Title: Explain common ports, protocols, and their purpose.
Course: Cybersecurity Systems Technology (10109-III) > Section: Exploring Networking

Explanation should include

- ports
  - 21 – File Transfer Protocol (FTP)
  - 22 – Secure Shell (SSH)
  - 23 – telecommunications network (TELNET)
  - 25 – Simple Mail Transfer Protocol (SMTP)
  - 53 – DNS
  - 80 – Hypertext Transfer Protocol (HTTP)
  - 110 – Post Office Protocol 3 (POP3)
  - 143 – Internet Mail Access Protocol (IMAP)
  - 443 – Hypertext Transfer Protocol over Secure Sockets Layer (HTTPS)
  - 3389 – Remote Desktop Protocol (RDP)
  - 137-139 – NetBIOS/NetBIOS over TCP/IP (NetBT)
  - 445 – Server Message Block/Common Internet File System (SMB/CIFS)
  - 427 – Service Location Protocol (SLP)
  - 548 – AppleTalk Filing Protocol (AFP)

- protocols
  - DHCP
  - DNS
  - Lightweight Directory Access Protocol (LDAP)
  - SNMP
  - SMB
  - CIFS
  - SSH
  - AFP

- TCP vs. UDP.

Process/Skill Questions:

- What is the major advantage of using port 443 rather than port 80 for web browsing?
- What are the commonly used port numbers for email and their purposes?
- What are the similarities and differences between TCP and UDP?
- What is the benefit of SSH compared to FTP?