思科CCNA考试截屏题库（六）

来源：思科认证发布时间：2012-11-09 思科认证视频评论

A: Connecting a host to the old switch has created a broadcast storm.

B: The 10BASE-T switch forced the entire network to be reduced to 10 Mbps operation.

C: The old switch does not support VLANs, which has disabled the VLAN configuration of the entire the network.

D: The old switch does not support full-duplex operation, effectively forcing half-duplex operation throughout the network.

E: Spanning Tree Protocol has elected the old switch as the root bridge, creating inefficient data paths through the switched network.

Correct Answers: E

Refer to the graphic. Host A is communicating with the server. What will be the source MAC address of the frames received by Host A from the server?

A: the MAC address of router interface e0

B: the MAC address of router interface e1

C: the MAC address of the server network interface

D: the MAC address of host A

Correct Answers: A

Refer to the graphic. Host A has established a connection with the HTTP server attached to interface E0 of the xyz router. Which of the following statements describe the information contained in protocol data units sent from host A to this server? (Choose three.)

A:The destination port number in a segment header will have a value of 80.

B:The destination port number in a segment header will have a unique value greater than or equal to 1023.

C:The destination address of a frame will be the MAC address of the HTTP server interface.

D:The destination address of a frame will be the MAC address of the E0 interface of the abc router.

E:The destination IP address of a packet will be the IP address of the E0 interface of the abc router.

F:The destination IP address of a packet will be the IP address of the network interface of the HTTP server.

Correct Answers: A, D, F

What is the purpose of the command shown below?vtp password Fl0r1da

A: It is used to validate the sources of VTP advertisements sent between switches.

B: It is used to access the VTP server to make changes to the VTP configuration.

C: It allows two VTP servers to exist in the same domain, each configured with different passwords.

D: It is the password required when promoting a switch from VTP client mode to VTP server mode.

E: It is used to prevent a switch newly added to the network from sending incorrect VLAN information to the other switches in the domain.

Correct Answers: A

Which statement describes a spanning-tree network that has converged?

A: All switch and bridge ports are in the forwarding state.

B: All switch and bridge ports are assigned as either root or designated ports.

C: All switch and bridge ports are in either the forwarding or blocking state.

D: All switch and bridge ports are either blocking or looping.

Correct Answers: C

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

Correct Answers: B

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