Q2: Your switched network is using Inter-Switch Link (ISL) as VLAN trunking protocol. Which following must be a part of ISL header field?
A. Source Port Number
B. VLAN-ID
C. Destination port number
D. Destination network number
Correct Answer: B
Explanation:
Inter-Switch Link (ISL) is one of the VLAN trunking protocols used for switched VLAN networks. It uses frame tagging to identify the VLAN. ISL encapsulates the original Ethernet frame, and a VLAN-ID is inserted into the ISL header.
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