An administrator is no longer receiving alerting messages from the web server platform that recently failed over to a new secondary datacenter due to a power failure. Which of the following is the…

Port 21 is for FTP, which is rarely used for sending alerting messages from a web server or for general log transfer to a log server.

The web server platform sends alerting messages and logs to a designated log server, often utilizing secure protocols like SFTP or secure log forwarding over SSH, which commonly uses Port 22. If Port 22 is blocked outbound from the new secondary datacenter's network, the web server cannot establish a connection to the log server, preventing the delivery of critical alerts and logs.

Port 162 is for SNMP traps, which are typically received by an SNMP manager, not blocked inbound to the web server that is sending the alerts.

While Port 162 is for SNMP traps and a block outbound could prevent sending, Port 22 for secure log transfer to a 'log server' is a more general and common mechanism for 'alerting messages' from a 'web server platform' than SNMP traps, especially when transferring to a centralized log server.