The desktop review

Then hand the ticket to the network track.

Sources and go deeper

Agent Desktop. vendor. last checked 2026-10.
Technical requirements PDF. vendor. last checked 2026-10. Fetched for this lab in October 2026. Re-read before you buy hardware or open a firewall.
IANA service names and port numbers. ports. last checked 2026-10.
RFC 3261, SIP: Session Initiation Protocol. rfc. last checked 2026-10.
RFC 8446, TLS 1.3. rfc. last checked 2026-10.
RFC 6455, The WebSocket Protocol. rfc. last checked 2026-10.
RFC 1918, private internet addresses. rfc. last checked 2026-10.
RFC 4787, NAT behavior for UDP. rfc. last checked 2026-10.