多項(xiàng)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


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1.多項(xiàng)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

2.單項(xiàng)選擇題What is the purpose of the spanning-tree algorithm in a switched LAN?（）

A. To provide a monitoring mechanism for networks in switched environments.
B. To manage VLANs across multiple switches.
C. To prevent switching loops in networks with redundant switched paths.
D. To segment a network into multiple collision domains.
E. To prevent routing loops in networks.

3.單項(xiàng)選擇題By default, which of the following factors determines the spanning-tree path cost?（）

A. It is the individual link cost based on latency
B. It is the sum of the costs based on bandwidth
C. It is the total hop count
D. It is dynamically determined based on load

4.單項(xiàng)選擇題Which OSI layer header contains the address of a destination host that is another network?（）

A. application
B. presentation
C. session
D. transport
E. network
F. data link
G. physical

6.單項(xiàng)選擇題Which of the following layers of the TCP/IP model most closely corresponds to the network layer of the OSI model?（）

A.Application
B.Internet
C.Transport
D.Network
E.Data Link

7.多項(xiàng)選擇題Which three of the protocols below belong to the application layer?（）

A.ARP
B.HTTPS
C.SMTP
D.CDP
E.TFTP
F.ICMP

8.多項(xiàng)選擇題Which three of the following OSI model layers also belong to the TCP/IP model?（）

A. The application layer
B. The session layer
C. The data link layer
D. The transport layer
E. The network interface layer
F. The physical layer

9.單項(xiàng)選擇題Which one of the following is the most commonly used layer 2 network device?（）

A. Hub
B. Bridge
C. Switch
D. Router
E. Repeaters
F. None of the above

10.多項(xiàng)選擇題In the OSI model, at which layers do WANs operate at?（）

A.Applicationlayer
B.Presentationlayer
C.Sessionlayer
D.Transportlayer
E.Networklayer
F.Datalinklayer
G.Physicallayer