What is Uplink port?
The Uplink port is the physical connection between the server and the Internet. These ports allow a network to communicate with outside networks. The uplink port on a router is used to expand the network. Routers can use the uplink port to connect to other routers, switches, and hubs to increase the maximum number of wired devices connected to the network. The uplink port has grown less relevant with the introduction of Wi-Fi, but can still be useful if the network contains more wired devices than a single router can handle. A router port might be switch-activated to toggle between Ethernet and uplink functionality.
Uplink ports can be used for connecting a broadband modem to a home router for Internet access and connecting one uplink device (router, switch, hub) to another.
Uplink ports cannot be connected between two uplink ports with one another. It is also cannot be connected to a computer and a uplink port.
The speed of a Uplink port:
An uplink port is set to connect one piece of networking equipment to another (as opposed to a server or client computer). 10Mbps is about ten times slower than 100 Mbps. Mbps is MegaBits Per Second, so every eight seconds the equivalent MegaByte is transferred.
For dedicated servers, the uplink port speed is most likely the speed of the connection between the server and the router to the backbone. So a 100Mbps link will be able to send out data at ten times the rate of a 10Mbps link. If you are serving a lot of large files then 1000Mbps can be used. This could be best for the dedicated servers that are used for high traffic hosting of websites and applications.