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70-642 Config IP Addressing And Services

When you have a dedicated IP address you get less down time, remote access to your PC no wonder where you are and get to have your own private SL certificate. How knowledgeable are you at configuring IP addresses and...

Questions: 35 | Attempts: 121 | Last updated: Mar 27, 2024

Sample Question 1
Your organization consists of a single Windows Server 2008 Active Directory domain that is spread across two IP subnets. One DHCP server exists in the domain. You receive a complaint from a user that she is unable to access domain resources. You discover that her computer's IP address is 169.254.11.213. What action should you perform? A. Install a DHCP Relay Agent on the user's local subnet. B. Disable PXE on the user's computer. C. Enable traffic on TCP 1542 as a Windows Firewall exception on the user's computer. D. Install a WDS server on the user's local subnet.

A. Install a DHCP Relay Agent on the user's local subnet. ------ In Windows Server 2008, the DHCP Relay Agent service is installed as a service of the RRAS server role. The DHCP Relay Agent allows DHCP broadcast messages to cross router interfaces.

B. Disable PXE on the user's computer. ------ The Preboot Execution Environment (PXE) represents an alternate way for a device to obtain an IP address lease from DHCP. However, PXE does not factor into this scenario.

C. Enable traffic on TCP 1542 as a Windows Firewall exception on the user's computer. ------ DHCP Relay is defined in Request for Comments (RFC) 1542. Traditional DHCP traffic is not blocked by Windows Firewall due to its mission-critical nature.

D. Install a WDS server on the user's local subnet. ------ Windows Deployment Service (WDS) is an operating system deployment technology that relies upon DHCP. However, the WDS service itself will not allow DHCP Discover packets to cross router interfaces.

Sample Question 2
Your organization consists of an Active Directory domain in which all servers run Windows Server 2008 and all client computers are laptops that run Windows Vista with Service Pack 1. You need to configure TCP/IP on the laptops such that users are able to seamlessly connect to both the corporate network, which uses static IP addressing, and their own home networks, which use dynamic IP addressing. What action should you perform? A. Configure the users with IPv6 addresses. B. Configure the users' computers with APIPA IP addresses. C. Use the Alternate Configuration feature to configure the laptop computers with static primary IP addresses. D. Use the Alternate Configuration feature to configure the laptop computers with a static secondary address.

A. Configure the users with IPv6 addresses. ------ We must be careful never to make assumptions on IT certification exams. Because the scenario says nothing about an IPv6 deployment, we can safely determine that we are using the current industry standard, which is IPv4.

B. Configure the users' computers with APIPA IP addresses. ------ Automatic Private IP Addressing (APIPA) addresses, which exist in the range 169.254.X.Y, are invoked automatically whenever a DHCP client is unable to reach a DHCP server. APIPA addresses won't work for the users when they are at home.

C. Use the Alternate Configuration feature to configure the laptop computers with static primary IP addresses. ------ The primary connection method for LAN adapters must be set for DHCP to have the ability to use a static configuration as an alternate configuration.

D. Use the Alternate Configuration feature to configure the laptop computers with a static secondary address. ------ If the primary (DHCP) configuration fails, then the alternate configuration (either APIPA or static addressing) takes over.

Sample Question 3
Your organization uses the IPv4 network address 172.16.30.0/22. All client computers in the domain run Windows Vista. HostA (IP address 172.16.8.111, subnet mask 255.255.252.0) is unable to connect to HostB (IP address 172.16.12.23, subnet mask 255.255.252.0) when using NetBIOS broadcasts. What is the most likely explanation of the problem? A. The network's DHCP server is offline. B. HostA and HostB are using an incorrect subnet mask. C. HostA and HostB reside on different IP subnets. D. HostA and HostB are using different default gateway addresses.

A. The network's DHCP server is offline. ------ The scenario does not state if these hosts are statically or dynamically assigned their IP addresses. However, if a DHCP server were unavailable then the default behavior would be for each machine to auto-generate APIPA addresses.

B. HostA and HostB are using an incorrect subnet mask. ------ The decimal subnet mask 255.255.252.0 (22 bits) is correct.

C. HostA and HostB reside on different IP subnets. ------ HostA belongs to subnet ID 172.16.8.0, and HostB belongs to subnet ID 172.16.12.0.

D. HostA and HostB are using different default gateway addresses. ------ These two hosts SHOULD be using different default gateway addresses, as their IP network addresses are different. Remember that routers typically discard NetBIOS broadcast traffic, which accounts for why the hosts are unable to communicate by using this method.