About Wireless LAN

Wi-Fi®

Wi-Fi Certification assures tested and proven interoperability by the Wi-Fi Alliance, a group certifying interoperability among wireless LAN devices.

IEEE 802.11b

This is one wireless LAN standard set by the 802 working group that establishes LAN technology standards at the IEEE (Institute of Electrical and Electronics Engineers) of the United States. It uses the

2.4GHz band usable freely without a radio frequency license (ISM band), enabling communications at a maximum speed of 11 Mbps.

The value indicated above is the maximum theoretical value for the wireless LAN standard, and does not indicate the actual data transfer rate.

IEEE 802.11g

This is another wireless LAN standard set by the 802 working group that establishes LAN technology standards at the IEEE (Institute of Electrical and Electronics Engineers) of the United States, and is compatible with IEEE 802.11b. It also uses the 2.4 GHz band, but enables communications at a maximum speed of 54 Mbps.

The value indicated above is the maximum theoretical value for the wireless LAN standard, and does not indicate the actual data transfer rate.

Infrastructure Communications

“Infrastructure Communications” refers to networks using wireless LAN access points.

This function can be used to connect to the Internet or a wired LAN via a wireless LAN access point. Wireless LAN access points include wireless broadband routers.

Ad-hoc Communications

Signal transfer through wireless interconnection of computers is referred to as “ad hoc communications”. With such ad hoc communications there is no connection to the Internet. Ad hoc communications are suited for establishing simple temporary networks.

Network Names

(SSID: Security Set Identifier)

When forming wireless LAN networks, groups are formed to prevent interference, data theft, etc. This grouping is done by “SSID” or “Security Set Identifiers”. For further security, a WEP key is set and signal transfer is not possible unless the SSID and WEP key match.

WEP Key (Network Key)

This is key information used for encrypting data when conducting data transfer. On the AVR-4308, the same WEP key is used for data encryption and decryption, so the same WEP key must be set on both devices in order for communications to be established between them.

ENGLISH

WPA (Wi-Fi Protected Access)

 

 

Getting

 

This is a security standard established by the Wi-Fi

 

Alliance. In addition to the conventional SSID (network

 

name) and WEP key (network key), it also uses a user

 

Started

identification function and encrypting protocol for

 

stronger security.

 

encryption.

 

Connections

WPA2 (Wi-Fi Protected Access 2)

 

 

This is a new version of the WPA established by the

 

 

Wi-Fi Alliance, compatible with more secure AES

 

 

WPA-PSK/WPA2-PSK (Pre-shared Key)

 

 

Setup

This is a simple authentication system for mutual

 

 

 

authentication when a preset character string matches

 

 

on the wireless LAN access point and client.

 

Playback

Passphrase

 

 

 

 

This refers to the code key used for WPA-PSK/WPA2-

 

 

PSK authentication, a WPA authentication method.

 

Information

TKIP (Temporal Key Integrity Protocol)

 

 

 

 

This is a network key used for WPA. The encryption

 

 

algorithm is RC4, the same as for WEP, but the security

 

 

 

Troubleshooting

level is increased by changing the network key used

 

for encryption for each packet.

 

 

 

AES (Advanced Encryption Standard)

 

 

 

This is a next generation standard encryption method

 

 

replacing the current DES and 3DES, and because of

 

 

its high security it is expected to be applied widely

 

 

to wireless LANs in the future. It uses the “Rijndael”

 

 

algorithm developed by two Belgian cryptographers to

 

 

divide the data into blocks of fixed lengths and encrypt

 

 

each block. It supports data lengths of 128, 192 and

 

 

256 bits and key lengths of 128, 192 and 256 bits as

 

 

well, offering extremely high encryption security.

 

 

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