IGP and EGP Flashcards

1
Q

AS (Autonomous System)

A
  • Autonomous
    • Existing as an independent entity

• Group of IP routes under common control

• RFC 1930, Section 3: Definitions
• “An AS is a connected group of one or more IP
prefixes run by one or more network operators
which has a SINGLE and CLEARLY DEFINED routing
policy.”

• Important point of reference for discussing Interior
Gateway Protocols and Exterior Gateway Protocols

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

IGP (Interior Gateway Protocol)

A

• Used within a single autonomous system (AS)
• Not intended to route between AS
• That’s why there’s Exterior Gateway Protocols
(EGPs)

  • IPv4 dynamic routing
    • OSPFv2 (Open Shortest Path First)
    • RIPv2 (Routing Information Protocol version 2)
    • EIGRP (Enhanced Interior Gateway Routing Protocol)
  • IPv6 dynamic routing
    • OSPFv3
    • EIGRP for IPv6
    • RIPng (RIP next generation)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

EGP (Exterior Gateway Protocol)

A
  • Used to route between autonomous systems
    • Leverages the IGP at the AS to handle local routing
  • BGP (Border Gateway Protocol)
    • Many organizations use BGP as their EGP
How well did you know this?
1
Not at all
2
3
4
5
Perfectly