Network ID 192.192.192.0
13. Host 1 sends an IP packet to Host 2. The IP packet passes through Routers R1, R2, and R3. When R1 forwards the IP packet, R1 matches a particular IP route in its routing table. Which parts of the route had something to do with the router’s logic in matching this IP route? (Choose two answers.) a. Network/subnet ID b. Next-hop router c. Outgoing interface d. Subnet mask
14. A network engineer takes a class A network (10.0.0.0) and begins to create a subnetting plan. He chooses a plan in which all the subnets are the same size. Which of the following options would be allowed? (Choose two answers.) a. In each subnet, the first 2 octets of each address must have the same value. b. In each subnet, the last 2 octets of each address must have the same value. c. In each subnet, the first 22 bits of each

address must have the same value. d. In each subnet, the last 22 bits of each address must have the same value.

15. PC1 connects to a LAN, listing Router R1 as its default router. PC1 wants to send an IP packet to 1.1.1.1. Which of the following answers is true about how PC1 chooses to forward this packet? a. PC1 always sends the packet to R1 (default router) next. b. PC1 runs a dynamic routing protocol and matches its IP routing table, much like a router. c. PC1 first determines whether the destination is on the same subnet as PC1 and only sends the packet to R1 if the destination is in another subnet. d. PC1 will ARP looking for 1.1.1.1’s MAC address, no matter what.
16. In the following figure, PC12 sends an IP packet to PC22. The IP packet completes the trip from PC12 to PC22. Which of the following answers list the correct location and addresses used as this packet crosses the network from PC12 to PC22? (Choose two answers.)

IP = 172.25.11.12 IP = 172.25.22.21 IP = 172.25.11.9 S0 S1 F0F1 IP = 172.25.22.22

IP = 172.25.22.9

12

R1 R2 21

22

a. On the LAN on the left, the source MAC address is PC12’s MAC address. b. On the LAN on the right, the source MAC address is PC12’s MAC address. c. On the LAN on the right, the destination IP address is 172.25.22.22. d. On the LAN on the left, the destination MAC address is PC22’s MAC address.

17. In the following figure, PC12 sends an IP packet to PC22. The IP packet completes the trip from PC12 to PC22, and PC22 sends a reply packet back to PC21. Focusing on the packet from PC22 back to PC21, which of the following answers list the correct location and addresses used as this packet crosses the network? (Choose two answers.)

IP = 172.25.11.12 IP = 172.25.22.21 IP = 172.25.11.9 S0 S1 F0F1 IP = 172.25.22.22

IP = 172.25.22.9

12

R1 R2 21

22

a. On the LAN on the left, the source MAC address is PC22’s MAC address. b. On the LAN on the right, the destination MAC address is R2’s MAC address. c. On the LAN on the right, the destination IP address is 172.25.22.9. d. On the LAN on the left, the destination MAC address is PC12’s MAC address.

18. Hosts PC1, PC2, PC3, and PC4 all sit on the same LAN subnet, along with Router R1. PC1 needs to send an IP packet to PC2. Imagine that none of the devices know any of the other device’s MAC addresses yet. Which of the following messages will flow as a result of PC1 needing to send the packet to PC2? a. An ARP Broadcast from PC2 b. An ARP Reply from R1

c. An ARP Request from PC1 d. An ARP Reply from all devices except PC1

19. PC1, PC2, and Router R1 all connect to the same LAN. PC1 and PC2 list R1 as their default router. PC1 sends an IP packet to PC2. PC1’s ARP table was empty before starting this particular test. Which of the following would happen in this case? (Choose two answers.) a. PC1 would send the IP packet, inside an Ethernet frame, to R1 next. b. PC1 will send an ARP Request, looking for PC2’s MAC address. c. PC1 would send the IP packet, inside an Ethernet frame, to PC2 next. d. PC1 will send an ARP Request, looking for R1’s MAC address.
20. PC1 sends an IP packet to PC2. PC1 sits on a LAN. PC1 sends an Ethernet frame, with the IP packet for PC2 encapsulated inside the frame,