Allied Telesis AT-8202 - Manual (Page 77)

AT-8202 ATM Uplink User’s Guide
A-3
LECS (LAN emulation
configuration server) One of the components of LAN emulation, it is the service that
maintains tables of virtual addresses. A given LEC can query this
database for the address of the LAN emulation server (LES) with
which the LEC needs to register.
LES (LAN emulation
server) One of the components of LAN emulation, this is the service that
resolves MAC and ATM address mappings for LAN emulation clients.
MTU (maximum
transmission unit) The largest possible unit of data that can be transmitted on a given
physical medium using a given protocol.
NNI (network-to-
network interface) An interface connecting private or public switches. A private NNI is
between two private network switches within a building. A public
NNI is between two public switching devices that create a WAN. The
NNI specification can be applied in both switch-to-switch and
network-to-network situations.
PVC (permanent
virtual circuit) A dedicated connection between DTE devices configured manually
to be used for a single purpose. This is comparable to a leased line
between communicating devices.
PTOP (point-to-point) A communication link between two end objects or computer
systems in a network of computers.
A PTOP connection link or type requires a set up between two or
more parties before end systems can communicate with each other.
RIP (routing
information protocol) A distance-vector protocol in the IP suite (used by IP and IPX
network-layer protocols) that enables routers in the same
autonomous system to exchange routing information by means of
periodic updates. For RIP, the best path to a destination is the path
with the fewest hops. RIP computes the distance as a metric, usually
the number of hops from the network of origin to the destination.
SVC (switched virtual
circuit) On-demand connection between ATM or Frame Relay source and
destination that lasts only for the duration of the transmission.
UNI (user-to-network
interface) Generic term to indicate interfaces to both public or private Frame
Relay or ATM networks. Typically end point devices such as client
workstations, client servers, or ATM routers. The current UNI
specification describes the signaling protocols that let users set up
connections between ATM devices in customers’ equipment or
public carrier equipment. The UNI specification includes support for
SVCs.
VC (virtual circuit) A network service that provides connection-oriented service
regardless of underlying network structure.
VC (virtual channel) A concept used to describe unidirectional transport of ATM cells
associated by a common unique identifier value.