9
Xport Approaches -- Wormhole Switching
•Worm-hole
routers send entire message as a single packet -- dynamically circuit
switched
•Eliminates
the overhead of set-up and tear-down
•Fully
exploits pipelining, minimizes overhead of headers
•Monopolizes
resources and penalizes short messages
•Messages
delivered in order of transmission
•WH is
the most popular transmission method of communication networks -- simple
•Compromise
schemes
•Large,
e.g. page, variable length packets
•Allow
small messages to “play through”