Cisco Linksys WAP4410N, User Manual

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WAP4410N User Guide 45
Frequently Asked Questions
• Dual IPv4/IPv6 stack - simultaneous access from IPv4 and IPv6 client at the same time.
The device supports the following IPv6 Applications:
• WEB/SSL
• SNTP
• PING6
• TRACE Route
What is Ad-hoc?
An Ad-hoc wireless LAN is a group of computers, each with a WLAN adapter, connected as an
independent wireless LAN. An Ad-hoc wireless LAN is applicable at a departmental scale for a
branch or SOHO operation.
What is Infrastructure?
An integrated wireless and wired LAN is called an Infrastructure configuration. Infrastructure is
applicable to enterprise scale for wireless access to a central database, or wireless application
for mobile workers.
What is roaming?
Roaming is the ability of a portable computer user to communicate continuously while moving
freely throughout an area greater than that covered by a single Access Point. Before using the
roaming function, the workstation must make sure that it is set to the same channel number as
the Access Point of the dedicated coverage area.
To achieve true seamless connectivity, the wireless LAN must incorporate a number of different
functions. Each node and Access Point, for example, must always acknowledge receipt of each
message. Each node must maintain contact with the wireless network even when not actually
transmitting data. Achieving these functions simultaneously requires a dynamic RF networking
technology that links Access Points and nodes. In such a system, the user’s end node
undertakes a search for the best possible access to the system. First, it evaluates such factors as
signal strength and quality, as well as the message load currently being carried by each Access
Point and the distance of each Access Point to the wired backbone. Based on that information,
the node next selects the right Access Point and registers its address. Communications
between end node and host computer can then be transmitted up and down the backbone.
As the user moves on, the end node’s RF transmitter regularly checks the system to determine
whether it is in touch with the original Access Point or whether it should seek a new one. When
a node no longer receives acknowledgment from its original Access Point, it undertakes a new
search. Upon finding a new Access Point, it then re-registers, and the communication process
continues.
What is the ISM band?
The FCC and their counterparts outside of the U.S. have set aside bandwidth for unlicensed use
in the ISM (Industrial, Scientific and Medical) band. Spectrum in the vicinity of 2.4 GHz, in