Which of the following statements regarding BGP is false?

BGP, or Border Gateway Protocol, is primarily known as an exterior gateway protocol, not an interior routing protocol. It functions to exchange routing information between different Autonomous Systems (ASs) on the internet. This differentiates it from interior routing protocols, which manage routing within a single AS.

The assertion that BGP is an exterior routing protocol and supports the exchange of routing information between ASs accurately reflects its fundamental purpose, making it a key component of the internet's backbone infrastructure. Additionally, stating that BGP is a path vector protocol highlights its characteristic of maintaining the path information that gets updated dynamically as the network topology changes.

While BGP does have certain capabilities related to multicast routing, such as BGP-MP (Multiprotocol BGP), its primary function is suited for unicast routing decisions between ASs. Hence, stating that BGP is an interior routing protocol misrepresents its essential role in the broader network routing landscape.

Thus, the choice indicating that BGP is an interior routing protocol is the false statement among the options provided.