Extreme Networks Summit WM User Manual page 321

Term
TSN
Tunnelling
UDP
U-NII
URL
VLAN
VoIP
VPN
Summit WM User Guide, Software Version 5.3
Explanation
Transition Security Network. A subset of Robust Security Network (RSN),
which provides an enhanced security solution for legacy hardware. The
Wi-Fi Alliance has adopted a solution called Wireless Protected Access
(WPA), based on TSN. RSN and TSN both specify IEEE 802.1X
authentication with Extensible Authentication Protocol (EAP).
Tunnelling (or encapsulation) is a technology that enables one network to
send its data via another network's connections. Tunnelling works by
encapsulating packets of a network protocol within packets carried by the
second network. The receiving device then decapsulates the packets and
forwards them in their original format.
User Datagram Protocol. A connectionless protocol that, like TCP, runs on
top of IP networks. Unlike TCP/IP, UDP/IP provides very few error
recovery services, offering instead a direct way to send and receive packets
over an IP network. It is used primarily for broadcasting messages over a
network.
Unlicensed National Information Infrastructure. Designated to provide
short-range, high-speed wireless networking communication at low cost, U-
NII consists of three frequency bands of 100 MHz each in the 5 GHz band:
5.15-5.25GHz (for indoor use only), 5.25-5.35 GHz and 5.725-5.825GHz. The
three frequency bands were set aside by the FCC in 1997 initially to help
schools connect to the Internet without the need for hard wiring. U-NII
devices do not require licensing.
Uniform Resource Locator. the unique global address of resources or files
on the World Wide Web. The URL contains the name of the protocol to be
used to access the file resource, the IP address or the domain name of the
computer where the resource is located, and a pathname -- a hierarchical
description that specifies the location of a file in that computer.
Virtual Local Area Network. A network of computers that behave as if they
are connected to the same wire when they may be physically located on
different segments of a LAN. VLANs are configured through software
rather than hardware, which makes them extremely flexible. When a
computer is physically moved to another location, it can stay on the same
VLAN without any hardware reconfiguration.
The standard is defined in IEEE 802.1Q - Virtual LANs, which states that
"IEEE 802 Local Area Networks (LANs) of all types may be connected
together with Media Access Control (MAC) Bridges, as specified in ISO/
IEC 15802-3. This standard defines the operation of Virtual LAN (VLAN)
Bridges that permit the definition, operation and administration of Virtual
LAN topologies within a Bridged LAN infrastructure."
Voice Over Internet Protocol. An internet telephony technique. With VoIP,
a voice transmission is cut into multiple packets, takes the most efficient
path along the Internet and is reassembled when it reaches the destination.
Virtual Private Network. A private network that is constructed by using
public wires to connect nodes. These systems use encryption and other
security mechanisms to ensure that only authorized users can access the
network and that the data cannot be intercepted.
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