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单选题
When configuring a serial interface on a router, what is the default encapsulation?（）
A
atm-dxi
B
frame-relay
C
hdlc
D
lapb
E
ppp
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When configuring PPP over ATM interfaces, what does the profile utility accomplish?()
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TestKing.com is configuring the serial interface of a Cisco router to connect to the router of a new ISP. A full T1 is being used for the Internet connection. After issuing the show interface serial 0/0 command, it is observed that the interface is UP and the line protocol is DOWN.Which of the following commands could fix this problem?（）A. Border# copy running-config startup-configB. Border(config)# no shutdownC. Border(config-if)# encapsulation pppD. Border(config-if)# no cdp enableE. Border(config-if)# ip routing
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While logged into a router you manually shut down the serial 0 interface using the "shutdown" interface configuration command. You then issue the "show interface serial 0" command in exec mode. What could you expect the status of the serial 0 interface 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 up
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You have just obtained a modular Cisco router with 2 serial connections and a BRI／U interface. What other physical piece of hardware is required in order to establish an ISDN connection?()
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What is the reason for configuring a passive interface on a router?()
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What must be set correctly when configuring a serial interface so that higher－level protocols calculate the best route?()
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When configuring a serial interface on a router, what is the default encapsulation?()
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Usetheoutputfromtheroutershowninthegraphicabovetodeterminewhichofthefollowingarecorrect.()
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Use the output from the router shown in the graphic above to determine which of the following are correct.()
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You have just obtained a modular Cisco router with 2 serial connections and a BRI/U interface. What other physical piece of hardware is required in order to establish an ISDN connection?（）A、Nothing. The router is already suitable.B、A BRI WAN interface in the router.C、An external NT1 to terminate the local loop.D、A TA/NT1 device on the router.
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When configuring a serial interface on a router, what is the default encapsulation?（）A、atm-dxiB、frame-relayC、hdlcD、lapbE、ppp
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What is the purpose of this command? ip route 0.0.0.0 0.0.0.0 serial0/0（）A、It configures a router to send all packets out interface serial 0/0.B、It configures a router to block routing updates from being sent out interface serial 0/0.C、It configures a router as a firewall, blocking all unauthorized packets from exiting serial 0/0.D、It configures a router to send all packets for unknown destination networks out interface serial 0/0.E、It configures a router to drop all packets for which the destination network is unknown.
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When a router is connected to a Frame Relay WAN link using a serial DTE interface, how is the interface clock rate determined（）。A、It is supplied by the CSU/DSU.B、It is supplied by the far end router.C、It is determined by the clock rate command.D、It is supplied by the Layer 1 bit stream timing.
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While logged into a router you manually shut down the serial 0 interface using the "shutdown" interface configuration command. You then issue the "show interface serial 0" command in exec mode. What could you expect the status of the serial 0 interface 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 up
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A standard access control list has been configured on a router and applied to interface Serial 0 in anoutbound direction. No ACL is applied to Interface Serial 1 on the same router. What will happen whentraffic being filtered by the access list does not match the configured ACL statements for Serial 0？（）A、The traffic is droppedB、The resulting action is determined by the destination IP addressC、The source IP address is checked，and，if a match is not found， traffic is routed out interface Serial 1D、The resulting action is determined by the destination IP address and port number
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TestKing.com is configuring the serial interface of a Cisco router to connect to the router of a new ISP. A full T1 is being used for the Internet connection. After issuing the show interface serial 0/0 command, it is observed that the interface is UP and the line protocol is DOWN. Which of the following commands could fix this problem?（）A、Border# copy running-config startup-configB、Border(config)# no shutdownC、Border(config-if)# encapsulation pppD、Border(config-if)# no cdp enableE、Border(config-if)# ip routing
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A network planning diagram shows a large internetwork with many routers. The configurations show that OSPF has been enabled on all interfaces, I P addresses correctly configured, and OSPF workinG. For which of the following cases would you expect a router to create and flood a Type 2 LSA?（）A、When OSPF is enabled on a LAN interface, and the router is the only router connected to the subnet.B、 When OSPF is enabled on a point - to -point serial link, and that router has both the higher router ID and higher interface IP address on the link.C、When OSPF is enabled on a Frame Relay point - to - point subinterface, has the lower RID and lower subinterfa ce IP address, and otherwise uses default OSPF configuration on the interface.D、When OSPF is enabled on a working LAN interface on a router, and the router has been elected BDR.E、None of the other answers is correct.
