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Reference Manual for the Model DG814 DSL Modem Internet Gateway
Glossary
3
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.
NID
Network Interface Device. The point of demarcation, where the telephone line
comes into the house.
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.