The Molex 0442480085 is a 2-port stacked modular jack from the 44248 series, wired 8p8c for standard RJ45 Ethernet.
Shielding and Grounding — Why the EMI Finger Matters
This jack is shielded and carries an EMI finger — a spring contact that presses against the panel cutout or chassis ground when the connector is mounted. That finger creates a low-impedance bond between the jack's metal shell and the enclosure, bleeding common-mode noise from the cable shield before it reaches the PCB ground plane. For an Ethernet port in an electrically noisy cabinet or near a motor drive, that ground path is what keeps the link up and the radiated emissions within Class A limits.
Board Lock — Why It Is There
The board lock is a pair of barbed posts that snap into plated-through holes on the PCB. During wave solder the lock holds the jack square to the board.