Exam 200-120 Topic 1 Question 91 Discussion

Actual exam question for Cisco's 200-120 exam
Question #: 91
Topic #: 1
In a switched environment, what does the IEEE 802.1Q standard describe?

Suggested Answer: B Vote an answer

A broadcast domain must sometimes exist on more than one switch in the network. To accomplish this, one switch must send frames to another switch and indicate which VLAN a particular frame belongs to. On Cisco switches, a trunk link is created to accomplish this VLAN identification. ISL and IEEE 802.1Q are different methods of putting a VLAN identifier in a Layer 2 frame. The IEEE 802.1Q protocol interconnects VLANs between multiple switches, routers, and servers. With 802.1Q, a network administrator can define a VLAN topology to span multiple physical devices. Cisco switches support IEEE 802.1Q for FastEthernet and Gigabit Ethernet interfaces. An 802.1Q
trunk link provides VLAN identification by adding a 4-byte tag to an Ethernet Frame as it leaves a trunk port.

by Olive at Dec 12, 2023, 12:46 AM

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