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Terms you'll need to understand:
Transmission Control Protocol/Internet Protocol (TCP/IP)
Dynamic Host Configuration Protocol (DHCP)
Domain Name System (DNS)
Windows Internet Naming Service (WINS)
Automatic Private IP Addressing (APIPA)
File Transfer Protocol (FTP)
Simple Mail Transfer Protocol (SMTP)
Address Resolution Protocol (ARP)
ipconfig
ping
route
tracert
TCP/IP profiles
Remote Desktop
Remote Assistance
Nbtstat
Loopback address
Variable length subnet mask