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Page 146 / 154 Scroll up to view Page 141 - 145
Reference Manual for the Model RP614 Web Safe Router
C-22
Preparing Your Network
Page 147 / 154
Glossary
1
Glossary
10BASE-T
IEEE 802.3 specification for 10 Mbps Ethernet over twisted pair wiring.
100BASE-Tx
IEEE 802.3 specification for 100 Mbps Ethernet over twisted pair wiring.
802.11b
IEEE specification for wireless networking at 11 Mbps using direct-sequence
spread-spectrum (DSSS) technology and operating in the unlicensed radio
spectrum at 2.5GHz.
ADSL
See
Asymmetric Digital Subscriber Line
Asymmetric Digital
Subscriber Line
A technology for sending data over regular telephone lines. ADSL allows data
rates up to 8 Mbps downstream and 640 Kbps upstream.
Denial of Service
attack
DoS. A hacker attack designed to prevent your computer or network from
operating or communicating.
DHCP
See
Dynamic Host Configuration Protocol.
DNS
See
Domain Name Server.
Domain Name
A descriptive name for an address or group of addresses on the Internet.
Domain names are of the form of a registered entity name plus one of a
number of predefined top level suffixes such as .com, .edu, .uk, etc. For
example, in the address mail.NETGEAR.com, mail is a server name and
NETGEAR.com is the domain.
Domain Name Server
A Domain Name Server (DNS) resolves descriptive names of network
resources (such as www.NETGEAR.com) to numeric IP addresses.
DSLAM
DSL Access Multiplexor. The piece of equipment at the telephone company
central office that provides the ADSL signal.
Page 148 / 154
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway
2
Glossary
Dynamic Host
Configuration
Protocol
DHCP. An Ethernet protocol specifying how a centralized DHCP server can
assign network configuration information to multiple DHCP clients. The
assigned information includes IP addresses, DNS addresses, and gateway
(router) addresses.
Gateway
A local device, usually a router, that connects hosts on a local network to other
networks.
IP
See
Internet Protocol.
IP Address
A four-byte number uniquely defining each host on the Internet. Ranges of
addresses are assigned by Internic, an organization formed for this purpose.
Usually written in dotted-decimal notation with periods separating the bytes
(for example, 134.177.244.57).
IPSec
Internet Protocol Security. IPSec is a series of guidelines for securing private
information transmitted over public networks. IPSec is a VPN method
providing a higher level of security than PPTP.
ISP
Internet service provider.
Internet Protocol
The main internetworking protocol used in the Internet. Used in conjunction
with the Transfer Control Protocol (TCP) to form TCP/IP.
LAN
See
local area network.
local area network
LAN. A communications network serving users within a limited area, such as
one floor of a building. A LAN typically connects multiple personal
computers and shared network devices such as storage and printers. Although
many technologies exist to implement a LAN, Ethernet is the most common
for connecting personal computers.
MAC address
Media Access Control address. A unique 48-bit hardware address assigned to
every Ethernet node. Usually written in the form 01:23:45:67:89:ab.
Mbps
Megabits per second.
MSB
See
Most Significant Bit or Most Significant Byte.
MTU
See
Maximum Transmission Unit.
Maximum Transmit
Unit
The size in bytes of the largest packet that can be sent or received.
Most Significant Bit or
Most Significant Byte
The portion of a number, address, or field that is farthest left when written as a
single number in conventional hexadecimal ordinary notation. The part of the
number having the most value.
Page 149 / 154
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway
Glossary
3
NAT
See
Network Address Translation.
Netmask
A number that explains which part of an IP address comprises the network
address and which part is the host address on that network. It can be
expressed in dotted-decimal notation or as a number appended to the IP
address. For example, a 28-bit mask starting from the MSB can be shown as
255.255.255.192 or as /28 appended to the IP address.
Network Address
Translation
A technique by which several hosts share a single IP address for access to the
Internet.
packet
A block of information sent over a network. A packet typically contains a
source and destination network address, some protocol and length
information, a block of data, and a checksum.
PPP
See
Point-to-Point Protocol.
PPPoA
See
PPP over ATM
PPPoE
See
PPP over Ethernet
PPP over ATM
PPPoA. PPP over ATM is a protocol for connecting remote hosts to the
Internet over an always-on connection by simulating a dial-up connection.
PPP over Ethernet
PPPoE. PPP over Ethernet is a protocol for connecting remote hosts to the
Internet over an always-on connection by simulating a dial-up connection.
PPTP
Point-to-Point Tunneling Protocol. A method for establishing a virtual private
network (VPN) by embedding Microsoft’s network protocol into Internet
packets.
PSTN
Public Switched Telephone Network.
Point-to-Point
Protocol
PPP. A protocol allowing a computer using TCP/IP to connect directly to the
Internet.
RFC
Request For Comment. Refers to documents published by the Internet
Engineering Task Force (IETF) proposing standard protocols and procedures
for the Internet. RFCs can be found at www.ietf.org.
RIP
See
Routing Information Protocol.
router
A device that forwards data between networks. An IP router forwards data
based on IP source and destination addresses.
Routing Information
Protocol
A protocol in which routers periodically exchange information with one
another so that they can determine minimum distance paths between sources
and destinations.
Page 150 / 154
Reference Manual for the Model DG824M Wireless ADSL Modem Gateway
4
Glossary
subnet mask
See
netmask.
UTP
Unshielded twisted pair. The cable used by 10BASE-T and 100BASE-Tx
Ethernet networks.
VCI
Virtual Channel Identifier. Together with the VPI, defines a Virtual Channel
through an ATM network. Used by ATM switching equipment to route data
through the network.
VPI
Virtual Path Identifier. Together with the VCI, defines a Virtual Channel
through an ATM network. Used by ATM switching equipment to route data
through the network.
WAN
See
wide area network.
WEP
Wired Equivalent Privacy. WEP is a data encryption protocol for 802.11b
wireless networks. All wireless nodes and access points on the network are
configured with a 64-bit or 128-bit Shared Key for data encryption.
wide area network
WAN. A long distance link used to extend or connect remotely located local
area networks. The Internet is a large WAN.
Wi-Fi
See
802.11b. A trade name for the 802.11b wireless networking standard,
given by the Wireless Ethernet Compatibility Alliance (WECA, see http://
www.wi-fi.net), an industry standard group promoting interoperability among
802.11b devices.
Windows Internet
Naming Service
WINS. Windows Internet Naming Service is a server process for resolving
Windows-based computer names to IP addresses. If a remote network
contains a WINS server, your Windows PCs can gather information from that
WINS server about its local hosts. This allows your PCs to browse that remote
network using Network Neighborhood.
WINS
See
Windows Internet Naming Service.

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