Chapter 7 Introduction to TCP/IP

THE FOLLOWING COMPTIA A+ 220–901 EXAM OBJECTIVES ARE COVERED IN THIS CHAPTER:

  • ✓ 2.3 Explain properties and characteristics of TCP/IP.
    • IPv4 vs. IPv6
    • Public vs. private vs. APIPA/link local
    • Static vs. dynamic
    • Client-side DNS settings
    • Client-side DHCP
    • Subnet mask vs. CIDR
    • Gateway
  • ✓ 2.4 Explain common TCP and UDP ports, protocols, and their purpose.
    • Ports
      • 21—FTP
      • 22—SSH
      • 23—Telnet
      • 25—SMTP
      • 53—DNS
      • 80—HTTP
      • 110—POP3
      • 143—IMAP
      • 443—HTTPS
      • 3389—RDP
      • 137–139, 445—SMB
      • 548 or 427—AFP
    • Protocols
      • DHCP
      • DNS
      • LDAP
      • SNMP
      • SMB
      • CIFS
      • SSH
      • AFP
    • 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 ...

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