Which port number is commonly associated with Kerberos authentication?

Which port number is commonly associated with Kerberos authentication?

• A. 88
• B. 2049
• C. 161
• D. 512

Answer: (A)

Port numbers map services to well-known network functions, and Kerberos authentication uses a specific default port. Kerberos relies on port 88 as its standard communication channel between clients and the Key Distribution Center. This includes both UDP and TCP connections, with UDP typically used for initial requests and TCP available when reliability or larger ticket exchanges are needed. Because 88 is the designated port for Kerberos, it’s the correct choice for identifying Kerberos authentication. The other options point to different services: 2049 is associated with NFS, 161 with SNMP, and 512 corresponds to a legacy remote command service used by older remote shells. These are unrelated to Kerberos, which is why 88 is the best answer.

Port numbers map services to well-known network functions, and Kerberos authentication uses a specific default port. Kerberos relies on port 88 as its standard communication channel between clients and the Key Distribution Center. This includes both UDP and TCP connections, with UDP typically used for initial requests and TCP available when reliability or larger ticket exchanges are needed. Because 88 is the designated port for Kerberos, it’s the correct choice for identifying Kerberos authentication.

The other options point to different services: 2049 is associated with NFS, 161 with SNMP, and 512 corresponds to a legacy remote command service used by older remote shells. These are unrelated to Kerberos, which is why 88 is the best answer.