Introduction to Ports

• Ports are like windows and doors on a computer
  • They can be open or closed
• The computer is compared to a house
  • Walls protect the inside
  • Ports give ways to enter and exit

Ports and Their Functions

• Each port has:
  • A specific number
    • Ex:
    • 22
    • 80
    • 443
    • 21
  • Each port also has the specific responsibility
• Examples of port functions
  • Port 22: SSH
  • Port 80: HTTP