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Networking I. Chapter 4/5: IP Addressing/Switching Practice Questions
Terms in this set (90)
What is the decimal format of the following binary IP address?
What is the correct binary form of the decimal IP address 192.168.1.1?
Match each decimal value on the left with the corresponding hexadecimal value on the right. Not all decimal values have a corresponding hexadecimal value.
Which of the following are valid IP addresses? (Select three.)
A workstation has been assigned the following IP addressing information:
IP address: 192.168.1.26
Subnet mask: 255.255.255.0
Default gateway: 192.168.1.254
DNS server: 192.168.1.1
Given this information, what is the network IP address of this workstation?
A network host has an IP address of 220.127.116.11 assigned to it. Given that the network uses the default classful subnet mask, what is the default routing prefix for this address using CIDR subnet mask notation?
Your network uses a network address of 18.104.22.168 with a subnet mask of 255.255.0.0.
How many IP addresses are available for assignment to network hosts on this network?
Which of the following IP addresses is a valid IP address for a host on a public network?
Which of the following are private IP addresses? (Select two.)
Which of the following devices is most likely to be assigned a public IP address?
A router that connects your home network to the internet.
Your network has a network address of 172.17.0.0 with a subnet mask of 255.255.255.0.
Which of the following are true concerning this network? (Select two.)
1. 254 IP addresses can be assigned to host devices.
2. 172.17.0.255 is the network broadcast address.
You have two subnets on your private network, one with a 20-bit mask, and another with a 22-bit mask. How many available host addresses are there on each subnet? (Select two.)
You have a small network with three subnets as shown in the exhibit. IP addresses for each router interface are also indicated in the exhibit.
How many IP addresses on each subnet remain that can be assigned to hosts?
SubnetA = 125, SubnetB = 0, SubnetC = 13
Drag each binary subnet mask on the left to its appropriate decimal equivalent on the right.
You have a network address of 22.214.171.124 and a subnet mask of 255.255.224.0.
Which four of the following are valid subnet addresses?
You have a network address of 126.96.36.199 and a subnet mask of 255.255.255.192.
Which three of the following are valid host addresses for subnet 188.8.131.52?
While calculating how many subnets are available for a given IP address and subnet mask, when should you use the 2^n - 2 formula? (Select two.)
1. The network uses a classful routing protocol, such as RIP version 1 or IGRP.
2. The no ip subnet zero command is configured.
You have a network address of 184.108.40.206 with a subnet mask of 255.255.255.224.
Which of the following is the broadcast address for subnet 220.127.116.11?
Your network has been assigned 18.104.22.168 as the network address. You have determined that you need 70 subnets.
Which subnet mask value should you select to provide 70 subnets?
You need to connect a router to a subnet. The subnet uses the IP address 192.168.12.0/26. You are instructed to assign the last IP address on the subnet to the router.
Which IP address will you use?
You are configuring a network and have been assigned the network address of 22.214.171.124. You want to subnet the network to allow 5 subnets with 20 hosts per subnet. Which subnet mask should you use?
You have a single router with three subnets as shown. Each subnet has the number of hosts specified.
You need to select a subnet mask for each subnet that provides sufficient host addresses without wasting addresses.
Which mask values should you use?
SubnetA = 255.255.255.192
SubnetB = 255.255.255.224
SubnetC = 255.255.255.128
You need to design a network that supports 275 hosts. You want to place all hosts in a single broadcast domain, and you want to make sure you do not waste IP addresses.
How should you implement your plan?
Place all hosts on the same subnet. Use a mask of 255.255.254.0.
You have a network with two routers as shown. You need to choose subnet addresses for subnets 1 and 2.
Which of the following subnets would you use? (Select two.)
You have a small network with three subnets as shown. IP addresses for each router interface are also indicated.
You need to connect Wrk1_A to SubnetA and Wrk5_C to SubnetC. Which IP addresses should you use? (Select two.)
1. Wrk1_A = 192.168.111.62
2. Wrk5_C = 10.155.64.97
Your client has a class B network address and needs to support 500 hosts on as many subnets as possible.
Which subnet mask should you recommend?
