Nortel BayStack 820 Installation And Reference Manual page 246

Installation and Reference for the BayStack 820 ISDN Router
RIP
router
routing protocol
routing table
single IP address
SNA
Glossary-6
Routing Information Protocol. A distance-vector protocol in the IP suite (used
by IP and IPX network-layer protocol) that enables routers in the same
autonomous system to exchange routing information by means of periodic
updates.
An intelligent, multinetwork interface device that forwards data packets
between networks, based on network layer information and routing tables. A
router decides which path network traffic follows, using routing protocols to
gain information about the network and algorithms to choose the best route
based on a routing matrix.
A protocol used to exchange its routing table with all of its neighbor routers
(distance vector based), or all of the routers on the network (link state based).
A router relies on a routing table to determine where to forward a received
packet. The routing table normally contains, for each destination network, the
network address of the next hop router, the hop count to the destination, and
again count, among other information.
The aging count is for information aging purposes: the routing table is
periodically exchanged and kept up to date. If a router fails, any of the
networks reachable only through this router will become unreachable. The
routing table will reflect such failure by either (a) a router detecting the failure
and broadcasting the failure to everyone else, or (b) when the corresponding
routing entries in the routing table age count (no update from other routers for
a long time).
A feature that allows the local network to be divided into a public sub-network
and a private sub-network. All devices on the private sub-network will be
represented by the router to the WAN-side (outside) as one single IP address,
and therefore is effectively "hidden" and not accessible from the outside,
although such devices can still access the outside at will. All devices on the
public sub-network will conform to the standard IP address scheme and will
be accessible from the outside as usual.
Systems Network Architecture. A network protocol that supports peer-to-peer
networks of workstations.
206901-A