Module Five TestOut Practice Questions
Assuming the network is indicated by the default portion of the IP address, which three of the following IP addresses belong to the Class A network 114.0.0.0? (select three). -114.58.12.0 -115.0.0.66 -114.0.0.15 -114.122.66.12 -115.88.0.55 -115.77.89.4
-114.58.12.0 -114.0.0.15 -114.122.66.12 (5.1.10) With a Class A network, the first octet indicates the network address. All hosts on the network must have the same value in the first octet (114).
Which of the following services automatically creates and deletes host records when an IP address lease is created or released? -DHCP Relay -Dynamic DNS -Dynamic NAT -Forward lookup
Dynamic DNS (5.5.9) Dynamic DNS (DDNS) enables clients or the DHCP server to update records in the zone database automatically whenever an IP address lease is created or renewed. A forward lookup is the process of resolving a host name to an IP address. A DHCP relay is used to forward DHCP requests to a DHCP server in a different subnet. Dynamic NAT is used to automatically map internal IP addresses with a dynamic port assignment.
You have a workstation connected to a small branch network using a single switch. The network does not have any routers and is not connected to the internet. What are the minimum configuration parameters required on the workstation to be able to communicate with all hosts on the network? -IP address and default gateway -IP address -IP address, subnet mask, and default gateway -IP address and subnet mask
IP address and subnet mask (5.1.10) On a single subnet, you only need to configure an IP address and a subnet mask. The default gateway identifies the router address used to reach remote networks. You would only use the default gateway if the network was connected to another subnet or the internet.
You recently created a new network segment for the development department. Because the hosts are now on a different network segment, they can no longer contact the DHCP server. Both network segments are connected via a Cisco router. Which of the following would be the best action to take in order to fix the problem? -Configure the router to forward broadcast messages -Move the DHCP server to the new network segment. -Install and configure a new DHCP server on the development network segment. -Implement an IP helper address on the router
Implement an IP helper address on the router (5.1.10) When an IP helper address is implemented on the Cisco router, DHCP broadcasts are forwarded to the specified IP address of the DHCP server. This allows hosts in a different network segment to contact the DHCP server. Installing and configuring a new DHCP would work, but it would not be the best solution. A new DHCP server would introduce additional costs and management overhead. Configuring the router to forward broadcast messages exposes the network to denial-of-service attacks. Moving the DHCP server would introduce the same problem to hosts in the other network segment.
Which of the following is the last IP address that can be assigned to hosts on the 166.60.0.0 network using the default subnet mask? -166.71.0.0 -166.70.255.254 -166.70.0.254 -166.70.0.255 -166.70.255.255
-166.70.255.254 (5.1.10) The last address you can assign to hosts on the 166.70.0.0 network is 166.70.255.254. The network address is a Class B address and uses a default subnet mask of 255.255.0.0. The last two octets are used for host addresses. 166.70.0.0 cannot be used as a host address because it is the network address. 166.70.255.255 cannot be used a a host address because it is the broadcast address.
You've decided to use a subnet mask of 255.255.192.0 on the 172.17.0.0 network to create four separate subnets. Which network IDs will be assigned to these subnets in this configuration? (Select two.) -172.17.32.0 -172.17.128.0 -172.17.16.0 -172.17.96.0 -172.17.0.0
-172.17.128.0 -172.17.0.0 (5.1.10) The subnet mask used for the 172.17.0.0 network can be viewed in binary notation as 11111111.11111111.11000000.00000000. Because the first two bits of the third octet are used for the network portion of the address , four subnets are possible: -172.17.0.0 -172.17.64.0 -172.17.128.0 -172.17.192.0
Your network has been assigned the Class B network address of 179.113.0.0. Which three of the following addresses can be assigned to hosts on your network? -180.113.0.67 -179.113.0.118 -179.113.89.0 -179.112.95.64 -179.114.88.0 -179.113.65.12 -179.113.0.0
-179.113.0.118 -179.113.89.0 -179.113.65.12 (5.1.10) All hosts on this network must share the first two octets of the IP address (179.113).
Your network has been assigned the Class C network address 200.78.151.0. Which of the following address can be assigned to hosts on your network? (Select three.) -200.78.151.111 -200.78.151.0 -200.78.151.255 -200.78.151.252 -200.78.152.14 -200.78.151.257 -200.78.151.12
-200.78.151.111 -200.78.151.252 -200.78.151.12 (5.1.10) All hosts on this network must share the first three octets of the IP address (200.78.151).
Which of the following terms are often synonymous with or made possible with CIDR? (Select two.) -NAT -Classful -Classless -VLSM -OSPF
-Classless -VLSM (5.1.10) Classless inter-domain routing (CIDR) allows non-default subnet masks (variable-length subnet masks, or VLSMs). Routers use the following information to identify networks: -The beginning network address in the range. -The number of bits used in the subnet mask. For example, the subnet 199.70.0.0 with a mask of 255.255.0.0 is represented as 199.70.0/16 (16 being the number of 1 bits in the subnet mask).
