In which Spanning-Tree states does a switch port learn MAC a

【名词&注释】

应用层(application layer)、物理层(physical layer)、会话层(session layer)

[多选题]In which Spanning-Tree states does a switch port learn MAC addresses? (Select two)

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

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学习资料：

[单选题]在OSI七层模型中，介质工作在哪一层()

A. 传输层
B. 会话层
C. 物理层
D. 应用层

[单选题]100baseT的速率是()Mbit/s

A. 1
B. 10
C. 100
D. 1000

[单选题]RIP协议的管理距离是（）

A. 100
B. 110
C. 120
D. 150

[多选题]How could the Ezonexam corporation benefit from using VLANs on their network?(Select three answer choices.)

A. VLANs allow access to network services based on department, not physical location.
B. VLANs utilize packet filtering to enhance network security.
C. VLANs provide a low-latency, high bandwidth internetworking alternative.
D. VLANs provide a method of communication between IP addresses in large networks.
E. VLANs establish segmented broadcast domains in switched networks.
F. F. VLANs can greatly simplify adding, moving, or changing hosts on the network.

[单选题]After working all night and successfully configuring a Cisco router for the Ezonexam network you save your changes on the startup config, reboot the router, and go out for a cigarette. When you return, none of your changes are active and the router boots to the initial configuration mode! Which of the choices below indicates the source of your problem?

A. Hardware failure in NVRAM prevents the router from loading the config
B. Startup-config in flash is corrupt and cannot be analyzed
C. Router configuration-register set to bypass startup configuration
D. Startup-config in NVRAM is corrupt and cannot be analyzed
E. None of the above

[单选题]Your network uses the172.12.0.0 class B address. You need to support 459 hosts per subnet, while accommodating the maximum number of subnets. Which mask would you use?

A. 255.255.0.0.
B. 255.255.128.0.
C. 255.255.224.0.
D. 255.255.254.0.
E. None of the above

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