Terminology

• Autonomous System (AS)

• • A network or group of networks under a single administrative entity
  • • ISP, corporation, university, etc

• Interior Gateway Protocol (IGP)

• • A protocol for routing traffic within a single autonomous system
  • • E.g., RIP, OSPF
    • AKA “Interior Routing Protocol”

• Exterior Gateway Protocol (EGP)

• • A protocol for routing traffic between autonomous systems
  • • E.g., EGP, BGP
    • AKA “Exterior Routing Protocol”