What are three valid BGP message types? (Choose three.)
What are three valid BGP message types? (Choose three.)
The three fundamental BGP message types are Update, Keepalive, and Notification. These message types help manage and maintain BGP sessions. The 'refresh' message referenced in some sources is actually an extension in the form of a capability (route refresh capability) and not a core BGP message. As a result, the valid BGP message types are Update, Keepalive, and Notification. 'Update' messages carry routing information, 'Keepalive' messages ensure that the connection is maintained, and 'Notification' messages indicate errors.
A-D-E are exact : BGP messages are used to establish and maintain BGP peering sessions • All BGP messages use a common header - Open message - Keepalive message - Update message - Notification message - Refresh message
There are no refresh in BGP messages: Open Message. Update Message. Keepalive Message. Notification Message.
"Refresh" is technically true, and it is included in BGP messages: https://networklessons.com/bgp/bgp-route-refresh-capability
Additional info: https://networklessons.com/bgp/bgp-messages "Optional Parameters: here you will find some optional capabilities of the BGP router. This field has been added so that new features could be added to BGP without having to create a new version.Things you might find here are: support for MP-BGP (Multi Protocol BGP). support for Route Refresh. support for 4-octet AS numbers."
The three valid BGP (Border Gateway Protocol) message types are: A. refresh D. keepalive E. update These messages serve different purposes within the BGP protocol: Refresh: Used for the route refresh capability in BGP to request the exchange of all routing information. Keepalive: Sent periodically between BGP peers to maintain the connection and verify that the neighbor is reachable. Update: Carries routing information and is used to advertise new routes or withdraw previously advertised routes.