DATA COMMUNICATION - PROTOCOLS

• Components:

  • message
  • receiver
  • sender
  • transmission medium / communication
  • protocol
• a.) Transmission Control Protocol / Internet Protocol (TCP/IP) - foundational protocol suite of the internet.
• b.) User Datagram Protocol - sending data without reliability or security, but with speed and efficiency. (checksums and port)
• c.) Hypertext Transfer Protocol (HTTP) and HTTPS - ability for transmitting web pages.

  HTTP is unsecured, while HTTPS is secured with SSL or TLS, Encryption, and PKI.
• d.) Simple Mail Text Protocol - ability for sending or receiving mails
• e.) File Transfer Protocol - transfers files between two computers
• f.) Dynamic Host Configuration Protocol - assigns IP addresses
• g.) Address Resolution Protocol - convert an IP address to its corresponding physical address.
• h.) Reverse Address Resolution Protocol - map a physical MAC address to an IP address
• i.) Domain Name System - translates human-friendly domain names