You have a network address of 126.96.36.199 and a subnet mask of 255.255.255.240.
How many assignable host addresses are on each subnet?
You have been assigned the IP address of 188.8.131.52 for your network. You have determined that you need five subnets to allow future growth. What subnet mask value would you use?
You have a network address of 184.108.40.206 and a subnet mask of 255.255.254.0.
How many possible host addresses are on each subnet, excluding host addresses of all 1s and all 0s?
You have a network address of 220.127.116.11 and have selected 255.255.255.224 as the subnet mask value. How many possible subnets are there?
You have a network with two routers as shown. RouterA and RouterB are configured to use RIP version 2 with auto-summarization enabled.
Which summarized network entry will RouterA have in its routing table for the subnets connected to RouterB?
You have a network with two routers as shown. You would like to configure a single static route on RouterA that summarizes the routes accessible through RouterB.
Which static route would you configure?
ip route 192.168.100.64 255.255.255.192 192.168.100.34
You have a network with two routers as shown. Router A currently has a single static route to network 10.0.155.80/28.
You need to add another subnet to router B. This subnet should also use a 28-bit mask. You would like to replace the existing static route to network 10.0.155.80/28 with a single summarized static route that includes the old network and the new network. You want to minimize wasted addresses.
What should you do? (Select two.)
1. Configure the static route to use a network of 10.0.155.64 and a mask of 255.255.255.224.
2. Use 10.0.155.64/28 for the new subnet.
You have a network with three routers as shown.
All routers are configured to share information for all known routes using the same routing protocol. Automatic summarization is enabled.
Router B shares its known networks with router A. Which of the following routes will be in router A's routing table?
172.16.2.0/27, 172.16.2.32/28, and 172.16.2.48/28
Which of the following allow you to disable automatic summarization? (Select two.)
Terry is using the EIGRP routing protocol. Terry wants to use a single route to represent multiple routes to reduce the size of routing tables in the network. Which of the following routing summarization methods is being used?
On your network, you have subnetting the network address 10.0.0.0 into smaller subnets, and it is separated by a network with different classful network addresses, such as 18.104.22.168. Which route summarization command do you need to execute?
The following commands have been executed on a router:
Router(config)#int fa 0/1
Router(config-if)#ip summary-address rip 172.16.0.0 255.255.0.0
Which interface type is fa 0/1?
When using the ip summary-address command, which of the following is true?
Neighboring devices only have a summary route in their routing tables.
Which of the following describes route summarization?
Combines a contiguous set of addresses into a single address.
Consider the following IPv6 address:
Drag the component parts of this address on the left to the corresponding descriptions on the right. Not all descriptions on the right have corresponding components on the left.
Global Routing Prefix: FD01:0001:0001:005
Subnet ID: :005
Interface ID: ::7
Prefix Length: /64
Global ID: (Blank)
Unique Local Unicast Prefix: FD
Consider the following IPv6 address:
Which of the following are valid shortened forms of this address? (Select two.)
Based on the address prefix for each IPv6 address on the right, identify the address type from the list on the left. (Addresses used might not represent actual addresses used in production.)
2001:6789:9078::ABCE:AFFF:FE98:0001: Global unicast
FD00::8907:FF:FE76:ABC: Unique local
Which of the following IPv6 addresses is equivalent to the IPv4 loopback address of 127.0.0.1?
You need to design an IPv6 addressing scheme for your network. The following are key requirements for your design:
Infrastructure hosts, such as routers and servers, are assigned static interface IDs, while workstations, notebooks, tablets, and phones are assigned interface IDs dynamically.
Internet access must be available to all hosts through an ISP.
Site-to-site WAN connections are created using leased lines.
Which type of IPv6 addressing is most appropriate for hosts in this network?
Global unicast addressing
Your organization has decided to implement unique local unicast IPv6 addressing. A global ID of FD01:A001:0001::/48 has been selected for the organization's IPv6 addressing scheme. The next 16 bits beyond the global ID have been used to define the following subnets:
You need to statically assign an interface ID to a router interface connected to the FD01:A001:0001:0003::/64 subnet. To ensure uniqueness, the interface ID should be constructed using the MAC address of the router interface.
