A Ezonexam technician is troubleshooting connectivity problems between two routers that are directly connected through the serial line. The technician notices that the serial line is up but cannot see any neighbors displayed in the output of the show cdp

题目

A Ezonexam technician is troubleshooting connectivity problems between two routers that are directly connected through the serial line. The technician notices that the serial line is up but cannot see any neighbors displayed in the output of the show cdp neighbors command.

In which OSI layer is the problem most likely occurring?

A．Physical

B．Data link

C．Network layer

D．Transport layer

E．Application layer

相似考题

1.CDP is being used throughout the Ezonexam network. What are two reasons why the Ezonexam network administrator would use CDP? (Choose two)A. To determine the status of network services on a remote deviceB. To obtain the IP Address of a connected device in order to telnet to the deviceC. To verify the type of cable interconnecting two devicesD. To verify Layer 2 connectivity between two devices when Layer 3 failsE. To obtain VLAN information from directly connected swticehsF. To determine the status of the routing protocols between directly connected routersG. To support automatic network failover during outages

2.When troubleshooting an EIGRP connectivity problem, you notice that two connected EIGRP routers are not becoming EIGRP neighbors. A ping between the two routers was successful.What is the next thing that should be checked?（）A. Verify that the EIGRP hello and hold timers match exactly.B. Verify that EIGRP broadcast packets are not being dropped between the two routers with the show ip EIGRP peer command.C. Verify that EIGRP broadcast packets are not being dropped between the two routers with the show ip EIGRP traffic command.D. Verify that EIGRP is enabled for the appropriate networks on the local and neighboring router.

3.In which of the following scenarios would the "show cdp neighbors detail"command be an appropriate troubleshooting tool?()A. Two switches are connected via a trunk. Both switches have been assigned an IP address, subnet mask, and default gateway. A ping is successful between the two switches. However, VLAN information is not passed from one switch to the other switch.B. A router and a switch have been assigned an IP address, a subnet mask, and a default gateway. They are directly connected, but a ping between the two devices fails.C. A router connects to another router through a serial interface. Both routers have been assigned an IP address, subnet mask, and default gateway. The routers are running RIP and the networks directly connected to the first router do not pass to the second router. However, a ping from one router to the serial interface of the directly connected neighboring router is successful.D. A router connects to another router via a switch. Both routers and the switch have been assigned an IP address, subnet mask, and default gateway. Neither the routers nor the switch are able to ping one of the hosts that is directly to the switch.

4.An administrator issues the show ip interface s0/0 command and the output displays that interface Serial0/0 is up, line protocol is up.What does "line protocol is up" specifically indicate about the interface?A．The cable is attached properly.B．CDP has discovered the connected device.C．Keepalives are being received on the interface.D．A carrier detect signal has been received from the connected device.E．IP is correctly configured on the interface.

参考答案和解析
正确答案：B
解析：Explanation:Asthequestionstatesthatseriallineisup,itmeanstheproblemisnotontheNetworklayer.Theadministratorcannotseeanyoutputbyissuingtheshowcdpneighborscommand.ItmeansthatCDPisdisabledandCDPisaprotocolthatrunsoverLayer2(thedatalinklayer)onallCiscorouters,bridges,accessservers,andswitches.
更多“A Ezonexam technician is troubleshooting connectivity problems between two routers that are directly connected through the serial line. The technician notices that the serial line is up but cannot see any neighbors displayed in the output of the show cdp ”相关问题

  • 第1题：

    There is a connectivity problem between the serial 0/0 interface of router TESTKING1 and the serial 0/0 interface of TESTKING2. A leased line point to point circuit is installed between these two routers. The output from the "show interface serial 0/0" command is displayed below for each of these routers:From your observations of the above exhibit, what is the underlying cause of the problem?（）

    A. The loopback is not set.

    B. The serial cable is faulty.

    C. The subnet mask is not configured properly.

    D. The IP address is not configured properly.

    E. The Layer 2 frame types are not compatible.

    F. The keepalive setting is not configured properly.


    参考答案：E

  • 第2题：

    You are a network technician at TestKing, Inc. You are currently troubleshooting a routing issue on the Testking1 router. You issue the show ip route command. The output from the command is displayed in the following exhibit:Which one of the following routes WILL NOT be entered into its neighboring routers routing table?（）

