Final answer:
The command to see the decrypted pass4SymmKey value in Splunk is 'Splunk show-decrypted-pass4symmkey', accessible via the CLI by authorized personnel due to its sensitive nature.
Step-by-step explanation:
To see the decrypted pass4SymmKey value, which is used typically in the context of Splunk Enterprise Security for encrypted communication between cluster members, the Splunk command-line interface (CLI) provides a tool. On a Splunk instance, the command that can be used to view the decrypted value of pass4SymmKey is generally part of the Splunk show-decrypted-pass4symmkey command. This command reveals the password used for symmetric key encryption. However, it's crucial to note that access to this command is restricted due to the sensitive nature of the information it reveals, and it should only be used by authorized personnel.