Which interface configuration command would you use to do this?
ipv6 address FD01:A001:0001:0003::/64 eui-64
You are working on a workstation with the following MAC address:
Which of the following will be the link-local address using the modified EUI-64 format?
Which of the following are characteristics of 6-to-4 tunneling? (Select three.)
1. Dual stack routers
2. Works through NAT
3. Tunnel endpoints configured on routers
Your company has just started contracting with the government. As part of the contract, you have configured a special server for running a custom application. Contract terms dictate that this server use only IPv6.
You have several hosts that need to communicate with this server. These hosts only run IPv4 and cannot be configured to run IPv6.
Which solution would you use to allow the IPv4 clients to communicate with the IPv6 server?
Which of the following IPv6 addresses is used by a host to contact a DHCP server?
You have a TCP/IP network with 50 hosts. There have been inconsistent communication problems between hosts. You run a protocol analyzer and discover that two hosts are assigned the same IP address.
Which protocol can you implement on your network to help prevent problems such as this?
Which of the following statements about the dynamic host configuration protocol (DHCP) are true? (Select two.)
1. A DHCP server assigns addresses to requesting hosts.
2. It can deliver other configuration information in addition to IP addresses.
You have a DHCP server on your network. Which of the following is the correct order of DHCP messages exchanged between a client and server when the client obtains an IP address using a 4-way handshake?
DHCPDISCOVER, DHCPOFFER, DHCPREQUEST, DHCPACK
You have a small network as shown.
You configure DHCP on Router1 to provide IP addresses to all hosts connected to SwitchA. Following the configuration, you verify that Wrk1 has received an IP address from the DHCP service. Wrk1 can ping every host on the subnet, but cannot communicate with any hosts connected to Switch B or on the internet.
What should you do?
Configure the DHCP server to deliver the default gateway address along with the IP address.
You have a small network connected to the internet as shown below.
Router1 will provide NAT services to all hosts on the private network and DHCP services to hosts connected to SubnetA.
Srv1 is located on SubnetA. You want to make sure that this server is assigned the same IP address every time it boots, but you still want to centrally manage the address that it uses.
What should you do?
Configure a DHCP binding for Srv1.
You want to configure DHCP on your Cisco router to provide automatic IP address assignment to a single subnet. You will use 192.168.12.0/27 for the subnet address.
The router interface has been configured with an IP address of 192.168.12.1. Additionally, you want to make sure that a specific server, SrvFS, always gets the last IP address on the subnet.
How should you configure DHCP on the router? (Select two.)
1. Create an address pool with a start address of 192.168.12.2 and end address of 192.168.12.30.
2. Create a DHCP binding for address 192.168.12.30.
You have configured DHCP on your router. A partial configuration is shown below:
hostname RouterA!interface FastEthernet0/0ip address 192.168.11.1 255.255.255.0speed autoduplex autoip access-group 1 in!interface FastEthernet0/1no ip addressspeed autoduplex auto!ip dhcp excluded-address 192.168.11.1 192.168.11.50 ip dhcp excluded-address 192.168.12.1 192.168.12.50!ip dhcp pool 0network 192.168.11.0 255.255.255.0domain-name westsim.comdns-server 192.168.11.2 192.168.12.2default-router 192.168.11.1!ip dhcp pool 1network 192.168.12.0 255.255.255.0domain-name westsim.comdns-server 192.168.12.2 192.168.11.2default-router 192.168.12.1!ip dhcp pool 2host 192.168.12.166hardware-address 02c7.f800.0422!access-list 1 permit 192.168.11.0 0.0.0.255!
Srv2 is a host connected to the Fa0/1 interface of RouterA. Its MAC address is 02c7.f800.0422 and is configured to use DHCP to request an IP address.
Which of the following addresses will most likely be assigned to Srv2 when it boots?
It will not be assigned an IP address.
