A hacker searches in Google for filetype:pcf to find Cisco VPN config files. Those files may contain connectivity passwords that can be decoded with which of the following?

Cupp (Common User Passwords Profiler) is a wordlist generator that builds custom password dictionaries from personal information, not a tool for decoding obfuscated credentials in PCF files.

Nessus is a network vulnerability scanner used to identify security weaknesses in systems and services, not a password decoding or credential recovery tool.

Cain and Abel includes a built-in Cisco VPN PCF password decoder that reads the enc_GroupPwd field from PCF files and decrypts the obfuscated password using the known Cisco proprietary algorithm. This functionality is specifically designed for recovering credentials stored in Cisco VPN client profile files. No other tool listed provides this targeted PCF decoding capability.

John The Ripper is a hash-cracking tool that works against hashed password formats and does not have native functionality for decoding Cisco PCF file obfuscated passwords.