Exam 300-410 topic 1 question 620 discussion

I go with D because it says "TCP". OSPF doesn't use TCP, and NTP uses UDP. BGP is the only one that uses TCP here.

This log message is displayed for return traffic from a router that does not have MD5 authentication configured for BGP If a router has a password configured for a neighbor, but the neighbor router does not, a message such as this is displayed while the routers attempt to establish a BGP session between them: %TCP-6-BADAUTH: No MD5 digest from [peer's IP address]:11003 to [local router's IP address]:179 10.40.1.2 is Denver's address Must configure MD5 authentication on the WAN router 10.40.1.1 https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/112188-configure-md5-bgp-00.html#:~:text=This%20document%20describes%20how%20to%20configure%20Message%20Digest5

D is corerct but it must be done on both routers, however since we have only one option to choose D is correct anyway https://community.cisco.com/t5/switching/tcp-6-badauth-no-md5-digest/td-p/1627116

D is corerct but it must be done on both routers, however since we have only one option to choose D is correct anyway https://community.cisco.com/t5/switching/tcp-6-badauth-no-md5-digest/td-p/1627116

given answer is correct, Denver router messing the authentication config as shown in the error message.

answer is d