Q7. Which of the following is NOT a type of message that a BGP common Header will contain?
A. OPEN message
B. UPDATE message
C. ROUTEBUSY message
D. KEEPALIVE message
Correct Answer: C
The following are the four possible message types in a BGP header:
Type 1: OPEN message - This is the first message sent after TCP session is established.
Type 2: UPDATE message - An UPDATE message contains a new route or a route to be withdrawn or both. Note that only one new route can be advertised with one UPDATE message.
Type 3: NOTIFICATION message - this message is sent if an error occurs during a BGP session. This message can be used to troubleshoot the problem.
Type 4: KEEPALIVE message - KEEPALIVE message is used to confirm that the connection between the neighboring routers is still active.
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