Chapter 12: Advanced BGP

Question 1

AS Path Access Control List

Answer 1

An ACL based on regex for identifying BGP routes based on the AS path and used for direct filtering or conditional matching in a route map

Question 2

BGP Community

Answer 2

A well-known BGP attribute that allows for identifications of routes for later actions such as identification of source or route filtering/modification

Question 3

BGP Multihoming

Answer 3

A method of providing redundancy and optimal routing that involves adding multiple links to external autonomous systems

Question 4

Distribute List

Answer 4

A list used for filtering routes with an ACL for a specific BGP neighbor

Question 5

Prefix List

Answer 5

A method of selecting routes based on binary patterns, specifically the high-order bit pattern, high-order bit count, and an optional prefix length parameter.

Question 6

Regex

Answer 6

Regular Expression, Search patterns that use special key characters for parsing and matching

Question 7

Route Map

Answer 7

A feature used in BGP (and other IGP components) that allows for filtering or modification of routes using a variety of conditional matching

Question 8

Transit Routing

Answer 8

The act of allowing traffic to flow from one external autonomous system through your autonomous system to reach a different external autonomous system.