TCP/IP -- A communications protocol by which all devices on the Internet are connected.

• TCP -- Transmission Control Protocol
• IP -- Internet Protocol

URL -- Uniform Resource Locator

• Absolute vs. Relative URLs

IP Address

• Every device on Internet has one.
• The form of an IP address is 1.1.1.1

Domain Name System (DNS)

• InterNic -- registers domain names

Server Operating Systems

• UNIX has been the most popular -- Shrike runs the UNIX operating system.
• Windows NT is becoming more popular.
• Linux is making a run at it.

Server Software
Some of the most popular server software packages are:

• NCSA (runs under UNIX)
• Apache (UNIX, NT coming soon)
• CERN (UNIX)
• Netscape (UNIX or NT)
• Internet Information Server (NT)

Permissions

• Levels of security
  • User
  • Group
  • Other
• Permits you to access files in a particular way
  • Read
  • Write
  • Execute