    A. R 192.168.11.0/24 [120/7] via 192.168.9.1, 00:00:03, Serial1

    B. C 192.168.1.0/24 is directly connected, Ethernet0

    C. R 192.168.8.0/24 [120/1] via 192.168.2.2, 00:00:10, Serial0

    D. R 192.168.5.0/24 [120/15] via 192.168.2.2, 00:00:10, Serial0

    E. None of the above


    参考答案：D

  • 第3题：

    In a lab, two routers are connected directly together using serial interfaces in a back-to-back configuration. No external DCE devices are being used. What additional command is needed to bring this link up?（）

    A.serialup

    B.clock

    C.clockrate

    D.dcerate

    E.dterate


    参考答案：C

  • 第4题：

    What are two reasons a network administrator would use CDP?()

    A. to verify the type of cable interconnecting two devices

    B. to determine the status of network services on a remote device

    C. to obtain VLAN information from directly connected switches

    D. to verify Layer 2 connectivity between two devices when Layer 3 fails

    E. to obtain the IP address of a connected device in order to telnet to the device

    F. to determine the status of the routing protocols between directly connected routers


    参考答案：D, E

  • 第5题：

    What are two reasons a network administrator would use CDP (Choose two.)()。

    A.to verify the type of cable interconnecting two devices

    B.to determine the status of network services on a remote device

    C.to obtain VLAN information from directly connected switches

    D.to verify Layer 2 connectivity between two devices when Layer 3 fails

    E.to obtain the IP address of a connected device in order to telnet to the device

    F.to determine the status of the routing protocols between directly connected routers


    参考答案：D, E

  • 第6题：

    A TestKing.com technician is troubleshooting connectivity problems between two routers that are directly connected through the serial line. The technician notices that the serial line is up but cannot see any neighbors displayed in the output of the show cdp neighbors command. In which OSI layer is the problem most likely occurring?（）

    • A、Physical
    • B、Data link
    • C、Network layer
    • D、Transport layer
    • E、Application layer

    正确答案:B

  • 第7题：

    Two Cisco routers are connected to each other and are enabled CDP. Serial line is up，protocol is also up but cdp neighbor not working. What layer of the OSI model does the problem most likely exist？


    正确答案:Data link layer.

  • 第8题：

    In a lab, two routers are connected directly together using serial interfaces in a back-to-back configuration. No external DCE devices are being used. What additional command is needed to bring this link up?（）

    • A、serialup
    • B、clock
    • C、clockrate
    • D、dcerate
    • E、dterate

    正确答案:C

  • 第9题：

    What are two reasons a network administrator would use CDP (Choose two.)（）。

    • A、to verify the type of cable interconnecting two devices
    • B、to determine the status of network services on a remote device
    • C、to obtain VLAN information from directly connected switches
    • D、to verify Layer 2 connectivity between two devices when Layer 3 fails
    • E、to obtain the IP address of a connected device in order to telnet to the device
    • F、to determine the status of the routing protocols between directly connected routers

    正确答案:D,E

  • 第10题：

    单选题
    In which of the following scenarios would the "show cdp neighbors detail"command be an appropriate troubleshooting tool?（）
    A

    Two switches are connected via a trunk. Both switches have been assigned an IP address, subnet mask, and default gateway. A ping is successful between the two switches. However, VLAN information is not passed from one switch to the other switch.

    B

    A router and a switch have been assigned an IP address, a subnet mask, and a default gateway. They are directly connected, but a ping between the two devices fails.

    C

    A router connects to another router through a serial interface. Both routers have been assigned an IP address, subnet mask, and default gateway. The routers are running RIP and the networks directly connected to the first router do not pass to the second router. However, a ping from one router to the serial interface of the directly connected neighboring router is successful.

    D

    A router connects to another router via a switch. Both routers and the switch have been assigned an IP address, subnet mask, and default gateway. Neither the routers nor the switch are able to ping one of the hosts that is directly to the switch.


