ActualTests.Cisco.640-802.Exam.Q.and.A.08.15.08-DDU (1130589), страница 46
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This graphic shows the result of an attempt toopen a Telnet connection to router Certkiller 1 From router Certkiller 2. Which of thefollowing command sequences will correct this problem?A. Certkiller 2(Config)#line console 0Certkiller 2(Config-line)#loginCertkiller 2(Config-line)#password ciscoB. Certkiller 1 (Config)#line console 0Certkiller 1(Config-line)#password ciscoC. Certkiller 2(Config)#line vty 0 4Certkiller 2(Config-line)#loginCertkiller 2(Config-line)#password ciscoD. Certkiller 1(Config)#line vty 0 4Certkiller 1(Config-line)#loginCertkiller 1(Config-line)#password ciscoE.
None of the aboveAnswer: DQUESTION 405:You are unable to telnet to a router at address 203.125.12.1 from a workstation withthe IP address 203.125.12.23. You suspect that there is a problem with the IPprotocol stack in your PC.
Which of the following actions is most likely to confirmyour diagnosis?A. ping 127.0.0.0B. ping 203.125.12.1C. telnet 127.0.0.1D. ping 127.0.0.1E. tracert 203.125.12.1F. None of the aboveAnswer: DActualtests.com - The Power of Knowing640-802Explanation:Every Windows based PC uses the 127.0.0.1 as the local loopback IP address.
Every PCwill respond to this local IP address if the TCP/IP stack is correctly installed and runningon the machine. If you cannot ping the loopback address of 127.0.0.1, then something iswrong with the TCP/IP protocol stackQUESTION 406:An administrator issues the command "ping 127.0.0.1" from the command lineprompt on a PC host named CK1 . If an ICMP reply is received, what does thisconfirm?A. PC host CK1 has connectivity up to Layer 5 of the OSI model.B. PC host CK1 has a default gateway correctly configured.C.
PC host CK1 has connectivity with a local host.D. PC host CK1 has the TCP/IP protocol stack correctly installed.E. PC host CK1 has connectivity with a Layer 3 device.F. None of the aboveAnswer: DQUESTION 407:In the network shown below, The Certkiller technician is testing connectionproblems. What is the problem indicated by the output from HostA?Actualtests.com - The Power of Knowing640-802A. The gateway address of HostA is incorrect or not configured.B.
An access list is applied to an interface of Certkiller 3.C. The routing on Certkiller 2 is not functioning properly.D. The Fa0/24 interface of Switch1 is down.E. None of the aboveAnswer: AExplanation:Since pings sent to router Certkiller 1 are successful, we know that basic connectivityexists at least to the first hop toward the destination. However, when we perform atraceroute to the destination, the first hop does not show up at all.
This is due to the factthat the host does not have a default gateway specified, and therefore does not knowwhere to send traffic with a destination address in a different subnet.Incorrect Answers:B: Although this may indeed be true, if this were the problem, then the traceroutes wouldat least reach router Certkiller 3.C: If this were the problem, then the traceroute would have at least reached the first hop.D: If this were true, then pings sent to 192.168.3.254 would be unsuccessful.QUESTION 408:Regarding the extended ping command; which of the statements below are true?(Select all valid answer choices)Actualtests.com - The Power of Knowing640-802A. The extended ping command is supported from user EXEC mode.B. The extended ping command is available from privileged EXEC mode.C.
With the extended ping command you can specify the TCP and UDP port to bepinged.D. With the extended ping command you can specify the timeout value.E. With the extended ping command you can specify the datagram size.Answer: B, D, EExplanation:The extended ping command works only at the privileged EXEC command line.Some of the extended ping command values include the datagram size and timeout valueas shown:Datagram size [100]: Size of the ping packet (in bytes). Default: 100 bytes.Timeout in seconds [2]: Timeout interval.
Default: 2 (seconds). The ping is declaredsuccessful only if the ECHO REPLY packet is received before this time interval.Incorrect Answers:A. Regular pings are available in both user and privileged mode, but not extended pings.C. Ports can not be specified.QUESTION 409:When you use the ping command to send ICMP messages across a network, what'sthe most common request/reply pair you'll see? (Select one answer choice)A. Echo request and Echo replyB.
ICMP hold and ICMP sendC. ICMP request and ICMP replyD. Echo off and Echo onE. None of the aboveAnswer: AExplanation:The ICMP protocol uses Echo request and Echo reply with the Ping command. The PINGutility is the most commonly used message to verify connectivity to a remote devicewithin the network.QUESTION 410:Part of the Certkiller network is shown below:Actualtests.com - The Power of Knowing640-802Ping exhibit:Tracert exhibit:You work as a network technician at Certkiller .com.
You are testing connectionproblems in the network and your PC (host Certkiller A) has provided the outputshown above. What is the problem indicated by this output?A. The routing on Router Certkiller 2 is not functioning properly.B. The Fa0/24 interface of Switch Certkiller 4 is down.C. An access list is applied to an interface of Router Certkiller 3.D.
