ActualTests.Cisco.640-802.Exam.Q.and.A.08.15.08-DDU (1130589), страница 76
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The router at the remote office is a non-Cisco router.How should the network administrator configure the serial interface of the mainoffice router to make the connection?A. Main(config)# interface serial 0/0Main(config-if)# ip address 172.16.1.1 255.255.255.255Main(config-f)# no shutB.
Main(config)# interface serial 0/0Main(config-if)# ip address 172.16.1.1 255.255.255.255Main(config-f)# encapsulation pppMain(config-if)# no shutActualtests.com - The Power of Knowing640-802C. Main(config)# interface serial 0/0Main(config-if)# ip address 172.16.1.1 255.255.255.255Main(config-f)# encapsulation frame-relayMain(config-if)# authentication chapMain(config-if)# no shutD. Main(config)# interface serial 0/0Main(config-if)# ip address 172.16.1.1 255.255.255.255Main(config-f)# encapsulation ietfAnswer: BExplanation:The default encapsulation on a serial interface is the Cisco proprietary HDLC.
Whenconnecting to routers from another vendor, we will need to use the standards based PPP,which is correctly defined in choice B.Incorrect Answers:A: This is not a correct answer because no encapsulation is defined, so the default HDLCwill be used, which is a Cisco proprietary protocol.C: CHAP authentication is only used by PPP, not HDLC.D: IETF itself is not an encapsulation option on an interface; it is used in frame relaynetworks, where the encapsulation can be frame relay IETF, but not simply IETF alone.QUESTION 672:Two Certkiller routers are connected as shown below:Certkiller 1 configuration exhibit:Certkiller 2 configuration exhibit:Actualtests.com - The Power of Knowing640-802Two routers named Certkiller 1 and Certkiller 2 are connected by their serialinterfaces as shown above, but there is no data connectivity between them.
TheCertkiller 1 router is known to have a correct configuration. Given the partialconfigurations shown in the exhibit, what is the problem on the Certkiller 2 routerthat is causing the lack of connectivity?A. The serial line encapsulations are incompatible.B. The subnet mask is incorrect.C. The maximum transmission unit (MTU) size is too large.D.
The IP address is incorrect.E. A loopback is not set.F. The bandwidth setting is incompatible with the connected interface.G. None of the aboveAnswer: DQUESTION 673:Part of the Certkiller network is shown below:Certkiller 1 configuration exhibit:Actualtests.com - The Power of Knowing640-802In this Certkiller network segment shown above, hosts in network 192.168.2.0 areunable to reach hosts in network 192.168.3.0.
Based on the output from RouterCertkiller 1, what are two possible reasons for the failure? (Choose two)A. The cable that is connected to S0/0 on Router Certkiller 1 is faulty.B. The encapsulation that is configured on S0/0 of Router Certkiller 2 does not match theencapsulation that is configured on S0/0 of Router Certkiller 1.C. The IP address that is configured on S0/0 of Router Certkiller 2 is not in the correctsubnet.D. Interface S0/0 on Router Certkiller 1 is not receiving a clock signal from theCSU/DSU.E. Interface S0/0 on Router Certkiller 2 is administratively down.F. Interface S0/0 on Router Certkiller 1 is configured with an incorrect subnet mask.Answer: B, DQUESTION 674:The two Certkiller Lab routers shown below are interconnected with back-to-backcables between their serial interfaces. How should the serial interface of theCertkiller 1 router be configured to establish Layer 3 connectivity between the tworouters?A.
Certkiller 1(config)#interface serial 3Certkiller 1(config-if)# clock rate 64000Certkiller 1(config-if)# no shutdownB. Certkiller 1(config)#interface serial 3Certkiller 1(config-if)# ip address 192.168.10.3 255.255.255.0Actualtests.com - The Power of Knowing640-802Certkiller 1(config-if)# clock rate 64000C. Certkiller 1(config)#interface serial 3Certkiller 1(config-if)# ip address 192.168.10.3 255.255.255.0Certkiller 1(config-if)# clock rate 64000Certkiller 1(config-if)# no shutdownD.
Certkiller 1(config)#interface serial 3Certkiller 1(config-if)# ip address 192.168.10.3 255.255.255.0Certkiller 1(config-if)# no shutdownE. None of the aboveAnswer: DExplanation:When examining the interface using the show controllers command, the DTE cable isconnected so there is no need to specify the clock rate and bandwidth; just specify the IPaddress and bring up the interface. Only the DCE side of the serial to serial connection isrequired to specify the clock rate.QUESTION 675:An administrator cannot connect from Certkiller 1 to Certkiller 2. To troubleshootthis problem, the administrator has entered the command shown in the exhibit.Based on the output shown, what could be the problem?A. The serial interface has a full buffer.B. The serial interface is configured for half duplex.C.
