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电梯直达

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发表于 2011-01-18 10:45 |只看该作者 |倒序浏览

最新640-822题库分享1. Refer to the exhibit. Pierre has just installed the mail server and Switch2. For security reasons UDP packets arenot permitted outbound on the Fa0/1 router interface. Pierre is now at his workstation testing the new installation andis not able to establish SMTP communication to the mail server.What is the most likely cause for lack of communication between Pierre's workstation and the mail server?A. The crossover cable should be a straight-through cable.B. UDP is blocked coming out of the Fa0/1 interface on the router.C. The server should be directly connected to the router.D. The IP addresses are all on the same network. No router is required.Answer: A2. Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?A. Serial0/1 is up, line protocol is upB. Serial0/1 is up, line protocol is downC. Serial0/1 is down, line protocol is downD. Serial0/1 is administratively down, line protocol is downAnswer: C3. Refer to the exhibit. Two buildings on the San Jose campus of a small company must be connected to useEthernet with a bandwidth of at least 100 Mbps. The company is concerned about possible problems from voltagepotential differences between the two buildings. Which media type should be used for the connection?A. UTP cableB. STP cableC. coaxial cableD. fiber optic cableAnswer: D4. Refer to the exhibit. A network device needs to be installed in the place of the icon labeled Network Device toaccommodate a leased line attachment to the Internet. Which network device and interface configuration meets theminimum requirements for this installation?A. a router with two Ethernet interfacesB. a switch with two Ethernet interfacesC. a router with one Ethernet and one serial interfaceD. a switch with one Ethernet and one serial interfaceE. a router with one Ethernet and one modem interfaceAnswer: C5. Refer to the exhibit. A network technician has added host A to the network. Host A cannot communicate on thenetwork. A ping that is issued on the host to address 127.0.0.1 fails. What is the problem?A. The router is not forwarding the ping packets to network 127.0.0.0.B. The remote host at 127.0.0.1 is unreachable.C. The default gateway is incorrect.D. The IP address of host A is incorrect.E. The TCP/IP protocols are not loaded.Answer: E6. Refer to the exhibit. A network administrator has configured a Catalyst 2950 switch for remote management by pasting into the console the configuration commands that are shown in the exhibit. However, a Telnet session cannot be successfully established from a remote host. What should be done to fix this problem?A. Change the first line to interface fastethernet 0/1.B. Change the first line to interface vlan 0/1.C. Change the fifth line to ip default-gateway 192.168.17.241.D. Change the fifth line to ip route 0.0.0.0 0.0.0.0 192.168.17.1.E. Change the sixth line to line con 0.Answer: C7. Refer to the exhibit. The wire scheme that is shown is terminated at each end with an RJ-45 connector. What cable type does the wire diagram represent?A. an Ethernet straight-through cableB. a serial crossover cableC. a serial straight-through cableD. an Ethernet crossover cableE. a rollover cableAnswer: D8. Refer to the exhibit. A network has been planned as shown. Which three statements accurately describe the areas and devices in the network plan? (Choose three.)A. Network Device A is a switch.B. Network Device B is a switch.C. Network Device A is a hub.D. Network Device B is a hub.E. Area 1 contains a Layer 2 device.F. Area 2 contains a Layer 2 device.Answer: ADE9. Refer to the exhibits labeled A through E. All devices are to be connected over Ethernet. Which three device-to-device configurations are likely to require the use of a crossover connection? (Choose three.)A. exhibit AB. exhibit BC. exhibit CD. exhibit DE. exhibit EAnswer: ADE10. An Ethernet cable is attached to a PC NIC and then attached to a switch port. The PC power is turned on and the switch port link LED turns green. The link light indicates what two conditions? (Choose two.)A. Layer 2 communication has been established between the PC and switch.B. The PC has received a DHCP address.C. Traffic is being sent from the switch to the PC.D. If flashing, the green LED indicates port speed of 100 Mb/s.E. The Layer 1 media is functioning between the PC and switch.F. The switch port is functioning as a half-duplex connection.Answer: AE