Honeywell XYR301E, Руководство пользователя

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XYR301E Wireless Ethernet Appendix B
Page 96 April 2012
Encryption key An alphanumeric (letters and/or numbers) series that enables data to be encrypted and then decrypted
so it can be safely shared among members of a network. WEP uses an encryption key that
automatically encrypts outgoing wireless data. On the receiving side, the same encryption key
enables the computer to automatically decrypt the information so it can be read. Encryption keys
should be kept secret
Firewall
A device or computer program that keeps unauthorized users out of a private network. Everything
entering or leaving a system's internal network passes through the firewall and must meet the
system's security standards in order to be transmitted. Often used to keep unauthorized people from
using systems connected to the Internet.
Hub
A multiport device used to connect PCs to a network via Ethernet cabling or via 802.11. Wired hubs
can have numerous ports and can transmit data at speeds ranging from 10 Mbps to multi-Gigabyte
speeds per second. A hub transmits packets it receives to all the connected ports. A small wired hub
may only connect 4 computers; a large hub can connect 48 or more.
Hz Hertz. The international unit for measuring frequency, equivalent to the older unit of cycles per
second. One megahertz (MHz) is one million hertz. One gigahertz (GHz) is one billion hertz. The
standard US electrical power frequency is 60 Hz, the AM broadcast radio frequency band is 535—
1605 kHz, the FM broadcast radio frequency band is 88—108 MHz, and wireless 802.11b/g LANs
operate at 2.4 GHz.
IEEE Institute of Electrical and Electronics Engineers, New York, www.ieee.org. A membership
organization that includes engineers, scientists and students in electronics and allied fields. It has
more than 300,000 members and is involved with setting standards for computers and
communications.
Infrastructure
mode An 802.11 setting providing connectivity to an AP. As compared to Ad-Hoc mode, whereby 802.11
devices communicate directly with each other, clients set in Infrastructure Mode all pass data through
a central AP. The AP not only mediates wireless network traffic in the immediate neighbourhood, but
also provides communication with the wired network. See Ad-Hoc and AP.
I/O Input / Output. The term used to describe any operation, program or device that transfers data to or
from a computer.
Internet appliance
A computer that is intended primarily for Internet access is simple to set up and usually does not
support installation of third-party software. These computers generally offer customized web
browsing, touch-screen navigation, e-mail services, entertainment and personal information
management applications.
IP
Internet Protocol. A set of rules used to send and receive messages across local networks and the
Internet.
IP telephony Technology that supports voice, data and video transmission via IP-based LANs, WANs, and the
Internet. This includes VoIP (Voice over IP).
IP address A 32-bit number that identifies each sender or receiver of information that is sent across the Internet.
An IP address has two parts: an identifier of a particular network on the Internet and an identifier of
the particular device (which can be a server or a workstation) within that network.
IPX-SPX
Internetwork Packet Exchange, a networking protocol used by the Novell NetWare operating
systems. Like UDP/IP, IPX is a datagram protocol used for connectionless communications. Higher-
level protocols, such as SPX and NCP, are used for additional error recovery services. Sequenced
Packet Exchange, SPX, a transport layer protocol (layer 4 of the OSI Model) used in Novell Netware
networks. The SPX layer sits on top of the IPX layer (layer 3) and provides connection-oriented
services between two nodes on the network. SPX is used primarily by client/server applications.
ISDN
A type of broadband Internet connection that provides digital service from the customer's premises to
the dial-up telephone network. ISDN uses standard POTS copper wiring to deliver voice, data or
video.
ISO Network
Model A network model developed by the International Standards Organization (ISO) that consists of seven
different levels, or layers. By standardizing these layers, and the interfaces in between, different
portions of a given protocol can be modified or changed as technologies advance or systems
requirements are altered. The seven layers are: Physical , Data Link, Network, Transport, Session,
Presentation, Application.
LAN Local Area Network. A system of connecting PCs and other devices within the same physical
proximity for sharing resources such as an Internet connections, printers, files and drives.
Receive
Sensitivity The minimum signal strength required to pick up a signal. Higher bandwidth connections usually
have less receive sensitivity than lower bandwidth connections.