User's Manual

hwc_glossary.fm
Glossary
Networking terms and abbreviations
A31003-W1050-U100-2-7619,
March 2008
HiPath Wireless Controller, Access Points and Convergence Software V5 R1 , C20/C2400 User Guide 365
SSL Secure Sockets Layer. A protocol developed by Netscape for transmitting private documents
via the Internet. SSL works by using a public key to encrypt data that's transferred over the
SSL connection. URLs that require an SSL connection start with https: instead of http.
SSL uses a program layer located between the Internet's Hypertext Transfer Protocol (HTTP)
and Transport Control Protocol (TCP) layers. The "sockets" part of the term refers to the
sockets method of passing data back and forth between a client and a server program in a
network or between program layers in the same computer. SSL uses the public-and-private
key encryption system from RSA, which also includes the use of a digital certificate.
SSL has recently been succeeded by Transport Layer Security (TLS), which is based on SSL.
Subnet mask (See netmask)
Subnets Portions of networks that share the same common address format. A subnet in a TCP/IP
network uses the same first three sets of numbers (such as 198.63.45.xxx), leaving the fourth
set to identify devices on the subnet. A subnet can be used to increase the bandwidth on the
network by breaking the network up into segments.
SVP SpectraLink Voice Protocol, a protocol developed by SpectraLink to be implemented on
access points in order to facilitate voice prioritization over an 802.11 wireless LAN that will
carry voice packets from SpectraLink wireless telephones.
Switch In networks, a device that filters and forwards packets between LAN segments. Switches
operate at the data link layer (layer 2) and sometimes the network layer (layer 3) of the OSI
Reference Model and therefore support any packet protocol. LANs that use switches to join
segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet
LANs.
syslog A protocol used for the transmission of event notification messages across networks,
originally developed on the University of California Berkeley Software Distribution (BSD) TCP/
IP system implementations, and now embedded in many other operating systems and
networked devices. A device generates a messages, a relay receives and forwards the
messages, and a collector (a syslog server) receives the messages without relaying them.
Syslog uses the user datagram protocol (UDP) as its underlying transport layer mechanism.
The UDP port that has been assigned to syslog is 514. (RFC3164)
TCP / IP Transmission Control Protocol. TCP, together with IP (Internet Protocol), is the basic
communication language or protocol of the Internet. Transmission Control Protocol manages
the assembling of a message or file into smaller packets that are transmitted over the Internet
and received by a TCP layer that reassembles the packets into the original message. Internet
Protocol handles the address part of each packet so that it gets to the right destination.
TCP/IP uses the client/server model of communication in which a computer user (a client)
requests and is provided a service (such as sending a Web page) by another computer (a
server) in the network.
TFTP Trivial File Transfer Protocol. An Internet software utility for transferring files that is simpler to
use than the File Transfer Protocol (FTP) but less capable. It is used where user
authentication and directory visibility are not required. TFTP uses the User Datagram Protocol
(UDP) rather than the Transmission Control Protocol (TCP). TFTP is described formally in
Request for Comments (RFC) 1350.
TKIP Temporal Key Integrity Protocol (TKIP) is an enhancement to the WEP encryption technique
that uses a set of algorithms that rotates the session keys. TKIPs’ enhanced encryption
includes a per-packet key mixing function, a message integrity check (MIC), an extended
initialization vector (IV) with sequencing rules, and a re-keying mechanism. The encryption
keys are changed (rekeyed) automatically and authenticated between devices after the rekey
interval (either a specified period of time, or after a specified number of packets has been
transmitted).
Term Explanation
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