Cisco Certified Network Associate (200-301 CCNA) – Question240

An engineer must configure interswitch VLAN communication between a Cisco switch and a third-party switch.
Which action should be taken?

A. configure DSCP
B. configure IEEE 802.1q
C. configure ISL
D. configure IEEE 802.1p

Correct Answer: B

Explanation:

Explanation:
VLAN trunking offers two options, ISL and 802.1Q. ISL is Cisco proprietary while 802.1Q is standards based and supported by multiple vendors.