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The Peanut router is able to successfully ping the Serial 0 and Ethernet 0 interface of the Popcorn router, but a ping issued to the Ethernet 1 interface fails. Based on the above output, what are the potential causes of this problem?（）A、The Popcorn router is not forwarding RIP updates.B、The Popcorn router did not include network 192.168.12.0 in its routing configuration.C、The Ethernet1 interface of the Popcorn router is shutdown.D、The clockrate is not present in the configuration of one of the routers.E、The Serial interface of the Popcorn router is not operating.
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What is the reason for configuring a passive interface on a router?（）A、Allows interfaces to share common IP addresses.B、Allows an interface to remain up without the aid of keepalives.C、Allows a router to send routing and not receive updates via that interface.D、Allows a routing protocol to forward updates that is missing its IP address.E、Allows a router to receive routing updates on an interface but not send updates via that interface.
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What must be set correctly when configuring a serial interface so that higher-level protocols calculate the best route?（）A、bandwidthB、delayC、loadD、reliability
考题
When configuring PPP over ATM interfaces, what does the profile utility accomplish?（）A、It binds an interface to a virtual router.B、It allows for dynamic interface creation.C、It assigns a Domain Name Server for a session.D、It identifies the RADIUS server to use for authentication
考题
单选题While logged into a router you manually shut down the serial 0 interface using the "shutdown" interface configuration command. You then issue the "show interface serial 0" command in exec mode. What could you expect the status of the serial 0 interface 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 up
考题
多选题The Peanut router is able to successfully ping the Serial 0 and Ethernet 0 interface of the Popcorn router, but a ping issued to the Ethernet 1 interface fails. Based on the above output, what are the potential causes of this problem?（）AThe Popcorn router is not forwarding RIP updates.BThe Popcorn router did not include network 192.168.12.0 in its routing configuration.CThe Ethernet1 interface of the Popcorn router is shutdown.DThe clockrate is not present in the configuration of one of the routers.EThe Serial interface of the Popcorn router is not operating.
考题
单选题What is the purpose of this command? ip route 0.0.0.0 0.0.0.0 serial0/0（）A
It configures a router to send all packets out interface serial 0/0.B
It configures a router to block routing updates from being sent out interface serial 0/0.C
It configures a router as a firewall, blocking all unauthorized packets from exiting serial 0/0.D
It configures a router to send all packets for unknown destination networks out interface serial 0/0.E
It configures a router to drop all packets for which the destination network is unknown.
考题
单选题A standard access control list has been configured on a router and applied to interface Serial 0 in anoutbound direction. No ACL is applied to Interface Serial 1 on the same router. What will happen whentraffic being filtered by the access list does not match the configured ACL statements for Serial 0？（）A
The traffic is droppedB
The resulting action is determined by the destination IP addressC
The source IP address is checked，and，if a match is not found， traffic is routed out interface Serial 1D
The resulting action is determined by the destination IP address and port number
考题
单选题When configuring PPP over ATM interfaces, what does the profile utility accomplish?（）A
It binds an interface to a virtual router.B
It allows for dynamic interface creation.C
It assigns a Domain Name Server for a session.D
It identifies the RADIUS server to use for authentication
考题
单选题When a router is connected to a Frame Relay WAN link using a serial DTE interface, how is the interface clock rate determined?（）A
It is supplied by the CSU/DSU.B
It is supplied by the far end router.C
It is determined by the clock rate command.D
It is supplied by the Layer 1 bit stream timing.
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