    正确答案： A
    解析： 暂无解析

  • 第11题：

    多选题
    What are two reasons a network administrator would use CDP? （）
    A

    to verify the type of cable interconnecting two devices

    B

    to determine the status of network services on a remote device

    C

    to obtain VLAN information from directly connected switches

    D

    to verify Layer 2 connectivity between two devices when Layer 3 fails

    E

    to obtain the IP address of a connected device in order to telnet to the device

    F

    to determine the status of the routing protocols between directly connected routers


    正确答案： B,A
    解析： 暂无解析

  • 第12题：

    单选题
    A TestKing.com technician is troubleshooting connectivity problems between two routers that are directly connected through the serial line. The technician notices that the serial line is up but cannot see any neighbors displayed in the output of the show cdp neighbors command. In which OSI layer is the problem most likely occurring?（）
    A

    Physical

    B

    Data link

    C

    Network layer

    D

    Transport layer

    E

    Application layer


    正确答案： A
    解析： 暂无解析

  • 第13题：

    Part of the configuration files for routers testking1 and testking2 are displayed below:If you were to enter the "show interface serial 0" command on router testking1,which of the following will be displayed?（）

    A. Serial 0 is down, line protocol is down

    B. Serial 0 is up, line protocol is up

    C. Open: IPCP, CDPCP

    D. LCP closed

    E. LCP open


    参考答案：B, E

  • 第14题：

    A TestKing.com technician is troubleshooting connectivity problems between two routers that are directly connected through the serial line. The technician notices that the serial line is up but cannot see any neighbors displayed in the output of the show cdp neighbors command.In which OSI layer is the problem most likely occurring?（）

    A. Physical

    B. Data link

    C. Network layer

    D. Transport layer

    E. Application layer


    参考答案：B

  • 第15题：

    Which line from the output of the show ip interface command indicates a layer 1 problem?()

    A. Serial0/1 is up, line protocol is down

    B. Serial0/1 is down, line protocol is down

    C. Serial0/1 is up, line protocol is up

    D. Serial0/1 is administratively down, line protocol is down


    参考答案：B

  • 第16题：

    The administrator is unable to establish connectivity between two Cisco routers. Upon reviewing the command output of both routers, what is the most likely caust of the problem?()

    A.Authentication needs to be changed to PAP for both routers.

    B.Serial IP addresses of routers are not on the same subnet.

    C.Username/password is incorrectly configured.

    D.Router names are incorrectly configured.


    参考答案：C

  • 第17题：

    You enabled CDP on two Cisco Routers which are connected to each other. The Line and Protocol statusfor the interfaces on both routers show as UP but the routers do not see each other a CDP neighbors.Which layer of the OSI model does the problem most likely exist？（）

    • A、Physical
    • B、Session
    • C、Application
    • D、Data-Link
    • E、Network

    正确答案:D

  • 第18题：

    What command verifies connectivity between two hosts by sending and receiving ICMP echo messages?（）

    • A、ping
    • B、tracert
    • C、netstat
    • D、show cdp neighbors detail
    • E、show ip route
    • F、traceroute

    正确答案:A

  • 第19题：

    The administrator is unable to establish connectivity between two Cisco routers. Upon reviewing the command output of both routers, what is the most likely caust of the problem?（）

    • A、Authentication needs to be changed to PAP for both routers.
    • B、Serial IP addresses of routers are not on the same subnet.
    • C、Username/password is incorrectly configured.
    • D、Router names are incorrectly configured.

    正确答案:C

  • 第20题：

    Which line from the output of the show ip interface command indicates a layer 1 problem?（）

    • A、Serial0/1 is up, line protocol is down
    • B、Serial0/1 is down, line protocol is down
    • C、Serial0/1 is up, line protocol is up
    • D、Serial0/1 is administratively down, line protocol is down

    正确答案:B

  • 第21题：

    What are two reasons a network administrator would use CDP?（）

    • A、to verify the type of cable interconnecting two devices
    • B、to determine the status of network services on a remote device
    • C、to obtain VLAN information from directly connected switches
    • D、to verify Layer 2 connectivity between two devices when Layer 3 fails
    • E、to obtain the IP address of a connected device in order to telnet to the device
    • F、to determine the status of the routing protocols between directly connected routers

    正确答案:D,E

  • 第22题：

    问答题
    Two Cisco routers are connected to each other and are enabled CDP. Serial line is up，protocol is also up but cdp neighbor not working. What layer of the OSI model does the problem most likely exist？

    正确答案： Data link layer.
    解析： 暂无解析

  • 第23题：

    单选题
    In a lab, two routers are connected directly together using serial interfaces in a back-to-back configuration. No external DCE devices are being used. What additional command is needed to bring this link up?（）
    A

    serialup

    B

    clock

    C

    clockrate

    D

    dcerate

    E

    dterate


    正确答案： E
    解析： 暂无解析

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