Module 17 Test Questions

What does the nslookup command do?

Allows a user to manually place DNS queries and analyze the DNA response (pg. 62)

What is DHCP used for?

DHCP is used by clients to acquire an IP configuration from a DHCP server (pg. 13)

What does the IOS ping indicator "U" stand for?

Destination unreachable (pg. 24)

What tool could a network administrator use to ping from a port on the opposite side of the router? Traceroute Show cdp neighbors Telnet An extended ping

Extended ping (pg. 28)

Which method is used to send a ping message specifying the source address for the ping? Issue the ping command from within interface configuration mode Issue the ping command without specifying a destination IP Issue the ping command without extended commands Issue the ping command after shutting down un-needed interfaces

Issue the ping command without specifying a destination IP (pg. 27)

A user reports a lack of network connectivity. The technician takes control of the machine and attempts to ping other computers on the network and these pings fail. The technician pings the default gateway and that also fails. What can be determined for sure by the results of these tests? The NIC in the PC is bad The TCP/IP protocol is not enabled The router that is attached to the same network as the workstation is down Nothing can be determined for sure at this point

Nothing can be determined for sure at this point (pg. 23)

What command must you use to display log messages while using telnet or ssh?

Terminal monitor in privilege exec mode (pg. 55)

An employee complains that a Windows PC cannot connect to the Internet. A network technician issues the ipconfig command on the PC and is shown an IP address of 169.254.10.3. Which two conclusions can be drawn? The PC cannot contact a DHCP server The DNS server address is misconfigured The default gateway address is not configured The PC is configured to obtain an IP address automatically The enterprise network is misconfigured for dynamic routing

The PC cannot contact a DHCP server The PC is configured to obtain an IP address automatically (pg. 60)

What information about a Cisco router can be verified using the show version command? The routing protocol version that is enabled The value of the configuration register The operational status of serial interfaces The administrative distance used to reach networks

The value of the configuration register (pg. 45)

What is the purpose of a small company using a protocol analyzer utility to capture network traffic on the network segments where the company is considering a network upgrade? To identify the source and destination of local network traffic To capture the Internet connection bandwidth requirement To document and analyze network traffic requirements on each network segment To establish a baseline for security analysis after the network is upgraded

To document and analyze traffic requirements on each network segment (pg. 19)

Which statement describes the ping and tracert commands? Tracert shows each hop, while ping shows a destination reply only Tracert uses IP addresses; ping does not Both ping and tracert can show results in a graphical display Ping shows whether the transmission is successful; tracert does not

Tracert shows each hop, while ping shows a destination reply only (pg. 37)

What command do you use to verify the IP addresses assigned to a windows-based computer?

ipconfig (pg. 59)

A support technician needs to know the IP address of the wireless interface on a Mac. What is the best command to use to accomplish the task? ipconfig getifaddr en0 copy running-config startup-config show interfaces show ip nat translations

ipconfig getifaddr en0 (pg. 66)

Users are complaining that they are unable to browse certain websites on the Internet. An administrator can successfully ping a web server via its IP address, but cannot browse to the domain name of the website. Which troubleshooting tool would be most useful in determining where the problem is? netstat tracert nslookup ipconfig

nslookup (pg. 63)

How do we force traceroute to use IPv6?

tracert /? for extended ping -6 to force IPv6 (pg. 32)

If an administrator is testing connectivity to a remote device and the output is "UUUUU", what does the output of this command indicate? Connectivity to the remote device was successful A router along the path did not have a router to the destination A ping packet is being blocked by a security device along the path The connection timed out while waiting for a reply from the remote device

A router along the path did not have a route to the destination (pg. 25)

A network engineer is analyzing reports from a recently performed network baseline. Which situation would depict a possible latency issue? A change in the bandwidth according to the show interfaces output A next-hop timeout from a traceroute An increase in host-to-host ping response times A change in the amount of RAM according to the show version output

An increase in host-to-host ping response times (pg. 35)

What is an accurate description of redundancy? Configuring a router with a complete MAC address database to ensure that all frames can be forwarded to the correct destination Configuring a switch with proper security to ensure that all traffic forwarded through an interface is filtered Designing a network to use multiple virtual devices to ensure that all traffic uses the best path through the internetwork Designing a network to use multiple paths between switches to ensure there is no single point of failure

Designing a network to use multiple paths between switches to ensure there is no single point of failure. (pg. 8)

By following a structured troubleshooting approach, a network administrator identified a network issue after a conversation with the user. What is the next step that the administrator should take? Verify full system functionality Test the theory to determine cause Establish a theory of probable causes Establish a plan of action to resolve the issue

Establish a theory of probable causes (pg. 52)

Baseline documentation for a small company had ping round trip time statistics of 36/97/132 between two hosts. Today the network administrator checked connectivity by pinging between the same two hosts which resulted in a round trip time of 1458/2390/6066. What does this indicate to the network administrator? Connectivity between the two hosts are fine One of the hosts is not connected to the network properly Something is causing interference between a host and a router Performance between the networks is within expected parameters Something is causing a time delay between the networks

Something is causing a time delay between the networks (pg. 36)

What does the "show cdp neighbors detail" command reveal?

The IP address of a neighboring device (pg. 46)

What are device identifiers?

The configured host name of a switch, router, or other device (pg. 46)

What does the command "show ip route" do on a router?

Verifies layer 3 routing information (pg. 44)

What does the command "show running-config" do on a router?

Verifies the current configuration and settings (pg. 44)

What does the command "show interfaces" do on a router?

Verifies the interface status and displays any error messages (pg. 44)

A network administrator is upgrading a small business network to give high priority to real-time applications traffic. What two types of network services is the network administrator trying to accommodate? Voice Video Instant messaging FTP SNMP

Voice, video (pg. 10)

What does traceroute do?

Helps to locate Layer 3 problem areas in a network. A trace returns a list of hops as a packet is routed through a network. (pg. 29)

A student wants to save a router configuration to NVRAM. What is the best command to use to accomplish the task? copy running-config startup-config show interfaces show ip nat translations show ip route

copy running-config startup-config (pg. 65)

What commands can you use to verify what IPv4 addresses are assigned to the network interface on a router?

show ip interface brief show ip interface (pg. 58)

A network technician is troubleshooting an issue and needs to verify all of the IPv6 interface addresses on a router. What is the best command to use to accomplish the task? show ipv6 interface show interfaces show ip nat translations show ip route

show ipv6 interface (pg. 64)