🛰️ WiFi
Wireless Fidelity#
- Uses radio waves
- Uses frequencies 2.4Ghz and 5Ghz
- 802.11 Standards:
└── 11a, 11b, 11g, 11n and 11ac
- Security, interference and range issues
Range and interference#
- 50 meters indoors
- 90 meters outdoors
- Cordless phones, microwaves, baby monitors can interfere.
Wi-Fi Security#
- WiFi signal should be encrypted
- WPA/WPA2/WPA3
- Older WEP encryption is now considered unfafe
- Devices can be blocked via MAC
Mac and IP#
MAC#
Media Access Control
- A unique identifier assigned to a network interface controller for use as a network address in communications within a network segment. 12 digit hexadecimal number. Hex base 16.
IP#
Internet Protocol
- A numerical label such as 192.0.2.1 that is connected to a computer network that uses the Internet Protocol for communication. V4 or V6.
- Logical Address. Can and will be changed per connection. Static or dynamic
- Issued by server, router or other network device. V6 will replace V4 as it provides many more addresses than V4