| 1. | B. The first thing that should be verified is that a shorter lease duration has not been configured. Because the number of IP addresses exceeds the number of DHCP clients, the lease duration can be increased. After that has been verified, you can begin using the other tools to troubleshoot the problem if it continues. Therefore answers A, C, and D are incorrect. After you have verified that the lease duration is properly configured, you can choose to follow up using one of the other options. |
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| 2. | C. If clients have not been configured with the IP address of the default gateway, they cannot access resources outside of their local subnet. Answer A is incorrect because the clients are already successfully leasing IP addresses from the server. Answer B would solve the problem but would not be the easiest solution; therefore, it is also incorrect. Answer D is incorrect because configuring the DNS server option allows clients to resolve hostnames but doesn't give them access outside of the local subnet. |
| 3. | C. If a DHCP server has not been authorized within Active Directory, it is considered to be a rogue server and the service will continue to shut down until it is authorized by a member of the Enterprise Admins group. Answers A, B, and D are incorrect because none of these problems would cause the DHCP service to shut down. |
| 4. | C. By creating a client reservation for each of the member servers, you ensure that they will always lease the same IP address from the DHCP server. Therefore, answers A, B, and D are incorrect. |
| 5. | B. To ensure that the IP address of the network interface printers did not change when the DHCP server was placed on the network, client reservation should have been defined. Answer A is incorrect because defining additional scopes does not address the problem. Answer C is incorrect because excluding the IP addresses means that the DHCP server will never offer them to DHCP clients. Answer D is incorrect because there is no such option in DHCP called a client exclusion. |
| 6. | B. Each subnet will have its own gateway, so the 003 router option should be configured at the scope level instead of the server level. Answers A and C are incorrect because all clients are successfully leasing IP addresses. Answer D is incorrect because DHCP options do not have to be activated. |
| 7. | B. To authorize DHCP servers throughout the forest, the user account that you log on with must be a member of the Enterprise Admins group. Therefore, answers A, C, and D are incorrect. |
| 8. | A. The correct order in which DHCP options are applied is server, scope, class, and then client. Therefore, answers B, C, and D are incorrect. |
| 9. | B. To ensure that the IP addresses of the UNIX servers are not leased to any DHCP clients, exclude the three IP addresses from the scope. Answer A is incorrect because client reservations are configured for the DHCP clients that need to lease the same IP address. Answer C is incorrect because placing the UNIX servers on a different subnet will have no affect on the IP addresses leased by the DHCP server. Answer D is incorrect because superscopes are created to support multinetted environments. |
| 10. | C. By configuring each DHCP server with a range of IP addresses from the remote subnet, you can provide some level of fault tolerance. Each server should be configured with 80% of the IP address for the local subnet and 20% of the IP address for the remote subnet, to avoid IP address conflicts. Answers A and B are incorrect because DHCP servers do not replicate, nor do they share scope information. Answer D is incorrect because clients are not configured with the IP address of DHCP servers. |
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| 11. | C. The subnet mask of 255.255.255.240 will allow for a maximum amount of 16 subnets. This will meet the requirements for 12 subnets. Answers A and B are incorrect because these subnet masks do not allow for enough subnets. Answer D is incorrect because this subnet mask allows for more subnets that will ever be required. It will also not allow for the required number of hosts per subnet. |
| 12. | A. You should increase the number of conflict detection attempts. By default this value is set to zero. When this value is increased, the DHCP server will ping an IP address before leasing it to a DHCP client. If the ping is successful, the DHCP server will not lease the IP address. Answer B is incorrect. You should not exclude the static IP addresses from the scope. This would require more administrative effort to identify the static IP addresses and then exclude them from the scope. Answer C is incorrect. You should not create client reservations. A client reservation is created when a DHCP client requires the same IP address. The DHCP server always leases the same IP addresses to the DHCP client. Answer D is incorrect. You should not alter the range of IP addresses in the scope because you do not know the IP addresses that are still statically configured on client computers. |
