Finished:
- Subnetting - https://github.com/blurer/ICND2-Notes/blob/master/subnetting.md
- Serial, line protocol down - https://github.com/blurer/ICND2-Notes/blob/master/serial-line-protocol-down.md
To do:
- LAN Switching Technologies
- Routing Technologies
- WAN Technologies
- Infrastructure Services
- Infrastructure Maintenance