Asus GX-D1051 V2
With more LAN ports you are able to connect more computers to the network directly using LAN cables.
Asus GX1008B V4
A WAN (Wider Area Network) port is most commonly used to connect the router to the Internet. It can also be used to connect to an external private network.
With more USB ports, you are able to connect more devices.
A higher maximum Wi-Fi speed results in better performance. This is measured in megabytes per second.
Asus GX1008B V5
Apple Airport Time Capsule
More antennas result in increased signal strength. External antennas can be repositioned in order to improve the signal, and replaced with a longer antenna if needed.
A network firewall protects a computer network from unauthorized access.
This is a security feature in which network access is granted to devices based on their unique MAC address. It can provide increased security, but it can be a risk if the user loses the device.