Which of the following is a characteristic of BGP?

a. Not designed for routing between separate organizational networks
b. An external routing protocol
c. Uses ASNs
d. Uses UDP

b. An external routing protocol and c. Uses ASNs
Explanation: BGP is considered to be an external routing protocol. This protocol is designed for routing between separate organizational networks. The BGP term for these networks is autonomous systems, or AS. An AS is assigned an ASN (AS number). BGP uses TCP to establish peering and to exchange messages and routes.