The ASUS RT-AX86U Pro router has a single 2.5 Gigabit port that can be used for either inbound or outbound, but not both at the same time. This means that when connected to a high-speed Internet service, you can achieve 2.5 Gigabit speeds for either inbound or outbound traffic, but not both at the same time.

Yes, although it should be noted that, as far as I know, there is no network card that can process 2.5 GB. So this is about the maximum throughput or the cumulative performance of different end devices. The router can handle this.