4-way handshake:
In the realm of Wi-Fi security, the 4-way handshake is a cryptographic process involving four messages exchanged between a device seeking to connect to a Wi-Fi network and the network itself. This intricate dance ensures a secure initiation of the connection, safeguarding against unauthorized access.
CSMA/CA:
Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) is a protocol that regulates how devices access the shared wireless channel. Unlike wired networks, Wi-Fi needs to contend with potential interference, and CSMA/CA minimizes collisions by having devices listen for ongoing transmissions before attempting to transmit their own data.
Half-duplex:
In wireless communication, the term “half-duplex” describes a mode where devices can either send or receive data, but not both simultaneously. This communication style is akin to a walkie-talkie, where one party talks while the other listens, then they switch roles.
Frame:
Think of a frame as the fundamental building block of Wi-Fi communication. It’s a structured unit of data containing essential information such as source and destination addresses, control information, and the actual payload. Frames ensure orderly and efficient data transmission within a network.
802.11:
The 802.11 family of standards forms the backbone of wireless networking, commonly referred to as Wi-Fi. These standards, denoted by letters like ‘a,’ ‘b,’ ‘g,’ ‘n,’ and so on including the latest “ax”, define the rules for wireless communication, covering aspects like data rates, frequency bands, and security protocols. The ubiquitous nature of 802.11 has revolutionized how we connect in the digital age.
Co-channel interference:
Co-channel interference occurs when multiple devices share the same frequency or channel in a wireless network. This phenomenon can lead to signal degradation and reduced performance as devices contend for the limited bandwidth. Mitigating co-channel interference is crucial for maintaining a stable and efficient Wi-Fi environment.
Adjacent channel interference:
Adjacent channel interference arises when signals from one channel overlap into adjacent channels. In Wi-Fi, this can occur when channels are not spaced far enough apart, causing interference and degradation in performance. Proper channel planning and allocation are essential to minimize adjacent channel interference and optimize overall network reliability.
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