單項選擇題Which one of the following actions would actually increase congestion on an Ethernet network?（）

A. Increasing the number of collision domains.
B. Micro-segmenting the network.
C. Adding hubs for connectivity to the network.
D. Putting additional switches in the network.
E. Implementing VLANs in the network.


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1.多項選擇題In which Spanning-Tree states does a switch port learn MAC addresses?（）

A. Blocking
B. Listening
C. Forwarding
D. Learning
E. Relaying

2.單項選擇題In a switched LAN network, what is the Spanning-Tree algorithm used for?（）

A. It is used to provide a mechanism for routing updates in switched environments.
B. It is used to prevent routing loops in networks with redundant routes.
C. It is used to prevent switching loops in networks with redundant switched routes.
D. It is used to manage, the addition, deletion, and naming of VLANs across multiple switches.
E. It is used to segment a network into multiple collision domains.
F. None of the above.
G. All of the above are functions of STP.

3.單項選擇題What are the switch and bridge port characteristics of a layer two spanning-tree network that is fully converged?（）

A. All switch and bridge ports are in the forwarding state.
B. All switch and bridge ports are in the stand-by state.
C. All switch and bridge ports are assigned as either root or designated ports.
D. All switch and bridge ports are in either the forwarding or blocking state.
E. All switch and bridge are either blocking or looping.

4.多項選擇題Which of the following are spanning tree port states?（）

A. Learning
B. Spanning
C. Listening
D. Forwarding
E. Initializing
F. Filtering
G. Permitting

5.多項選擇題Which two of the following values does STP take into consideration when it elects the root bridge?（）

A. The BPDU version number
B. The access layer bridge setting
C. The Bridge ID
D. The spanning-tree update number
E. The bridge priority
F. The VLAN number