單項選擇題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


您可能感興趣的試卷

你可能感興趣的試題

1.單項選擇題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.

2.單項選擇題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.

3.單項選擇題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.

4.單項選擇題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

5.多項選擇題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