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.11 Which ICMP message type notifies source hosts that a receiving host or network is not available?time exceededredirectX destination unreachablesource quenchparameter problemecho reply2At which OSI layer does the routing of email packets from the source network to the destination network occur?applicationsessiontransportX network3 Which of the following commands can be used to statically configure default routes? (Choose two.)ip static-routeX ip routeip network-routeX ip default-networkip default-static4 Which two are true regarding the debug commands? (Choose two.)Debug commands may be issued from the user EXEC prompt.X The command undebug all will turn off all debug operations.By default, the router sends the debug output and messages to the telnet session.X The high processor overhead incurred using debug may disrupt normal router operation.The debug all command provides a summary view of router activity and can be used frequently for troubleshooting.The show debugging command will display current events such as traffic on an interface and error messages generated by nodes on the network.5When issuing the show interfaces serial1 command, a network administrator receives the output shown in the graphic.What are the possible causes of an increase in the number of input errors? (Choose three.)There could be Layer 3 addressing problems.X There could be a problem with faulty telephone equipment.X The router hardware could be defective.There is an incorrectly configured encapsulation on the interface.X There could be a problem with the cabling.6Which two are true regarding the output shown in the graphic? (Choose two.)Network 192.168.44.0 is 610 routers away from the source router.X A packet destined for host 192.168.80.24 will be forwarded out the Serial0 interface.The subnet mask for the networks is 255.255.255.240.X The router is receiving IGRP updates through its serial interface.This router is using three different routing protocols.7 The show interfaces command provides line and protocol status information.Which of the following conditions would never occur in the output of this command?serial1 is up, line protocol is upserial1 is up, line protocol is downserial1 is down, line protocol is downX serial1 is down, line protocol is upserial1 is administratively down, line protocol is down8After issuing the command traceroute 192.168.4.2 from Router A, the following information is returned.Tracing the route to Router_D (192.168.4.2)1 Router_B (192.168.2.2) 16 msec 16 msec 16 msec2 * * *3 * * *What can be concluded about the network shown in the graphic based on the output given?Network 192.168.5.0 is missing from the routing table on Router A.X There is a problem with the connection between Router B and Router C.Router C is not running CDP.Some of the routers are non-Cisco devices.Router B was not able to return ICMP TEMs to Router A.9 During the lookup process when forwarding a packet, a router checks its routing table for the best path to the destination.If a route has an administrative distance of 0, what does this indicate to the router?The packet should be discarded.The destination is unreachable.X The destination is a directly connected network.The source of the update for that route is unreliable.10 Which of the following would be the default administrative distance of a static IP route that references the IP address of the next hop?0X 152011 Which items would be displayed when the show ip protocol command is executed? (Choose three.)X sources of routing updatesX networks being advertisedrouting protocol up or downconfigured routed protocolsLayer 2 status of the interfaceX update timer values12 A network administrator suspects that a network is not being included in the routing updates.Which command will provide information on when the next update is due and which networks are advertised in the update?Router# show interfacesRouter# show controllers serialX Router# show ip protocolsRouter# show ip routeRouter# show running-config13 Which of the following lines from the show interfaces output would indicate a Layer 2 problem?Serial1 is up, line protocol is up.X Serial1 is up, line protocol is down.Serial1 is down, line protocol is down.Serial1 is administratively down, line protocol is down.14 After issuing the show interfaces command, a technician notices the line "Serial1 is down, line protocol is down" in the output.Which of the following are possible reasons for this message output? (Choose three.)There is a mismatch in the encapsulation type on both ends of the link.X A Layer 1 issue exists.X An interface problem exists.The clockrate was not set during configuration.X There is no usable media for the protocol.Keepalive messages are not being sent.15Refer to the network graphic.A packet needs to travel from Router F to Router A.Which path would be selected by the RIP routing protocol if the default metrics are used?F, G, E, D, B, AF, E, D, C, AX F, E, D, AF, E, D, B, A16 Which command will verify the functionality of all seven layers of the OSI model on a network host?pingX telnettracertdebug17 Why does a router build a routing table? (Choose two.)X to list available routes for forwarding datato map local Layer 2 addresses to the remote Layer 3 destination addressto dynamically send periodic updates regarding the router's statusto prevent routing loops when redundant links are added to the networkX to select the best path to a destination18 Which of the following are advantages of using a static route? (Choose three.)X secure operationhighly adaptablelow maintenance configurationX low processor overheadX precise control of path selection19After issuing the show interfaces serial1 command, an administrator notices an increasing number of carrier transitions.What are the possible causes for this increase? (Choose two.)There is an incorrect encapsulation configured on the interface.X There could be an interruption in the line by the service provider.X There is a faulty switch or CSU/DSU.There is noise on the serial line.20 Which command will display routing table information about all known networks and subnetworks?Router# show ip interfacesRouter# show ip connectionsX Router# show ip routeRouter# show ip networks21Consider the RIP network shown in the diagram.Which entries would be listed in the routing table of Router A?R 192.168.5.2[120/1] via 192.168.15.0, 00:00:09, Serial0R 192.168.15.0[120/1] via 192.168.5.2, 00:00:13, Serial1X R 192.168.15.0[120/1] via 192.168.5.1, 00:00:13, Serial0R 192.158.5.1 [120/1] via 192.168.5.2 00:00:29, Serial1R 192.168.15.0 [120/1] via 192.168.5.2, 00:00:29, Serial1R 192.158.5.1 [120/1] via 192.168.5.2 00:00:18, Serial0R 192.168.15.2 [120/1] via 192.168.5.2, 00:00:18, Serial22The network administrator shown in the graphic can ping the E0 interface of the HAR router, but the telnet intranet.xyz.com command issued from her workstation fails to open a session with the intranet.xyz.com server.Which of the following could cause this problem? (Choose two.)X upper-layer application problemsX domain name system problemsIP debugging problemsIP routing problemsICMP connectivity problems23Refer to the network and routing table entries shown in the graphic.What will happen when a packet destined for network 192.66.7.0 is received by Router A?It will be forwarded through interface S1.It will be forwarded to the default route.It will be directed toward the Internet.X It will be discarded [ Pobierz całość w formacie PDF ]