Knowledge Quest Magazine covers all general knowledge for class 1-8 published this article page no 7 ieee 802.1q differs substantially from isl. in contrast to isl, dot1q does not encapsulate frames. a 4-byte header is added to the frame, resulting in less overhead than isl. if the frame is destined for hosts residing in the native vlan, that header isnt added. since the header is only 4 bytes in size, and isnt even placed on every frame, using dot1q lessens the chance of oversized frames. when the remote port receives an untagged frame, the switch knows that these untagged frames are destined for the native vlan.knowing the details is the difference between passing and failing your ccna and ccnp exams. keep studying, get some hands-on practice, and youre on your way to cisco certification success knowledge questions in english buy.
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