Border Gateway Protocol (BGP) Flashcards
1
Q
When was the first version of BGP brought forth?
A
1989
2
Q
What is BGP?
A
Border Gateway Protocol.
- interdomain routing protocol
- connects ASs/domains (such as an ISP)
3
Q
What are two types of BGP?
A
- IBGP for internal routing in a trusted, controlled domain
- EBGP for external routing, such as between ASs
4
Q
What are BGP’s two primary functions?
A
- prevent loops between domains
- advertise domain reachability
5
Q
What are the 7 BGP-4 functions?
A
CTRL-C(A)PS
- creates Classless IP Routing (CIDR)
- provides route aggregation
- eliminates routing loops
- leverages policy routing
- faster convergence and larger routing tables
- authentication and encryption
- TCP connection to communicate with BGP peers
6
Q
How does BGP influence best path selection?
A
- learning multiple paths for routes from internal and external BGP peers
- picking the best path and installing it in the routing table
7
Q
Why do routers employ BGP?
A
To exchange appropriate levels of information
8
Q
How many versions of BGP have there been from 1989 to 1994?
A
4
9
Q
BGP address the historical problems of ____ and supports current ___ for the Internet.
A
EGP, EGP
