Networking and Protocol Security

Lessons

1. 1

   Networking for Security: Why Protocols Are the Battleground

   Free

   Understand why networking is the foundation of security and the rule that every technique here is only legal against systems you own or are authorized to test.

   Beginner·20 min
2. 2

   How Computers Talk: The Networking Foundation

   Explain the OSI and TCP/IP models, IP addressing and CIDR, NAT, MAC/ARP, and how DNS resolves end to end.

   Beginner·50 min
3. 3

   TCP vs UDP: The Protocol Difference

   Explain the TCP handshake and teardown, how UDP differs, the security implications, and capture a handshake in Wireshark.

   Beginner·45 min
4. 4

   Wireshark: Reading Network Traffic

   Capture and analyze traffic, follow a TCP stream, and extract credentials from plaintext HTTP to prove why HTTPS is required.

   Intermediate·50 min
5. 5

   ARP Spoofing and Poisoning

   Explain why ARP is insecure, how poisoning reroutes traffic, what it enables, the defenses, and demonstrate it in an isolated lab.

   Intermediate·50 min
6. 6

   Man-in-the-Middle Attacks

   Explain MITM vectors and tools (Bettercap, mitmproxy), SSL stripping and why HSTS defeats it, and certificate pinning.

   Intermediate·45 min
7. 7

   SYN Floods and DDoS Attacks

   Explain SYN floods and SYN cookies, the DDoS taxonomy including Slowloris, amplification, and modern defenses.

   Intermediate·45 min
8. 8

   DNS Attacks and Defenses

   Explain DNS spoofing, hijacking, tunneling, and rebinding, and the defenses (DNSSEC, DoH, registrar MFA, monitoring).

   Intermediate·45 min
9. 9

   Wireless Network Attacks

   Explain 802.11, WEP/WPA2/WPA3, evil twin and deauth attacks, and capture/crack a WPA2 handshake on a network you own.

   Intermediate·50 min
10. 10

    Network Security Job Readiness

    Translate network-security skills into job titles, a resume, interview answers, certifications, and a portfolio checklist.

    Intermediate·35 min