單項(xiàng)選擇題While troubleshooting a connectivity problem on the network, you issue the ping command from your PC command prompt, but the output shows "request times out."At which OSI layer is this problem associated with?（）

A. The data link layer
B. The application layer
C. The access layer
D. The session layer
E. The network layer


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1.單項(xiàng)選擇題You are logged into a router and with to view the layer 3 information about your neighboring Cisco routers. What IOS command gives layer 3 information for of the directly connected router interfaces?（）

A. show ip links
B. show cdp neighbor
C. show cdp neighbor detail
D. show ip clients
E. show ip route
F. None of the above

2.單項(xiàng)選擇題In the context of configuring dial-on-demand routing using ISDN, what is the purpose of the dialer-list command?（）

A. to identify valid numbers for incoming calls
B. to define the type of ISDN switch at the central office
C. to specify the list of outgoing phone numbers used by the router
D. to associate a dial configuration with a physical interface
E. to define interesting traffic that will enable the link

3.單項(xiàng)選擇題A network administrator needs to configure a router for a Frame Relay connection to a non-Cisco router. Which of the following commands will prepare the WAN interface for this connection?（）

A. Router(config-if)# encapsulation frame-relay q933a
B. Router(config-if)# encapsulation frame-relay ansi
C. Router(config-if)# encapsulation frame-relay ietf
D. Router(config-if)# encapsulation frame-relay isl
E. None of the above

4.多項(xiàng)選擇題Which statements are true about EIGRP successor routes?（）

A. A successor route is used by EIGRP to forward traffic to a destination.
B. Successor routes are saved in the topology table to be used if the primary route fails.
C. Successor routes are flagged as "active" in the routing table.
D. A successor route may be backed up by a feasible successor route.
E. Successor routes are stored in the neighbor table following the discovery process.
F. Successors are not used in EIGRP.

5.單項(xiàng)選擇題You are troubleshooting a frame relay connection and wish to view the LMI traffic stats. Which command should you issue?（）

A. Show interface lmi
B. Show frame-relay lmi
C. Show interface frame-relay
D. Debug frame-relay interface.

8.單項(xiàng)選擇題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.

9.多項(xiàng)選擇題Which of the following can LCP successfully negotiate during the establishment of a PPP connection?（）

A. Q.931
B. IPCP
C. multilink
D. CHAP
E. callback

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The network 172.12.0.0 needs to be divided into subnets where each subnet has the capacity of 458 IP addresses.What would be the correct subnet mask to accomplish this division keeping the number of subnets at the maximum? （）

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What is a global command?（）

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Five minutes after issuing the show running-config command, a technician enters the command again and notices that several access list statements have been altered. Because of this, the technician believes that the router is being configured by an unknown person through Telnet. Before changing the router passwords, the technician would like to discover if anyone is connected to the router by Telnet and stop them from making further changes.Which commands will accomplish these options?（）

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What feature of a networks switch allows an administrative to create separate broadcast domains?（）

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What is the subnetwork address for a host with IP address 201.100.5.68/28?（）

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Which of the following host addresses are member of networks that can be routed across the public Internet? （）

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How many usable sub network and usable hosts per subnet result in the network address 201.105.13.0 is sub netted with a mask of /26? （）

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What is the purpose of pressing the Ctrl+Break keys during the router password recover procedure?（）

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An administrator would like to configure a switch over a virtual terminal connection from locations outside of the local LAN. Which of the following are required in order for the switch to be configured from a remote location? （）

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Which of the following contribute to congestion on an Ethernet network?（）

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