You have configured DHCP on your router. A partial configuration is shown below:
hostname RouterA!interface FastEthernet0/0ip address 192.168.11.1 255.255.255.0speed autoduplex auto!interface FastEthernet0/1ip address 192.168.12.1 255.255.255.0speed autoduplex auto!ip dhcp excluded-address 192.168.11.1 192.168.11.50 !ip dhcp pool 0network 192.168.11.0 255.255.255.0domain-name westsim.comdns-server 192.168.11.2 192.168.12.2!ip dhcp pool 2host 192.168.11.166hardware-address 02c7.f800.0422!access-list 1 permit 192.168.11.0 0.0.0.255!
Srv2 is a host connected to the Fa0/0 interface of RouterA with a MAC address of 02c7.f800.0422. When it boots, it is assigned the IP address of 192.168.11.166. It can only communicate with hosts on the same subnet.
What should you do to correct the problem?
Add a default-router statement to DHCP pool 2.
You have a Cisco router connected to a local ISP. The ISP dictates that the router use DHCP to receive its IP address and other configuration information.
Which command should you use when configuring the ISP interface on the router?
ip address dhcp
You have three hosts on network 192.168.10.0/24 as shown.
If interface Fa0/0 on RouterB has the ip helper-address 172.17.10.20 configuration command in its running configuration, which of the following statements are true? (Select two.)
1. The hosts may receive their IP address information through DHCP.
2. RouterB will forward broadcast packets sent to the: Time, DNS, BOOTP, and TFTP ports.
Listed below are several DNS record types. Match the record type on the left with its function on the right.
Points a hostname to an IPv4 address.: A
Provides alternate names to hosts that already have a host record.: CNAME
Points an IP address to a hostname.: PTR
Points a hostname to an IPv6 address.: AAAA
Identifies servers that can be used to deliver mail.: MX
If dynamic DNS is being used, which of the following events will cause a dynamic update of the host records? (Select two.)
1. The DHCP server renews an IP address lease.
2. The ipconfig /registerdns command is entered on a workstation.
Which of the following services automatically creates and deletes DNS host records when an IP address lease is created or released?
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?
You are setting up a new branch office for your company. You would like to implement solutions to provide the following services:
Hosts should be able to contact other hosts using names such as server1.westsim.com.
IP address assignment should be centrally managed.
Which services should you implement on your network to meet the requirements? (Select two.)
Match the DNS components on the left with its function on the right.
Managed by the Internet Corporation of Assigned Names and Numbers (ICANN).: Top-level domain
Includes the host name and all domain names separated by periods.: Fully qualified domain name
The part of a domain name that represents a specific host.: Hostname
Has a complete copy of all the records for a particular domain.: Authoritative server
The last part of a domain name.: Top-level domain
Denotes a fully qualified, unambiguous domain name.: . (dot) domain
What is the difference between a forward lookup zone and a reverse lookup? (Select two.)
1. A forward lookup finds the IP address for a given host name.
2. A reverse lookup finds the host name from a given IP address.
You have a workstation configured with DNS server addresses as follows:
Primary DNS server = 192.168.1.1
Alternate DNS server = 192.168.1.155
While browsing the internet, you go to www.cisco.com. A few minutes later, you type ping www.cisco.com into a command prompt.
How will the workstation get the IP address for www.cisco.com?
Out of its local DNS cache
Listed below are several places that a workstation checks to resolve DNS hostnames.
A. Primary DNS server
B. Secondary DNS servers
C. HOSTS file
D. Local DNS cache
In a browser, you type the name of a website. In which order will these locations be checked during the name resolution process?
D, C, A, B
For each operation on the right, match the appropriate command from the list on the left.
Configure DNS server addresses for the router to use for resolving hostnames.: ip name-server
Create static entries for hosts that associate each hostname with an IP address.: ip host
Prevent the router from using DNS to resolve hostnames.: no ip domain-lookup
Set the DNS name used by the router.:
Which of the following describes the role of Access Switches and how they are implemented in the design of a local area network on a university or corporate campus? (Select three.)
1. Communicate with each other through distribution switches.
2. Connected to distribution switches using one or more ports or uplinks.
3. Give end users access to the local area network.
An Ethernet frame has just arrived on a switch port. The switch examines the destination MAC address of the frame. It is a unicast address, but no mapping exists in the CAM table for the destination address.
Assuming that no VLANs are configured, what happens next?
