Tested with ManAtWork's included MAC/PHY driver for the LAN8720A. It should be possible to make it work with any other MAC/PHY.
- Echos Ethernet frames received from ManAtWork's driver
- Ethernet frames
- ARP
- IPv4
- IPv6
- ICMPv4
- ICMPv6
- Hosts table
- Associates IP addresses, MAC addresses, and hostnames
- UDP
- DHCP client
- DNS resolver
- mDNS
- TCP
- Scary...