ActualTests.Cisco.640-802.Exam.Q.and.A.08.15.08-DDU (1130589), страница 43
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It is also used after the break sequence is issued during bootup for passwordrecovery use.QUESTION 373:Which type of cable should be used to make a connection between the Fa0/0 port ona router and the Fa0/0 port switch?A. Rollover cableB. Console cableC. Crossover cableD. Straight-through cableE. Serial cableAnswer: DExplanation:Straight-through cables are used to connect host to switch (or hub) and router to switch(or hub).Actualtests.com - The Power of Knowing640-802QUESTION 374:You are trying to connect directly into the LAN port of a Certkiller router. Youwant to telnet to the local Cisco router using TCP/IP but cannot create a session.What should you do to resolve the problem?A.
Use a straight-through cable to connect your computer's COM port to the router'sconsole port.B. Use a crossover cable to connect your computer's COM port to the router's consoleport.C. Use a straight-through cable to connect your computer's COM port to the router'sEthernet port.D. Use a crossover cable to connect your computer's Ethernet port to the router's Ethernetport.E. Use a rollover cable to connect your computer's Ethernet port to the router's Ethernetport.F. Use a straight-through cable to connect your computer's Ethernet port to the router'sEthernet port.G.
None of the aboveAnswer: DExplanation:In order to connect directly to a router via telnet, you must connect to the router via oneof the LAN ports. When connecting directly to the Ethernet port with a PC without theuse of a switch or hub, a crossover cable must be used.Incorrect Answers:A, B, C. In order to telnet directly into the router via a TCP/IP connection, the COM portof the PC can not be used. The COM port is used for direct terminal emulation programssuch as HyperTerminal.E.
Rollover cables are used for console connections into the router, not for TCP/IPconnections.F. Straight through cables are used for connections into a switch or hub from the PC. Itwill not work for direct Ethernet connections into the router.Actualtests.com - The Power of Knowing640-802QUESTION 375:Refer to the following five diagrams:Based on the information provided above, which two network topologies are usingthe correct type of twisted-pair cables? (Choose two)A.
Diagram AB. Diagram BC. Diagram CD. Diagram DE. Diagram EAnswer: A, CQUESTION 376:Refer to the exhibit shown below.Actualtests.com - The Power of Knowing640-802Based on the output shown above, What could be possible causes for the "Serial0/0is down" interface status? (Choose two)A. The bandwidth is set too low.B.
A protocol mismatch exists.C. A Layer 1 problem exists.D. An incorrect cable is being used.E. There is an incorrect IP address on the Serial 0/0 interface.Answer: C, DExplanation:Actualtests.com - The Power of Knowing640-802Reference: http://www.cisco.com/univercd/cc/td/doc/cisintwk/itg_v1/tr1915.htmQUESTION 377:The following port types are installed on a Certkiller device:From the choices shown above, which port can be used for a WAN T1 connection?A. ConsoleB.
Serial 0C. AUIActualtests.com - The Power of Knowing640-802D. BRIE. None of the aboveAnswer: BExplanation:From the choices above, only the serial connection can be used for a data T1. In this case,the serial interface would connect to an external CSU/DSU.Incorrect Answers:A: The router includes an asynchronous serial console port and an auxiliary port. Theconsole and auxiliary ports provide access to the router either locally using a consoleterminal connected to the console port, or remotely using a modem connected to theauxiliary port.C: For flexibility, some Cisco routers provide a generic AUI connector for Ethernet ports.These AUI ports are designed to connect to an external transceiver for conversion to aspecific media type (such as twisted pair, coax, or fiber).D: BRI ports are used to connect to ISDN links, not T1.Reference:http://www.ieng.net/univercd/cc/td/doc/product/access/acs_mod/2800/hw/03_hw.htm#wp1033227QUESTION 378:Exhibit:You need to provide the cables needed for a new Certkiller office.
Based on thegraphic, which types of cables are required to interconnect the devices shown?(Choose three)A. Rollover cableB. RJ-11 cableC. USB cableD. Crossover cableE. Straight-through cableActualtests.com - The Power of Knowing640-802F. V.35 cableAnswer: A, D, EExplanation:Crossover Cables are used to Connect:Host to Host (Peer to Peer) NetworkingSwitch to SwitchHub to HubComputer to Router's Ethernet PortStraight through Cable are used for:Host to SwitchHost to HubSwitch to RouterSerial Cables are for:Router's Serial Port to Serial PortRollover Cable:To connect Router/Switch Console port.In this example, one switch is connected with another switch using a crossover cable. Theswitch connected with the router uses a straight through cable and the PC Connects to therouter's console port using the console rollover cable.QUESTION 379:Part of the Certkiller WAN is shown below:The Certkiller network shown in the exhibit above is running the RIP version 2.
Thisnetwork has converged, and the routers in this network are functioning properly.Then, the FastEthernet0/0 interface on router Certkiller 1 goes down. In which twoways will the routers in this network respond to this change? (Choose two)A. All routers will reference their topology database to determine if any backup routes tothe 192.168.1.0 network are known.B.
Routers router Certkiller 2 and router Certkiller 3 mark the route as inaccessible and willnot accept any further routing updates from router Certkiller 1 until their hold-downtimers expire.Actualtests.com - The Power of Knowing640-802C. When router Certkiller 2 learns from router Certkiller 1 that the link to the 192.168.1.0network has been lost, router Certkiller 2 will respond by sending a route back to routerCertkiller 1 with an infinite metric to the 192.168.1.0 network.D. Because of the split-horizon rule, router Certkiller 2 will be prevented from sendingerroneous information to router Certkiller 1 about connectivity to the 192.168.1.0network.E. router Certkiller 1 will send LSAs to router Certkiller 2 and router Certkiller 3 informingthem of this change, and then all routers will send periodic updates at an increased rateuntil the network again converges.Answer: C, DExplanation:RIP version 2 will send triggered updates when the topology changes like when a linkgoes down.The following are the key characteristics of RIPv2 pertaining to this question:1.
Split horizon - RIP doesn't advertise routes back out the interface in which they came.Or put another way, a router won't tell a neighbor about routes that the neighborpresumably already knows about. That would be silly, and could cause a loop in certaincircumstances.2. Triggered update - RIP will send an update out just a soon as the routing table changes.He won't wait for the Update timer to expire.3. Route poisoning- RIP will tell other routers that a failed route is junk by advertising itwith an infinite metric (which is 16 for RIP), effectively poisoning it.Reference: http://www.ethanbanks.net/?m=200702QUESTION 380:The Certkiller WAN is migrating from RIPv1 to RIPv2.
Which three statements arecorrect about RIP version 2? (Choose three)A. It uses broadcast for its routing updatesB. It supports authenticationC. It is a classless routing protocolD. It has a lower default administrative distance than RIP version 1E. It has the same maximum hop count as version 1F. It does not send the subnet mask un updatesAnswer: B, C, EQUESTION 381:RIP version 2 is being used as the routing protocol within the Certkiller network.What does RIP version 2 use to prevent routing loops? (Choose two)Actualtests.com - The Power of Knowing640-802A.
CIDRB. Split horizonC. AuthenticationD. Classless maskingE. Hold-down timersF. Multicast routing updatesG. Path VectoringAnswer: B, EExplanation:Distance Vector routing protocols employ the split horizon mechanism to reduce thepossibility of routing loops. Split horizon blocks information about routes from beingadvertised by a router out of any interface from which that information originated.RIP versions 1 and 2 also use the concept of hold timers. When a destination has becomeunreachable (or the metric has increased enough to cause poisoning), the destination goesinto "holddown".
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