The switch sends a copy of the frame to all connected devices on all ports.
Device B sends a frame to Device A on the network shown. The switch has an entry in its CAM table for Device A in its database, but not for Device B.
Which of the following best describes what the switch does with the message?
The switch records the address and port for Device B in its database. It sends the frame out port Fa0/1.
You have a switch connected to a small network as shown. A hub connects Wrk1 and Wrk5 to the switch. The switch has the following information in its CAM table:
Wrk1 sends a frame addressed to Wrk5. What will the switch do with the frame? (Select two.)
1. Not record the location of any device.
2. Drop the frame.
You have a network consisting of a switch, a router, a hub, and several workstations connected as shown in the graphic. No VLANs have been configured.
How many collision domains exist on the network shown?
You administer a network that uses bridges to connect network segments. The network is currently suffering from serious broadcast storms.
What can you do to solve the problem?
Replace the bridges with routers.
Which of the following are advantages of using bridges to segment LAN traffic? (Select two.)
1. Bridges can link network segments that use different physical media (as long as they have the same architecture).
2. Bridges create separate collision domains.
You are the network administrator for a rapidly growing company with a 100BaseT network. Users have recently complained about slow file transfers. In a check of network traffic, you discover a high number of collisions.
Which connectivity device would best reduce the number of collisions and prepare for future growth?
Which frame processing method causes a switch to wait until the first 64 bytes of the frame have been received before forwarding the frame to the destination device?
Which of the following are true of store-and-forward switches? (Select three.)
1. Frames are checked for errors before being forwarded.
2. Frames with errors are dropped.
3. Latency is greater than with cut-through switches.
A workstation is connected to a switch on the Gi0/2 interface using a straight-through cable. The Ethernet interface in the workstation has been manually configured to use a 100 Mbps link speed and full duplexing.
Which of the following are true in this scenario? (Select three.)
1. The switch attempts to sense the link speed. If it can't, the slowest link speed supported on the interface is selected.
2. If the link speed is 10 Mbps or 100 Mbps, half-duplex is used.
3. If the link speed is 1000 Mbps or faster, full-duplex is used.
You are the only network administrator for your company. You are planning for an upcoming vacation, and you need to ensure that you can administer your switches remotely while you are gone. What must you configure to allow remote administration? (Select two.)
1. Use Telnet, Secure Shell, or Web protocols to remotely access the switch.
2. The switch must be configured with a valid IP address and default gateway.
During the initial setup of a new switch, which of the following configuration tasks should be performed? (Select three.)
1. Set the default gateway for remote management.
2. Set passwords for the console, virtual terminal (TTY) ,and enable mode.
3. Set an IP address for remote management.
The FastEthernet 0/0 interface on a switch is currently disabled. You need to enable it so a workstation can be connected to it.
Drag each command on the left to the associated configuration step on the right to accomplish this task. Not all of the commands will be used.
Enter global configuration mode.: config terminal
Enter interface configuration mode.: interface fa0/0
Enable the interface.: no shutdown
Verify the interface is up.: show interface status
The following graphic illustrates some of the configuration modes of the switch.
What is one difference between the VLAN interface configuration and config-vlan?
VLAN interface configuration mode is used to configure the switch IP address.
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 subnet mask
You have a small network connected to the internet as shown. 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 Fa0/0 on Router1.
You have a small network with a single subnet connected to the internet as shown in the Exhibit. The router has been assigned the two addresses shown.
You need to manually configure the workstation to connect to the network. The workstation should use RouterA as the default gateway, and DNS1 as the DNS server address.
From the drop-down lists, select the appropriate parameters to configure the workstation's TCP/IP settings.
IP Address: 192.168.12.46
Subnet Mask: 255.255.255.240
Default Gateway: 192.168.12.34
DNS Server: 22.214.171.124
Which command(s) would you use to configure a default-gateway on a Catalyst 2950XL switch?
Switch(config)#ip default-gateway 192.168.10.1
You must configure an IP address on a Catalyst 2950XL switch using the default management switch port. From global configuration mode, which commands would you enter to configure the correct management port?
int vlan 1ip address 192.168.10.2 255.255.255.0
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