I have a very simple setup. A Verizon Fios Actiontec MI424WR going to my Realtek RTL8168C(P)/8111C(P) Family PCI-E Gigabit Ethernet NIC. For some reason my speed is shown as 100.0 Mbps. Why doesn't it show 1.0 Gbps? The cable?
Quoting directly from The Manual (for the latest MI424WR Verizon is shipping):
LAN Ethernet Ports (4)
The LAN Ethernet ports connect devices to the FiOS Router via Ethernet cables to create a local area network (LAN). The LAN Ethernet ports are 10/100 Mbps auto-sensing ports, and either a straight-through or crossover Ethernet cable can be used when connecting devices to the ports.
The LAN ports are NOT gigabit - they are 10/100.