Chapter 04: 4.4.10 Practice Questions

Which of the following strategies do we use to prevent duplicate IP addresses from being used on a network? (Select two.) - Set the Windows Network Monitoring utility to identify potential IP conflicts. - Configure a HOSTS file for local IP resolution. - Install a DHCP server on the network. - Configure client systems to use static IP assignment. - Use Automatic Private IP Addressing (APIPA).

- Install a DHCP server on the network. - Use Automatic Private IP Addressing (APIPA). Explanation: To avoid duplicate IP addresses being used by network systems, utilize automatic IP assignment. Both the DHCP service and APIPA can automatically assign addresses to client systems. Clients configured to use static IP addressing may inadvertently have duplicate IP addresses assigned to them. In such a case, one of the systems won't be able to log onto the network.

Which of the following statements about Dynamic Host Configuration Protocol (DHCP) are true? (Select two.) - IP addresses cannot be excluded from a range of delivered addresses. - It can deliver other configuration information in addition to IP addresses. - It is only used to deliver IP addresses to hosts. - It cannot be configured to assign the same IP address to the same host each time it boots. - A DHCP server assigns addresses to requesting hosts.

- It can deliver other configuration information in addition to IP addresses. - A DHCP server assigns addresses to requesting hosts. Explanation: DHCP servers deliver IP addresses as well as other host configuration information to network hosts. DHCP can be configured to assign any available address to a host, or it can assign or exclude a specific address on a specific host.

When a device renews its DHCP lease, which two steps in the DHCP process are skipped? - Offer - Renew - ACK - Request - Discover

- Offer - Discover Explanation: When a new device connects to a network, a four-step process is used to obtain the IP configuration from the DHCP server. The four steps in the process are: Discover, Offer, Request, and Acknowledge. The DHCP renewal process occurs when there is 50 percent remaining on the device's lease time. This process skips the DHCP Discover and DHCP Offer steps. The client sends the DHCP request packet to the server, which responds with the DHCP Ack packet and renews the IP configuration.

After you install a new DHCP server on your network, you need to verify that the network devices are receiving IP addressing via DHCP. You reboot a Windows 10 client system and, using the ipconfig /all command, receive the following information: Ethernet adapter Local Area Connection 1:Description . . . . . . . . . . . : Intel(R) Ethernet ConnectionPhysical Address. . . . . . . . . : 02-00-4C-4F-3F-50DHCP Enabled. . . . . . . . . . . : YesAutoconfiguration Enabled . . . . : YesAutoconfiguration IPv4 Address. . : 169.254.25.129Subnet Mask . . . . . . . . . . . : 255.255.0.0Default Gateway . . . . . . . . . :DNS Servers . . . . . . . . . . . : Which of the following statements are true? (Select two). - The network is configured to use static IP addressing. - DHCP is disabled on the client system. - The client system is unable to reach the DHCP server. - The default gateway address needs to point to the DHCP server.

- The client system is unable to reach the DHCP server. - The client system is configured to use DHCP. Explanation: A system configured as a DHCP client will attempt to locate a DHCP server during the boot process. If the client system is unable to locate the DHCP server and obtain IP information, an APIPA address is used. The client also configures itself with a Class B subnet mask of 255.255.0.0. The output from the ipconfig command shows that the client system has been configured to receive IP information from a DHCP server. As such, the client system attempted to locate the DHCP server. When it couldn't, it received the APIPA address of 169.254.25.129 and a subnet mask of 255.255.0.0. The default gateway does not have to be present to access a DHCP server.

At what percentage of the device's lease time does the DHCP renewal process occur? - At thirty percent - At fifty percent - At sixty percent - At forty percent

At fifty percent Explanation: The DHCP renewal process occurs when fifty percent of the device's lease time has expired.

You have a TCP/IP network with 50 hosts. There have been inconsistent communication problems between these hosts. You run a protocol analyzer and discover that two of them have the same IP address assigned. Which protocol can you implement on your network to help prevent problems such as this? - SNMP - DHCP - IGMP - TCP

DHCP Explanation: You can use Dynamic Host Configuration Protocol (DHCP) to set up a DHCP server that will assign IP addresses automatically to network hosts. DHCP servers do not assign the same IP address to two different hosts. TCP provides services that ensure accurate and timely delivery of network communications between hosts. SNMP (Simple Network Management Protocol) lets network hosts exchange configuration and status information. IGMP (Internet Group Management Protocol) defines host groups.

You have a network with 50 workstations. You want to automatically configure the workstations with the IP address, subnet mask, and default gateway values. Which device should you use? - Router - DNS server - Gateway - DHCP server

DHCP server Explanation: Use a DHCP server to deliver configuration information to hosts automatically. Using DHCP is easier than configuring each host manually. Use a gateway to provide access to a different network or a network that uses a different protocol. Use a router to connect multiple subnets. Use a DNS server to provide name resolution (for example, to get the IP address associated with a logical hostname).

You've configured your organization's DHCP server to dynamically assign IP addresses to DHCP clients using a lease duration of four days. You're using a Windows server for DHCP, and the default lease time is eight days. What impact, if any, will this have on the network? - Decreased network traffic - Router performance will improve - Increased network traffic - Network bandwidth will increase - No impact

Increased network traffic Explanation: Decreasing lease time does slightly increase network traffic because clients have to continually renew their IP addresses. But decreasing the lease time also allows more effective address use. There is no correlation to bandwidth increase or router performance increase.

Which of the following DHCP scope options assigns a static IP configuration to a device using that device's MAC address? - Reservation - Exclusion - Default gateway - IP range

Reservation Explanation: Reservations are static IP addresses that are not dynamically assigned by the DHCP server. Reservations are assigned by the DHCP server using the device's MAC address. Whenever the device with the specified MAC address connects to the network, the DHCP server assigns it the reserved static IP configuration. Exclusions are IP addresses that the DHCP server does not assign. The IP range defines the range of IP addresses that the DHCP server can assign. The default gateway defines where data packets that are leaving the network should go.

Due to wide network expansion, you've decided to upgrade your network by configuring a DHCP server. The network uses Linux, Windows, and Mac OS X client systems. You configure the server to distribute IP addresses from 192.168.2.1 to 192.168.2.100. You use the subnet mask of 255.255.255.0. After you make all the setting changes on the DHCP server, you reboot each client system, but they are not able to obtain an IP address from the DHCP server. Which of the following explains the failure? - You must reboot the DHCP server. - DHCP does not function in a heterogeneous computing environment. - 192.168.x.x requires a Class C subnet mask. - You must configure the clients to obtain IP addressing from a DHCP server.

You must configure the clients to obtain IP addressing from a DHCP server. Explanation: Once a DHCP server has been configured for the network, each client system has to be told to look for the server to obtain an IP addressing. Selecting DHCP to obtain IP addressing information is typically as easy as selecting a radio button. If the client is not set to DHCP, it will look for a statically assigned IP address. The DHCP service is supported by all major operating systems today. Using DHCP among different client systems would not be a problem. Rebooting the DHCP server would not be helpful if the client systems aren't configured to use the DHCP service.