Fujitsu B6220 User Manual download pdf (Page 109)

101

WIreless LAN User’s Guide

Shared key authentication

802.11 network authentication method in which the AP

sends the client device a challenge text packet that the

client must then encrypt with the correct WEP key and

return to the AP. If the client has the wrong key or no

key, authentication will fail and the client will not be

allowed to associate with the AP. Shared key authentica-

tion is not considered secure, because a hacker who

detects both the clear-text challenge and the same chal-

lenge encrypted with a WEP key can decipher the WEP

key.

SSID (Service Set Identifier)

Service Set Identifier, a 32-character unique identifier

attached to the header of packets sent over a WLAN that

acts as a password when a mobile device tries to connect

to the BSS. The SSID differentiates one WLAN from

another, so all access points and all devices attempting to

connect to a specific WLAN must use the same SSID. A

device will not be permitted to join the BSS unless it can

provide the unique SSID. Because the SSID is broadcast

in plain text, it does not supply any security to the

network.

Subnet mask

TCP-IP network is controlled by being divided into

multiple smaller networks (subnets). IP address consists

of the subnet address and the address of each computer.

Subnet mask defines how many bits of IP address

comprise the subnet address. The same value shall be set

among computers communicating with each other.

TCP/IP (Transmission Control Protocol/Internet

Protocol)

A standard protocol of the Internet.

Wi-Fi

Wi-Fi, or Wireless Fidelity, is a set of standards for wire-

less local area networks (WLAN) based on the IEEE

802.11 specifications. Certified products can use the offi-

cial Wi-Fi logo, which indicates that the product is

interoperable with any other product also showing that

logo.

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Fujitsu B6220 User Manual Page 109