Encrypted Inbound Traffic on TCP Port 465: Identifying the Reason | CompTIA CySA+ CS0-002 Exam Solution

B.

Based on the information provided, the security analyst has noticed that encrypted inbound traffic on TCP port 465 is coming into the company's network from a database server. Here are the possible options for identifying the reason for this traffic:

A. The server is configured to communicate on the secure database listener port.

This option suggests that the traffic is related to the database server and that the port used is a secure database listener port. This is a valid possibility since many database servers use encrypted communication protocols to secure their transmissions. Secure database listener ports are used for secure connections between the database and clients, and they typically use encryption mechanisms like SSL or TLS to secure the connection. Therefore, this option could be a potential reason for the traffic on this port.

B. Someone has configured an unauthorized SMTP application over SSL

This option suggests that the traffic is related to an unauthorized SMTP application that is using SSL to encrypt its communication. SMTP is a protocol used for email communication, and SSL is a secure communication protocol. However, this option seems less likely since the question mentions that the traffic is coming from a database server, which suggests that the traffic is not related to email communication.

C. A connection from the database to the web front end is communicating on the port

This option suggests that the traffic is related to a connection between the database server and the web front end, and that the communication is taking place on the port in question. This option seems less likely since the question mentions that the traffic is inbound and coming from the database server, which suggests that the communication is not initiated by the web front end.

D. The server is receiving a secure connection using the new TLS 1.3 standard.

This option suggests that the traffic is related to a secure connection using the new TLS 1.3 standard. TLS is a secure communication protocol used to encrypt data transmissions, and version 1.3 is the latest version of TLS. This option is a valid possibility since the traffic is encrypted, and TLS 1.3 is a secure communication protocol that can be used to encrypt traffic on this port.

Based on the options provided, option A seems to be the most likely reason for the traffic on this port since it relates to a secure database listener port. However, option D is also a valid possibility since it relates to a secure connection using the latest TLS protocol.