Is it true that only MD5 authentication is supported between BGP peers?

The statement that only MD5 authentication is supported between BGP peers is not accurate. BGP (Border Gateway Protocol) can indeed utilize MD5 for authentication, but it is not limited to this method alone. The purpose of using MD5 is to secure BGP sessions by ensuring that the peers can authenticate each other and prevent unauthorized access to the BGP sessions.

Many implementations of BGP support additional security measures and protocols, which can also include other forms of authentication beyond MD5, though MD5 is a commonly used option. Hence, MD5 is not the only method for authenticating BGP peers, making the assertion that only MD5 is supported incorrect. The flexibility in authentication mechanisms allows network administrators to choose the method that best fits their security requirements and the specific capabilities of their network hardware and software.

Given this understanding, the correct answer to the question is that it is false that only MD5 authentication is supported between BGP peers.