Part III — Secure Network Clients

Chapter 6

TCP/IP Fundamentals and IP Addressing

Domain 3 Lab 4

📖 Key Topics Covered

  • ▸ TCP/IP Fundamentals and IP
  • ▸ Understanding the TCP/IP Model
  • ▸ TCP/IP Layers
  • ▸ KEY PROTOCOLS
  • ▸ SECURITY CONCERNS
  • ▸ User‐facing services and
  • ▸ SMTP, SSH, FTP
  • ▸ TCP, UDP
  • ▸ SYN floods, session
  • ▸ Logical addressing and
  • ▸ IP, ICMP, ARP
  • ▸ ICMP attacks
  • ▸ Physical transmission of
  • ▸ Ethernet, Wi‐Fi
  • ▸ Eavesdropping, MAC

🔑 Key Terms

Acknowledge DHCP (Dynamic Host Configuration Protocol) DNS (Domain Name System) DNS (IP to hostname) Discover FTP (File Transfer SFTP (port 22) FTPS (port 990) HTTP (unencrypted HTTPS (port 443) HTTPS (encrypted Already secure web) IMAP (Email retrieval) IMAPS (port 993) Offer RDP (Remote Desktop) Request SMTP (Email sending) SSH (Secure Shell) SSH (port 22)

See the full definitions in the Glossary and test yourself with Flashcards.

Assessment Tips

💡 Assessment Tip

Memorize the common ports table above. The exam will test your ability to identify services by port number and determine which protocols are secure vs. insecure. Remember: Telnet (23), FTP (21), and HTTP (80) are insecure—always use their encrypted a

🧪 Hands-On Lab

This chapter includes Lab 4 in Appendix E. View lab setup guide →

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