What is the default authentication in RIPv2 when authentication is enabled?
A. SHA1 authentication
B. Enable password authentication
C. Plain text authentication
D. MD5 authentication
What is the default authentication in RIPv2 when authentication is enabled?
C
https://www.cisco.com/c/en/us/support/docs/ip/routing-information-protocol-rip/13719-50.html
Plain text authentication mode is the default setting in every RIPv2 packet, when authentication is enabled.