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  3. You are bringing up a new Ezonexam switch, and wish to connect it via a trunk to another switch from a different vendor, which u

You are bringing up a new Ezonexam switch, and wish to connect it via a trunk to another switch from a different vendor, which u

admin2009-05-19  31
问题 You are bringing up a new Ezonexam switch, and wish to connect it via a trunk to another switch from a different vendor, which uses the IEEE standard for the trunking method. When setting the encapsulation type on the trunk, what should you configure on the Cisco switch?
选项 A、Switch(config)# switchport trunk encapsulation isl
B、Switch(config)# switchport trunk encapsulation ietf
C、Switch(config-if)# switchport trunk encapsulation isl
D、Switch(config-if)# switchport trunk encapsulation ietf
E、Switch(config-if)# switchport trunk encapsulation dot1q
答案E
解析 Explanation:
The only real choices for setting up switching trunks are ISL and 802.1Q. ISL is Cisco proprietary, while 802.1Q uses the IEEE defined standard for trunking between switches.

To configure the 802.1Q standard, the keyword "dot1q" is used in Cisco switches.

Incorrect Answers:
A, B, D. These are not valid options in a Cisco switch.

C. ISL is a Cisco proprietary method for setting up trunks, and will only work between Cisco switches.
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