Pentest results indicate that voice over IP traffic is traversing a network. Which of the following tools will decode a packet capture and extract the voice conversations?

Cain and Abel includes a dedicated VoIP sniffer module that captures RTP audio streams associated with SIP-based calls, reassembles the audio data from the packet sequence, and allows playback of the reconstructed voice conversation - making it the appropriate tool for extracting voice content from a packet capture on a VoIP-enabled network.

John the Ripper is a password hash cracking tool focused on offline dictionary and brute-force attacks against credential files, with no capability to parse or decode VoIP protocols.

Nikto is a web server vulnerability scanner that performs HTTP-based enumeration and testing and has no functionality for capturing or decoding RTP or SIP traffic.

Hping is a packet crafting and network probing utility used to construct and send custom packets for testing purposes, not to capture or decode live VoIP audio streams.