also adds a second 4-byte frame check sequence (FCS) field at the end of the
frame. Because the frame has been encapsulated by ISL with information,
only ISL-aware devices can read it. These frames can be up to a whopping
1522 bytes long, and devices that receive them may record them as a giant
frame because it's over the maximum of 1518 bytes allowed on an Ethernet
segment.
tagged with multiple VLANs so they can traverse multiple VLANs without
going through a router. This is good because it reduces latency. ISL makes it
easy for users to access servers quickly and efficiently without having to go
through a router every time they need to communicate with a resource. This
technology can also be used with probes and certain network analyzers,
and administrators can use it to include file servers in multiple VLANs
simultaneously.
the frame if the frame is forwarded out an access link--this is an important
ISL fact, so make a mental note, and don't forget it!
work. VTP allows an administrator to add, delete, and rename VLANs--
information that is then propagated to all switches in the network.
ATM LANE or FDDI