AirData 54 Plus S2 USB

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AirData 54 Plus S2 USB User Manual ISM Band: Industrial, Scientific and Medical Band is the 2.4 – 2.483 GHz frequency band. LED: Light Emitting Diode, an electronic device that lights up when electricity is passed through it. MAC Address: Media Access Control Address is a unique HEX number assigned by the manufacturer to any Ethernet networking device. Node: A network junction or connection point, typically an Access Point / Router. OFDM: Orthogonal Frequency Division Multiplexing is a modulation scheme that works by dividing the communication channel into a number of sub-channels that are spaced apart at precise frequencies. This spacing provides the “orthogonality” in this technique which allows the transmitter and the receiver to communicate using a “dedicated” sub-channel. The benefits of OFDM are high spectral efficiency and resiliency to interference. Open Authentication: Open System authentication is a null authentication algorithm. Any station that requests authentication receives it. If the key that the station is using is not correct, then further communication is not possible Packet: A set of data routed between an origin and a destination in a network. Preamble Type: A preamble is a signal used in network communications to synchronize the transmission timing between two or more systems. RADIUS: Remote Authentication Dial-In User Service is an authentication and accounting system used by many Internet Service Providers (ISPs). When you dial in to the ISP you must enter your username and password. This information is passed to a RADIUS server, which checks that the information is correct, and then authorizes access to the ISP system. RTS: Request To Send is a signal sent from the transmitting station to the receiving station requesting permission to transmit. Shared Key Authentication: When Shared Key authentication is enabled, the Access Point / Router sends a packet to the client. The client uses a secret key in order to encode the packet and retransmits the encoded information back to the Access Point / Router. If the packet is correctly encoded then the client is authenticated. 75
AirData 54 Plus S2 USB User Manual SSID: Service Set Identifier is a unique name shared among all clients and nodes in a wireless network. The SSID must be identical for all clients and nodes within a wireless network. Subnet Mask: The method used for splitting IP networks into a series of sub-groups, or subnets. TKIP: Temporal Key Integrity Protocol. The TKIP works with a RADIUS server and changes the network keys every 10.000 packets, ensuring greater security. TLS: Transport Layer Security is a protocol that guarantees privacy and data integrity between client / server applications communicating over the Internet. It is application protocolindependent, allowing higher-level protocols to be setup on top of it transparently. Throughput: The amount of data transferred from one place to another or processed in a specified amount of time. WEP: Wired Equivalent Privacy is an encryption scheme that is used in wireless data communication and prevents stations that do not have the correct WEP key from linking to an Access Point / Router. WPA: Wi-Fi Protected Access is a standard designed to improve the WEP security feature on WLANs. It incorporates TKIP and EAP. WPA-PSK: Wi-Fi Protected Access Pre Shared Key is a variation of the WPA standard that is designed for small office – home use. It incorporates a Pre Shared Key, called passphrase to prevent unwanted stations from linking to an Access Point / Router. AES : AES (Advanced Encryption Standard), a chip-based security, has been developed to ensure the highest degree of security and authenticity for digital information, wherever and however communicated or stored, while making more efficient use of hardware and/or software than previous encryption standards. It is also included in IEEE 802.11i standard. Compare with AES, TKIP is a temporary protocol for replacing WEP security until manufacturers implement AES at the hardware level. 76
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