Switch

Switch

1. Receive incoming link-layer frames and forward them onto outgoing links

2. Transparent

   • Host
   • Routers
   • Subnet

3. Functions

   • Filtering
     • Determines whether a frame should be forwarded to some interface or should just be dropped
   • Forwarding
     • Determines the interfaces to which a frame should be directed, and then moves the frame to those interfaces

4. Switch Table

   • Contains entries for some, but not necessarily all, of the hosts and routers on a LAN
     • MAC Address
     • Switch Interface
     • Time
   • Automatically
   • Dynamically
   • Autonomously

5. Self-Learning

6. Properties

   • Elimination of collisions
   • Heterogeneous links
   • Management