A network administrator wants to contr...

单项选择题A network administrator wants to control which user hosts can access the network based on their MAC address. What will prevent workstations with unauthorized MAC addresses from connecting to the network through a switch?（）

A. BPDU
B. Port security
C. RSTP
D. STP
E. VTP
F. Blocking mode

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1.单项选择题A workgroup switch is configured with all ports assigned to VLAN 2. In addition,all ports are configured as full-duplex FastEthernet. What is the effect of adding switch ports to a new VLAN on this switch?（）

A. The additions will create more collision domains.
B. IP address utilization will be more efficient.
C. More bandwidth will be required than was needed previously.
D. An additional broadcast domain will be created.
E. The possibility that switching loops will occur will increase dramatically.

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2.单项选择题Why would a network administrator configure port security on a switch?（）

A. To prevent unauthorized Telnet access to a switch port.
B. To limit the number of Layer 2 broadcasts on a particular switch port.
C. To prevent unauthorized hosts from accessing the LAN.
D. To protect the IP and MAC address of the switch and associated ports.
E. To block unauthorized access to the switch management interfaces over common TCP ports.

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3.单项选择题When a new trunk link is configured on an IOS based switch, which VLANs are allowed over the link?（）

A. All defined VLANs are allowed on the trunk by default.
B. Each VLAN, or VLAN range, that is specified with the switchport mode command.
C. Each VLAN, or VLAN range, that is specified with the vtp domain command.
D. Each VLAN, or VLAN range, that is specified with the vlan database command.

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4.单项选择题What kind of cable should be used to establish a trunked line between two Catalyst 2950 switches?（）

A. a straight-through cable
B. an EIA/TIA-232 serial cable
C. an auxiliary cable
D. a modem cable
E. a cross-over cable

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5.多项选择题What components are required to directly connect two PCs so they are able to participate in a simple peer-to-per network?（）

A. Straight-through cable
B. Compatible network interfaces
C. Networking protocol
D. Hub
E. Crossover cable
F. router

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6.单项选择题Which type of cable should be used to make a connection between the Fa0/0 port on a router and the Fa0/0 port switch?（）

A. Rollover cable
B. Console cab le
C. Crossover cable
D. Straight-through cable
E. Serial cable

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7.多项选择题You are experiencing intermittent issues relating to congestion with your network.What are the possible causes of congestion on a LAN?（）

A. A broadcast domain with too many hosts.
B. Full duplex operation.
C. Broadcast storms.
D. Multicasting.
E. Network Segmentation.
F. Low bandwidth.

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8.多项选择题The LAN needs are expanding at the Testking corporate office, which is quickly growing. You are instructed to enlarge the area covered by a single LAN segment on the TestKing network.Which of the following are layer 1 devices that you can use?（）

A. A switch.
B. A router.
C. A network adapter card.
D. A hub.
E. A repeater.

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9.多项选择题 The TestKing network Topology is displayed in the exhibit below

A switch has been configured for three different VLANs: VLAN 2, VLAN 3, andVLAN 4. For the purposes of communication between VLANs a router is to beadded. Host from one VLAN should be able to reach the hosts in the other VLANs.
Based on this requirement, what type of connection is acceptable between the routerand switch?（）

A. 10 Mbps Ethernet
B. 56 kbps serial
C. 100 Mbps Ethernet
D. 1,544 Mbps serial
E. 1000 Mbps Ethernet

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10.多项选择题 An administrator is configuring a Catalyst switch with VLAN information that must be automatically distributed to other Catalyst switches in the network.
What conditions must be met in order for the VLANs configured on this switch to be automatically configured on the other switches?（）

A. The switch that will share its VLAN configuration must be in VTP server mode.
B. The switches must be in the same VTP domain.
C. The switch that will share the VLAN information must be configured as the root bridge.
D. The switches must be connected over VLAN trunks.
E. The switches must be configured to use the same STP version.
F. The switches must have VTP pruning activated.

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