Chapter 7

Introduction to TCP/IP

The following CompTIA A+ 220-801 Exam objectives are covered in this chapter:

  • 2.3 Explain properties and characteristics of TCP/IP.
    • IP class
    • Class A
    • Class B
    • Class C
    • IPv4 vs. IPv6
    • Public vs. private vs. APIPA
    • Static vs. dynamic
    • Client-side DNS
    • DHCP
    • Subnet mask
    • Gateway
  • 2.4 Explain common TCP and UDP ports, protocols, and their purpose.
    • Ports
    • 21 - FTP
    • 23 - Telnet
    • 25 - SMTP
    • 53 - DNS
    • 80 - HTTP
    • 110 - POP3
    • 143 - IMAP
    • 443 - HTTPS
    • 3389 - RDP
    • Protocols
    • DHCP
    • DNS
    • LDAP
    • SNMP
    • SMB
    • SSH
    • SFTP
    • TCP vs. UDP

Networking protocols are a lot like human languages in that they are the language that computers speak when talking to each other. If computers don’t speak the same language, they won’t be able to talk. To complicate matters, ...

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