User's Manual

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5.17 What is 802.1x Authentication?
802.1x is a framework for authenticated MAC-level access control, defines Extensible Authentication
Protocol (EAP) over LANs (WAPOL). The standard encapsulates and leverages much of EAP, which
was defined for dial-up authentication with Point-to-Point Protocol in RFC 2284.
Beyond encapsulating EAP packets, the 802.1x standard also defines EAPOL messages that
convey the shared key information critical for wireless security.
5.18 What is Temporal Key Integrity Protocol (TKIP)?
The Temporal Key Integrity Protocol, pronounced tee-kip, is part of the IEEE 802.11i encryption
standard for wireless LANs. TKIP is the next generation of WEP, the Wired Equivalency Protocol,
which is used to secure 802.11 wireless LANs. TKIP provides per-packet key mixing, a message
integrity check and a re-keying mechanism, thus fixing the flaws of WEP.
5.19 What is Advanced Encryption Standard (AES)?
Security issues are a major concern for wireless LANs, AES is the U.S. government’s next-
generation cryptography algorithm, which will replace DES and 3DES.
5.20 What is Inter-Access Point Protocol (IAPP)?
The IEEE 802.11f Inter-Access Point Protocol (IAPP) supports Access Point Vendor interoperability,
enabling roaming of 802.11 Stations within IP subnet.
IAPP defines messages and data to be exchanged between Access Points and between the IAPP
and high layer management entities to support roaming. The IAPP protocol uses TCP for inter-
Access Point communication and UDP for RADIUS request/response exchanges. It also uses Layer
2 frames to update the forwarding tables of Layer 2 devices.
5.21 What is Wireless Distribution System (WDS)?
The Wireless Distribution System feature allows WLAN AP to talk directly to other APs via wireless
channel, like the wireless bridge or repeater service.
5.22 What is Universal Plug and Play (uPNP)?
UPnP is an open networking architecture that consists of services, devices, and control points. The
ultimate goal is to allow data communication among all UPnP devices regardless of media, operating
system, programming language, and wired/wireless connection.
5.23 What is Maximum Transmission Unit (MTU) Size?
Maximum Transmission Unit (MTU) indicates the network stack of any packet is larger than this
value will be fragmented before the transmission. During the PPP negotiation, the peer of the PPP
connection will indicate its MRU and will be accepted. The actual MTU of the PPP connection will be
set to the smaller one of MTU and the peer’s MRU. The default is value 1400.