What port is this?

this is a slot for a wireles PCI card, hope this answers your question good luck

It’s a Docking Station/Port Replicator port. You can purchase an external Docking Station to add additional ports to your laptop or use it as a “desktop at home” solution. Computer companies made this so that you don’t have to unplug several units from your laptop when you want to transport your computer to a different location; you only have to unplug that one port instead of seven, not to mention it makes your laptop easier to take on the go. It’s a really good idea if you utilize its function. Here’s what a Docking Station/Port Replicator looks like.

http://nxn.netgate.net/cpqarmadaem.html

It looks like one for a docking station.

Looks like a tongle or scsi to me... May I ask what model is your compaq....

regards

ethernet card port