You have a small network, as shown in the Exhibit. You have configured the IP address and subnet mask on Wrk1. You want to be able to use Wrk1 to browse the internet to connect to sites like www.cisco.com Which other parameters are required on the workstation? (Select two.) -WINS server address -DHCP server address -DNS server address -Host name -Default gateway
-DNS server address -Default gateway (5.1.10) To access a remote network, the workstation must be configured with a default gateway address. In addition, it must be configured with one or more DNS server addresses. The DNS server address is used to contact a DNS server and find the IP address of hosts using names such as www.sisco.com.
Which of the following strategies are used to prevent duplicate IP addresses being used on a network? (Select two.) -Configure client systems to use static IP assignment. -Install the DHCP client on all workstations. -Install a DHCP server on the network. -Configure a HOSTS file for local IP resolution -Use Automatic Private IP Addressing. -Set the Windows network-monitoring utility to identify potential IP conflicts.
-Install a DHCP server on the networks -Use Automatic Private IP Addressing (5.3.10) To avoid duplicate IP addresses being used by network systems, automatic IP assignment is used. 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 will not be able to log on to the network.
Which two of the following statements about the dynamic host configuration protocol (DHCP) are true? -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 -It can deliver other configuration information in addition to IP addresses. -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 (5.3.10) 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 a specific address to a specific host.
If dynamic DNS is being used, which of the following events will cause a dynamic update of the host records? (Select two.) -The DHCP server renews an IP address lease. -A CNAME record is added to the DNS server. -The ipconfig/registerdns command is entered on a workstation -The browser cache on a workstation is cleared -An MX record is added to the DNS server
-The DHCP server renews an IP address lease -The ipconfig/registerdns command is entered on a workstation. (5.5.9) DDNS enables clients or the DHCP server to update records in the zone database automatically. Dynamic updates occur when: *A network host's IP address is added, released, or changed *The DHCP server changes or renews an IP address lease *The client's DNS information is manually changed using the ipconfig/registerdns command.
After installing a new DHCP server on the network, you needto verify that 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.Connection Physical Address...:02-00-4C-4F-3F-50 DHCP Enabled... : Yes Autoconfiguration Enabled... : Yes Autoconfiguration IPv4 address. 169.254.25.129 Subnet Mask...: 255.255.0.0 Default Gateway...: DNS Servers...: //////////////////////////// Which of the following statements are true? (Select two). -The default gateway address needs to point to the DHCP server -The client system is configured to use DHCP -The network is configured to use static IP addressing. -The client system is unable to reach the DHCP server. -DHCP is disabled on the client system. -The network subnet mask is incorrect.
-The client system is configured to use DHCP. -The client system is unable to reach the DHCP server (5.3.10) 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 assigned address will be used. The client also configured 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, 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.
A host on the network has an IP address of 129.11.99.78 using the default subnet mask. How would you identify the address and mask using CIDR notation? -129.11.99.78/24 -129.11.99.78:16 -129.11.99.78:24 -129.11.99.78:8 -129.11.99.78/16 -129.11.99.78/8
129.11.99.78/16 (5.1.10) Use 129.11.99.78/16 for the address and the mask. With CIDR notation, follow the IP address with a slash and the number of bits in the mask. The default subnet mask for this address is 255.255.0.0, which uses 16 bits in the mask.
You manage a server that uses an IP address of 192.168.255.188 with a mask of 255.255.0.0. Which of the following describes the address type? -Public -Classful -Multicast -Classless -Broadcast
Classless (5.1.10) Because the IP address is not using the default subnet mask, it is using classless addressing. Classless addressing modifies the length of the subnet mask, using a custom mask value instead of the default subnet mask.
You have a TCP/IP network with 50 hosts. There have been inconsistent communication problems between hosts. You run a protocol analyzer and discord that two hosts have the same IP address assigned. Which protocol can you implement on your network to help prevent problems such as this? -IP -ICMP -IGMP _SNMP -TCP -DHCP
DHCP (5.3.10) You can use the dynamic host configuration protocol (DHCP) to set up a DHCP server that will assign IP addresses automatically to network hosts. DHCP servers will not assign the same IP address to two different hosts.
You have a network with 50 workstations. You want to automatically configure workstations with the IP address, subnet mask, and default gateway values. Which device should you use? -Router -DNS server -Gateway -DHCP server
DHCP server (5.3.10) 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 NS server to provide name resolution (for example, to get the IP address associated with a logical host name.)
You want to implement a protocol on your network that allows computers to find the IP address of a host from a logical name. Which protocol should you implement? -DHCP -Telnet -DNS -ARP
DNS (5.5.9) DNS is a system that is distributed throughout the internetwork to provide address/name resolution. For example, www.mydomain.com would be identified with a specific IP address. ARP is a protocol for finding the IP address from a known MAC address. DHCP is a protocol used to assign IP addresses to hosts. Telnet is a remote management utility.
