Chapter 3: IP Addressing and VLSM

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1 Chapter 3: IP Addressing and VLSM QUESTION 54 What is the principle reason to use a private IP address on an internal network? A. Subnet strategy for private companies. B. Manage and scale the growth of the internal network. C. Conserve public IP addresses so that we do not run out of them. D. Allow access reserved to the devices. QUESTION 55 Which IP address can be assigned to an Internet interface? A B C D QUESTION 56 What will happen if a private IP address is assigned to a public interface connected to an ISP? A. Addresses in a private range will be not routed on the Internet backbone. B. Only the ISP router will have the capability to access the public network. C. The NAT process will be used to translate this address in a valid IP address. D. Several automated methods will be necessary on the private network. E. A conflict of IP addresses happens, because other public routers can use the same range. QUESTION 57 When is it necessary to use a public IP address on a routing interface? A. Connect a router on a local network. B. Connect a router to another router. C. Allow distribution of routes between networks. D. Translate a private IP address. E. Connect a network to the Internet. QUESTION 70 Refer to the exhibit. Which VLSM mask will allow for the appropriate number of host addresses for Network A? A. /25 B. /26 C. /27 D. /28

2 QUESTION 71 Refer to the exhibit. Which subnet mask will place all hosts on Network B in the same subnet with the least amount of wasted addresses? A B C D QUESTION 73 Refer to the exhibit. Which mask is correct to use for the WAN link between the routers that will provide connectivity while wasting the least amount of addresses? A. /23 B. /24 C. /25 D. /30 QUESTION 80 On the network /27, what is the last IP address that can be assigned to a host? A B C D QUESTION 81 The ip subnet zero command is not configured on a router. What would be the IP address of Ethernet0/0 using the first available address from the sixth subnet of the network /29? A B C D

3 QUESTION 82 For the network /23, which option is a valid IP address that can be assigned to a host? A B C D QUESTION 83 How many addresses for hosts will the network /22 provide? A. 510 B C D QUESTION 90 When a DHCP server is configured, which two IP addresses should never be assignable to hosts? (Choose two.) A. network or subnetwork IP address B. broadcast address on the network C. IP address leased to the LAN D. IP address used by the interfaces E. manually assigned address to the clients F. designated IP address to the DHCP server QUESTION 100 The network default gateway applying to a host by DHCP is /28. Which option is the valid IP address of this host? A B C D E QUESTION 101 Which two addresses can be assigned to a host with a subnet mask of ? (Choose two.) A B C D E QUESTION 102 The network administrator has asked you to check the status of the workstation's IP stack by pinging the loopback address. Which address would you ping to perform this task? A B C D

4 QUESTION 103 Workstation A has been assigned an IP address of /28. Workstation B has been assigned an IP address of /28. The two workstations are connected with a straight-through cable. Attempts to ping between the hosts are unsuccessful. What two things can be done to allow communications between the hosts? (Choose two.) A. Replace the straight-through cable with a crossover cable. B. Change the subnet mask of the hosts to /25. C. Change the subnet mask of the hosts to /26. D. Change the address of Workstation A to E. Change the address of Workstation B to QUESTION 104 Your ISP has given you the address /29 to assign to your router's interface. They have also given you the default gateway address of After you have configured the address, the router is unable to ping any remote devices. What is preventing the router from pinging remote devices? A. The default gateway is not an address on this subnet. B. The default gateway is the broadcast address for this subnet. C. The IP address is the broadcast address for this subnet. D. The IP address is an invalid class D multicast address. QUESTION 149 Refer to the exhibit. Which value will be configured for Default Gateway of the Local Area Connection? A B C D

5 QUESTION 157 Which of the following host addresses are members of networks that can be routed across the public Internet? (Choose three.) A B C D E F QUESTION 158 Given a subnet mask of , which of the following addresses can be assigned to network hosts? (Choose three.) A B C D E F QUESTION 169 A national retail chain needs to design an IP addressing scheme to support a nationwide network. The company needs a minimum of 300 sub-networks and a maximum of 50 host addresses per subnet. Working with only one Class B address, which of the following subnet masks will support an appropriate addressing scheme? (Choose two.) A B C D E F QUESTION 170 Given the address /28, which of the following are valid host addresses on this subnet? (Choose two.) A B C D E QUESTION 178 Which of the following IP addresses fall into the CIDR block of /22? (Choose three.) A B C D E F

6 QUESTION 198 Which of the following describe private IP addresses? (Choose two.) A. addresses chosen by a company to communicate with the Internet B. addresses that cannot be routed through the public Internet C. addresses that can be routed through the public Internet D. a scheme to conserve public addresses E. addresses licensed to enterprises or ISPs by an Internet registry organization QUESTION 206 The network has been divided into eight equal subnets. Which of the following IP addresses can be assigned to hosts in the third subnet if the ip subnet-zero command is configured on the router? (Choose three.) A B C D E F QUESTION 223 Refer to the exhibit. All of the routers in the network are configured with the ip subnet-zero command. Which network addresses should be used for Link A and Network A? (Choose two.) A. Network A /26 B. Network A /25 C. Network A /26 D. Link A /30 E. Link A /30 F. Link A /30 QUESTION 224 Which two subnetworks would be included in the summarized address of /20? (Choose two.) A /30 B /30 C /18 D /22 E /22 F /18

7 QUESTION 227 Which three IP addresses can be assigned to hosts if the subnet mask is /27 and subnet zero is usable? (Choose three.) A B C D E F QUESTION 271 Which of the following IP addresses can be assigned to the host devices? (Choose two.) A /27 B /23 C D E /28 F /13 QUESTION 349 How many subnets can be gained by subnetting /23 into a /27 mask, and how many usable host addresses will there be per subnet? A. 8 subnets, 31 hosts B. 8 subnets, 32 hosts C. 16 subnets, 30 hosts D. 16 subnets, 32 hosts E. A Class B address can't be subnetted into the fourth octet.

8 Answer 54: C Answer Key Answer 55: B Answer 56: A Answer 57: E Answer 70: A Answer 71: B Answer 73: D Answer 80: A Answer 81: C Answer 82: B Answer 83: B Answer 90: AB Answer 100: C Answer 101: BD Answer 102: B Answer 103: AB Answer 104: B Answer 105: B Answer 157: CEF Answer 158: BCD Answer 169: BE Answer 170: AC Answer 178: BCE Answer 198: BD Answer 206: ACD Answer 223: BD Answer 224: DE Answer 271: BF Answer 227: ACD

9 Answer 349: C

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