Today’s Routers

• Four classes (distinctions not always clear)

• • Backbone ($100K - $500K or more)
  • Medium / large enterprise ($15K - $150K)
  • Small enterprise ($1K - $20K)
  • Residential (< $200)
  • • Cable, DSL, set top boxes, etc.

• Just about all IP stacks can do routing

• • Its hard to build one that doesn’t!
  • Win98 SE, Win2K, WinXP, FreeBSD, and Linux PCs make nice small routers