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3.3.3. Wireless Security and Authentication
Security Protocols Evolution:
- WEP: Broken, never use (static keys, weak encryption)
- WPA: Improved but deprecated (TKIP encryption)
- WPA2: Current standard (AES encryption)
- WPA3: Latest standard (SAE authentication, stronger encryption)
Authentication Modes:
| Mode | How It Works | Use Case |
|---|---|---|
| WPA2-Personal (PSK) | Shared password | Home, small office |
| WPA2-Enterprise | Individual credentials via RADIUS/802.1X | Corporate environments |
| Open | No authentication | Guest networks (with captive portal) |
WPA2-Enterprise with 802.1X:
EAP (Extensible Authentication Protocol): Framework for various authentication methods:
- EAP-TLS: Client and server certificates (most secure)
- PEAP: Server certificate, client credentials
- EAP-FAST: Cisco, uses Protected Access Credential (PAC)
Captive Portal: Redirects clients to authentication webpage before granting network access. Common for guest networks, hotels, airports.
Written byAlvin Varughese
Founder•15 professional certifications