You need to enable hosts on your network to find the IP address of logical names such as srv1.myserver.com. Which device would you use? -IDS -Load balancer -Bandwidth shaper -DNS server -IPS
DNS server (5.5.9) Use a DNS server to provide host-name-to-IP-address resolution
Your Windows DHCP server had a default lease time of eight days. However, you have decided to reconfigure the DHCP server to dynamically assign IP addresses to DHCP clients using a lease duration of four days. What impact, if any, will this have on the network? -Network bandwidth will increase -Decreased network traffic -Increased network traffic -No impact -Router performance will improve
Increased network traffic (5.3.10) Decreasing lease time does slightly increase network traffic because clients will have to renew their IP addresses more often. However, decreasing the lease time also makes it so that you use your addresses more efficiently. There is no correlation to bandwidth increase or router performance increase.
Listed below are several DNS record types. Match the record type on the left with its function on the right. LEFT: RIGHT: -Points a host name to an IPv4 address -Provides alternate names to hosts that already have a host record -Points an IP address to a host name -Points a host name to an IPv6 address -Identifies servers that can be used to deliver mail
Points a host name to an IPv4 address -A Provides alternate names to hosts that already have a host record. -CNAME Points an IP address to a host name. -PTR Points a host name to an IPv6 address -AAAA Identifies servers that can be used to deliver mail -MX (5.5.9) *The A record maps an IPv4 (32 bit) DNS host name to an IP address. This is the most common resource record type. *The AAAA record maps an IPv6(128 bits) DNS host name to an IP address *The PTR record maps an IP address to a host name (in a manner of speaking, it points to an A record). *The MX record identifies servers that can be used to deliver email *The CNAME record provides alternate names (or aliases)_ to hosts that already have a host record. Using a single A record with multiple CNAME records means that when the IP address changes, only the A record needs to be modified.
Which of the following best describes the purpose of using subnets? -Subnets place each device within its own collision domain. -Subnets let you connect a private network to the internet -Subnets divide an IP network address into multiple network addresses. -Subnets combine multiple IP network addresses into one network address.
Subnets divide an IP network address into multiple network addresses. (5.1.10) This allows you to have several smaller networks while using only one network address.
You manage a subnet that uses the subnet address 198.162.1.0/23. Which of the following best describe show addressing is configured for the subnet? -Private -Subnetting -Supernetting -Classful
Supernetting (5.1.10) The subnet address 198.162.1.0/23 is an example of a supernetted address. With supernetting, multiple smaller subnets are combined into a single larger subnet. Supernetting is performed by taking the default subnet mask and making it smaller (using less bits). For this address, the default subnet mask uses 24 bits (255.255.255.0). With supernetting, the mask is altered to use only 23 bits (255.255.254.0) to combine multiple subnets together.
You have a small network connected to the internet as shown in the Exhibit. You need to configure the default gateway address on Wrk1 so that it can communicate with hosts on the internet. Which address would you use for the default gateway address? -The IP address assigned to Fa0/1 on Router1 -The IP address assigned to Fa0/0 on Router2 -The IP address assigned to Fa0/0 on Router 1 -The IP address assigned to Fa0/1 on Router2 -The IP address assigned to Switch A
The IP address assigned to Fa0/0 on Router1 (5.1.10) Explanation here...
Due to widespread network expansion, you have decided to upgrade the 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 making all 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 would explain the failure? -DHCP does not work in a heterogeneous computing environment unless the DHCP Samba client software is installed. -192.168.x.x requires a class C subnet mask. -DHCP does not function in a heterogeneous computing environment. -The DHCP server must be rebooted. -The clients must be configured to obtain IP addressing from a DHCP server
The clients must be configured to obtain IP addressing from a DHCP server. (5.3.10) Once a DHCP server has been configured for the network, each client system has to be told to look for a DHCP sever to obtain its 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 are not configured to use the DHCP service.
You are implementing a DHCP server for your segment. Your segment's IP address is 192.168.1.0. Your default gateway address is 192.168.1.254. Your DNS server address is 192.168.1.1. Your default gateway is configured as a NAT router to translate addresses between network segments. You configured the 03 Router option on your DHCP server so it can deliver the IP address of the default gateway to workstations. After configuring your workstations to get their IP addressing information dynamically, your users complain that they are unable to access websites on the internet. How can you resolve this problem? -You must configure your DHCP server with an option that enables IP forwarding (Option 19) -You must configure Automatic Private IP Addressing (APIPA) on each workstation using default settings. -You can't implement a DHCP server in conjunction with a NAT router. -You must configure your DHCP server with an option that delivers the IP address of the DNS server (Option6) -You must configure your DHCP server with an option that delivers the IP address of the default World Wide Web server (Option 72) -You must implement a BOOTP server instead of a DHCP server
You must configure your DHCP server with an option that delivers the IP address of the DNS server (Option 06) (5.3.10) In this scenario, the DHCP server hasn't been configured to deliver the IP address of the DNS server to the workstations. When users try to access websites with a browser, they receive an error message because their workstations can't resolve URLs into IP addresses.