The gateway address of Host Certkiller A is incorrect or not configured.E. None of the aboveAnswer: DExplanation:Destination Host Unreachable - This error message means that no local or remote routeexists for a destination host at the sending host or at a router. Troubleshoot the local hostActualtests.com - The Power of Knowing640-802or the router's routing table. In this case, the local host does not have a route to thedestination, which means that the default gateway has not been configured.Incorrect Answers:A: If this were the case, the "Destination host unreachable" message would have comefrom the router (default gateway), not the local host.B: If this were true, the IP address of the default gateway would not be reachable.C.
Based on the output shown above, the traffic is not even being sent to the router at allso an access list problem can be ruled out until traffic gets sent from the host to thedefault gateway.QUESTION 411:Network Topology Exhibit:Certkiller 1 configuration exhibit:Certkiller 2 configuration exhibit:Actualtests.com - The Power of Knowing640-802You need to ensure connectivity between two new Certkiller offices. You apply theconfigurations in the exhibit into the two new routers Certkiller 1 and Certkiller 2.Otherwise, the routers are configured with their default configurations. A ping fromHost Certkiller A to Host Certkiller B fails, but you are able to ping the S0/0 interfaceof Certkiller 2 from Host CertkillerA.
The configurations of the hosts have beenverified as correct. What could be the cause of the problem?A. The interfaces on Certkiller 2 are not configured properly.B. The serial cable on Certkiller 1 needs to be replaced.C. The IP addressing scheme has overlapping subnetworks.D. Router Certkiller 1 has no route to the 192.168.1.128 network.E.
The ip subnet-zero command must be configured on both routers.Answer: DExplanation:Since Certkiller 1 does not have any static routes or dynamic routing configured on it, itwill only be able to ping directly connected interfaces. This explains why pings workacross the serial interface, but not to any networks beyond the directly connectednetwork.Incorrect Answers:A: The interface configuration appear to be correct, and the fact the pings on directlyconnected interfaces work validates this.B: If there was a problem with the serial cable then pings across the connection wouldfail.C, E: The ip addressing is valid, and there is no need to the "ip subnet-zero" command tobe used since this command is useful for network addressing, but not for IP routing.QUESTION 412:The Certkiller network administrator has issued the "ip route 172.16.33.0255.255.255.0 192.168.22.44" command on a Certkiller router. Which two statementsare true about this command? (Choose two)A.
It configures the router to send any traffic for an unknown destination to theActualtests.com - The Power of Knowing640-802172.16.33.0 networkB. It establishes a static route to the 172.16.33.0 networkC. It uses the default administrative distanceD. It establishes a static route to the 192.168.22.0 networkAnswer: B, CQUESTION 413:Part of the Certkiller network is shown below:Study the exhibit shown above carefully.
In this Certkiller network segment, you addthe following command to the Certkiller 1 router configuration:ip route 192.168.12.0 255.255.255.0 172.16.12.1.What are the results of adding this command? (Choose two)A. Traffic for network 172.16.12.0 is forwarded to the 192.168.12.0 networkB. The command establishes a static routeC. Traffic for al l networks is forwarded to 172.16.12.1D. The command invokes a dynamic routing protocol for 192.168.12.0E.
Traffic for network 192.168.12.0 is forwarded to 172.16.12.1F. This route is automatically propagated throughout the entire networkAnswer: B, EExplanation:To create static routes on a Cisco router, you use the ip route command followed by thedestination network, network mask, and either the next-hop IP address or the local exitinterface. It's vital to keep that last part in mind - you're either configuring the IP addressof the downstream router, or the interface on the local router that will serve as the exitinterface.Let's say your local router has a serial0 interface with an IP address of 200.1.1.1/30, andthe downstream router that will be the next hop will receive packets on its serial1interface with an IP address of 200.1.1.2/30.
The static route will be for packets destinedfor the 172.10.1.0 network. Either of the following ip route statements would be correct.R1(config)#ip route 172.10.1.0 255.255.255.0 200.1.1.2 (next-hop IP address)Actualtests.com - The Power of Knowing640-802ORR1(config)#ip route 172.10.1.0 255.255.255.0 serial0 ( local exit interface)QUESTION 414:You need to configure a default route on a Certkiller router. Which command willconfigure a default route on a router?A. CK1 (config)# ip route 0.0.0.0 10.1.1.0 10.1.1.1B.
CK1 (config)# ip default-route 10.1.1.0C. CK1 (config)# ip default-gateway 10.1.1.0D. CK1 (config)# ip route 0.0.0.0 0.0.0.0 10.1.1.1Answer: DExplanation:The command "IP route 0.0.0.0 0.0.0.0 <ip-address of the interface>" command is usedto configure a default route on a router. In this case, a default route with a next hop IPaddress of 10.1.1.1 was configured.Incorrect Answers:A. This will be an invalid route, since the "10.1.1.0" value will specify the network mask,which in this case is invalid.B, C. These commands are invalid.
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