{
  "port": 7911,
  "protocol": "tcp",
  "service": "Unassigned",
  "oneLiner": "Unassigned at IANA, inside the empty 7904-7912 block — no standard service claims it.",
  "whatItIs": "IANA leaves 7904 through 7912 unassigned, so 7911 has no registered name; Nmap likewise records it as unknown, open on roughly 0.04% of scanned hosts. The next registration up is 7913 (qo-secure). Nothing common binds 7911 by default, so a listener is a local choice.",
  "exposure": {
    "verdict": "careful",
    "note": "No registration, no expectations — find the process behind it and rate that service rather than the number."
  },
  "checkCommand": "sudo lsof -nP -iTCP:7911 -sTCP:LISTEN",
  "links": [
    {
      "title": "IANA port registry — 7911 (unassigned)",
      "url": "https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=7911",
      "kind": "iana"
    }
  ]
}