oftentimes in texts 802.1q tagging will be referred to as encapsulation... this is confusing and a complete falsehood, as we know... with 802.1q there is no such thing as encapsulating the frame... injection, insertion, anything but encapsulation...
isl actually encapsulates the frame... it would be nice if isl, among others, would finally be allowed to die... many cisco ios's and platforms no longer support isl... it had it's time, served it's purpose, and now needs to be finally laid to rest...
encapsulate: to place in or as if in a capsule
inject: to introduce
insert: to put or place in
historically, cisco will fill a protocol need before the standards bodies, ie, pvst... the standards organizations will eventually come up to speed and make obsolete the proprietary protocol... for progress' sake, this is good... cisco just needs to learn when to let go, like dtp, vtp, pagp, et al...
i firmly believe learning about network artifacts is worthwhile from the point of view of history and context, but i also believe that the in's and out's of them should not be testable...
network cisco ccna gns3 certification arteq
a network runs through it
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