In BGP, what occurs in the open confirm state?

• A. The router found a route to the neighbor and has completed the three-way handshake.
• B. An open message was sent with the parameters for the BGP session.
• C. The router received agreement on the parameters for establishing a session.
• D. Peering is established and routing begins.

Answer: (C)

OpenConfirm is the stage where both BGP peers have exchanged Open messages and agreed on the session parameters (such as AS numbers, hold time, BGP identifier, and any optional capabilities). At this point, the parameters are settled, and the session is being confirmed for establishment. The next step is typically to exchange a KeepAlive to complete the handshake and move into the Established state, where routing updates can start.

That’s why the correct choice reflects that the router has received agreement on the parameters for establishing a session. The other options describe a TCP-level handshake, the earlier Open message exchange, or the final established state where routing actually begins.