Terms you'll need to understand:
Firewall
Internet Connection Firewall (ICF)
Domain Name System
NetBIOS
TCP/IP
ping
tracert
ipconfig
Modem
Network interface card
Techniques you'll need to master:
Identify and troubleshoot network connectivity problems
Troubleshoot hardware problems
Use ping and tracert to troubleshoot network connectivity problems
Use ipconfig to resolve IP addressing issues
Identify and resolve issues related to routing and remote access
Troubleshoot name resolution problems
Understand Internet Connection Firewall
Troubleshoot problems related to ICF