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which the route exists, the distance to the remote address and the cost of
sending data over the route.
Router A system responsible for making decisions about which of several
paths network (or Internet) traffic will follow. To do this it uses a routing
protocol to gain information about the network, and algorithms to choose the
best route based on several criteria known as "routing metrics".
S
Server A network device that provides services to client stations. Examples
include file servers and print servers.
Service A term used with the router to refer to a connection to another port
on (another) router, used to access dialup modems, hosts that do not support
TCP/IP and other asynchronous devices.
SNMP Simple Network Management Protocol. The Internet standard
protocol developed to manage nodes on an IP network. See MIB.
Subnet A portion of a network, which may be a physically independent
network segment, which shares a network address with other portions of the
network and is distinguished by a subnet number. A subnet is to a network
what a network is to an internet.
Subnet Address The subnet portion of an IP address. In a subnetted network,
the host portion of an IP address is split into a subnet portion and a host
portion using an address or subnet mask. See subnet mask, IP address and
network address.
Subnet Mask A bit mask used to select bits from an Internet address for
subnet addressing. The mask is 32 bits long and selects the network portion
of the Internet address and one or more bits of the local portion. Sometimes
called address mask.
T
TCP Transmission Control Protocol. The TCP/IP standard transport layer
protocol in the Internet suite of protocols, providing reliable, connection-
oriented, full-duplex streams. It uses IP for delivery.
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