Extreme Networks ExtremeWare XOS 11.3, Manual

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Glossary
ExtremeWare XOS 11.3 Concepts Guide
662
proxy ARP This is the technique in which one machine, usually a router, answers
ARP requests intended for another machine. By masquerading its
identity (as an endstation), the router accepts responsibility for routing
packets to the real destination. Proxy ARP allows a site to use a single
IP address with two physical networks. Subnetting is normally a
better solution.
PVST+ Per VLAN Spanning Tree +. This implementation of STP has a 1:1
relationship with VLANs. The Extreme Networks implementation of
PVST+ allows you to interoperate with third-party devices running
this version of STP. PVST is a earlier version of this protocol and is
compatible with PVST+.
Q
QoS Quality of Service. Policy-enabled QoS is a network service that
provides the ability to prioritize different types of traffic and to
manage bandwidth over a network. QoS uses various methods to
prioritize traffic, including IEEE 802.1p values and IP DiffServ values.
R
RADIUS Remote Authentication Dial In User Service. RADIUS is a client/
server protocol and software that enables remote access servers to
communicate with a central server to authenticate dial-in users and
authorize their access to the requested system or service. RADIUS
allows a company to maintain user profiles in a central database that
all remote servers can share. It provides better security, allowing a
company to set up a policy that can be applied at a single
administered network point. With RADIUS, you can track usage for
billing and for keeping network statistics.
RARP Reverse ARP. Using this protocol, a physical device requests to learn
its IP address from a gateway server's ARP table. When a new device
is set up, its RARP client program requests its IP address from the
RARP server on the router. Assuming that an entry has been set up in
the router table, the RARP server will return the IP address to the
machine which can store it for future use.
RFC Request for Comment. The IETF RFCs describe the definitions and
parameters for networking.
RIP Routing Information Protocol. This IGP vector-distance routing
protocol is part of the TCP/IP suite and maintains tables of all known
destinations and the number of hops required to reach each. Using
RIP, routers periodically exchange entire routing tables. RIP is suitable
for use only as an IGP.
RIPng RIP next generation. RIPng is one of the routing protocols used with
IPV6 and is similar to RIP.
P (Continued)