The serial interface has the wrong type of cable attached.D. The serial interface does not have a cable attached.Actualtests.com - The Power of Knowing640-802E. The serial interface is configured for the wrong frame size.Answer: CExplanation:According to the figure DTE cable should connect to Certkiller 1 on interface but whileexamining using show controllers serial 0/0 command it showing that a DCE isconnected so the wrong type of cable is being used.QUESTION 676:While logged into a router you manually shut down the serial 0 interface using the"shutdown" interface configuration command.
You then issue the "show interfaceserial 0" command in exec mode. What could you expect the status of the serial 0interface to be?A. Serial 0 is up, line protocol is upB. Serial 0 is up, line protocol is downC. Serial 0 is down, line protocol is downD. Serial 0 is down, line protocol is upE. Serial 0 is administratively down, line protocol is downF. Serial 0 is administratively down, line protocol is upAnswer: EExplanation:To bring down an interface for administrative reasons and, as a side effect, remove theconnected router from the routing table, you can use the shutdown interfacesubcommand. To enable the interface back up, issue the "no shutdown" configurationcommand.Incorrect Answers:A.
This is the status of a fully operational interface.B, C. These are the results of line problems or configuration errors.D, F. These two interface conditions should never be seen.QUESTION 677:DRAG DROPYou work as a network administrator at Certkiller .com. You are required toconfigure router Certkiller 2. In particular, you must set the IP address on a serialinterface. Select the appropriate command.
Not all commands are used.Actualtests.com - The Power of Knowing640-802Answer:Actualtests.com - The Power of Knowing640-802QUESTION 678:Part of the Certkiller network is shown below:Actualtests.com - The Power of Knowing640-802The network administrator is configuring router Certkiller 2 to connect to anon-Cisco (Juniper) network. Which two commands would be applied to the S0/0WAN interface, but not to the Fa0/0 LAN interface? (Choose two.)A.
ip addressB. authentication papC. encapsulation pppD. speedE. no shutdownAnswer: B, CExplanation:Since we are connecting to a non Cisco device, we must use PPP on the serial interface.PAP authentication is an optional parameter that can also used on this interface.Incorrect Answers:A, E: Although are indeed configurable on the serial interface, they are also configuredon the LAN interface and we are being asked to choose the options that apply to theserial interface only.D: This is a parameter that can only be set on and Ethernet interface, not on the serialinterface.QUESTION 679:Network topology exhibit:Certkiller 1 configuration exhibit:Actualtests.com - The Power of Knowing640-802Certkiller 2 configuration exhibit:***Note that some output might have been omitted from the configurations exhibits.The Certkiller 1 and Certkiller 2 routers are directly connected through their serialinterfaces for purposes of testing.
Based on the output shown in the exhibit, whatmust be done to make the serial line operational?A. Use the no shutdown command on the Certkiller 1 router.B. Change the IP address on the Certkiller 2 router.C. Configure the serial 0/0 interface on the Certkiller 2 router with a clockrate.D. Start the clock on the Certkiller 1 router.E. Replace the broken cable between the two devices.F. None of the aboveAnswer: CExplanation:Refer to the following example provided by Cisco:Actualtests.com - The Power of Knowing640-802The default serial encapsulation on Cisco routers is Cisco HDLC, so it does not need tobe explicitly configured on the router. As a result, the encapsulation type is not displayedin the configuration.With a back-to-back serial connection, the router connected to the DCE end of the cableprovides the clock signal for the serial link.
The clockrate command in the interfaceconfiguration mode enables the router at the DCE end of the cable (Prasit, in thisexample) to provide the clock signal for the serial link. Issue the show controllerscommand to determine which end of the cable is connected to the serial interface.In this configuration, the DCE end of the cable is connected to Prasit (the clockratecommand is issued), and the DTE end is connected to Spicey.ConfigurationsThis document uses the configurations shown below.Prasitinterface Serial0ip address 5.0.2.1 255.255.255.0clockrate 64000no cdp enableSpiceyinterface Serial1ip address 5.0.2.2 255.255.255.0no cdp enableActualtests.com - The Power of Knowing640-802Reference:http://www.cisco.com/en/US/tech/ CK7 13/ CK317/technologies_configuration_example09186a00800944ff.shtmlQUESTION 680:Network Topology Exhibit:Certkiller 1 configuration Exhibit:Certkiller 2 configuration Exhibit:You are troubleshooting a connectivity problem on the serial interfaces of theseCertkiller routers.
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