CCNA、CCNP、CCIE模拟试题(2)

11.Which command enables an EtherChannel bundle on a Catalyst 2900XL switch?

A. Port group B. Set port channel on C. Port etherchannel enable D. Set etherchannel port enable

12.Which two statements about dynamic VLANs are true? (Choose two)

A. Each switch port is assigned to a specific VLAN. B. Dynamic VLANs require a VLAN Membership Policy Server. C. Devices are in the same VLAN regardless of which port they attach to. D. Dynamic VLAN assignment are made through the command interface.

13.Which statement is correct about 802.1Q trunking? (Select all that apply)

A. Both switches must be in the same VTP domain. B. The encapsulation type of both ends of the trunk does not have to match. C. The native VLAN on both ends of the trunk must be VLAN 1. D. 802.1Q trunking can only be configured on a Layer 2 port. E. In 802.1Q trunking, all VLAN packets are tagged on the trunk link, except the native VLAN.

14.You need to take advantage of FastEthernet ports. Which two actions avoid configuration problems that cause the port to be automatically disabled? (Choose two)

A. Allow some ports in a channel to be disabled. B. Configure the ports in a channel as dynamic VLAN ports. C. Configure all ports in a channel to operate at the same speed and duplex mode. D. Assign all ports in a channel to the same VLAN or configure them as trunk ports.

15.What is the cause of jitter?

A. Variable queue delays B. Packet drops C. Transmitting too many small packets D. Compression

- BCRAN

16.Regarding DHCP, DHCP relay and DHCP server are mutually exclusive.

A. None of the choices. B. True C. False only for certain IOS version D. False E. False only for IOS version below V10

17.A LAPD Address field can be 1 or 2 bytes long.

A. True B. False C. True only in the US D. True only in Asia E. True only in Europe

18.Which of the following are valid functions of the lock DTE modem attribute (Choose all that apply)?

A. Disable UART. B. Enable UART. C. Locks the data speed between the computer motherboard and the RS232 port. D. Locks the data speed between the modem and the DTE device.

19.Which of the following are not the valid types of ATM addresses (Choose all that apply)?

A. DCC B. GCT C. BSP D. ICD E. NSAP F. AED

20.Which of the following are NOT the valid types of X.25 PLP packet fields (Choose all that apply)?

A. User Data B. LCI C. GFI D. PTI E. None of the choices.

- CIT

21.You are a technician at ABC.com. Your newly appointed ABC trainee wants to know what the similarities between Topology Diagrams and Network Configuration Tables are. What would your reply be? (Choose all that apply.)

A. Both share few components. B. Both share many of the same components. C. Both define physical memory components. D. Both are used for troubleshooting. E. Both use lines and symbols to represent network components.

22.You are a technician at ABC.com. Your newly appointed ABC trainee wants to know what the default action for the output of debug and system error messages is. What would your reply be?

A. Output goes to the remote console if logging is off. B. Output is sent to the console terminal. C. Error logging automatically invokes debug output to the designated TFTP server.