88
4
4
T
T
e
e
r
r
m
m
i
i
n
n
o
o
l
l
o
o
g
g
y
y
Abbrev. Full Term Meaning
EoA Ethernet-over-ATM EoA protocol is commonly used to carry data
between local area networks that use the Ethernet
protocol and wide-area networks that use the ATM
protocol. Many telecommunications industry
networks use the ATM protocol. ISPs who provide
DSL services often use the EoA protocol for data
transfer with their customers' DSL modems.
VPI Virtual Path Identifier for set up ATM Permanent Virtual Channels(PVC).
VCI Virtual Channel Identifier for set up ATM Permanent Virtual Channels(PVC).
EoA
EoA (Ethernet-over-ATM) protocol is commonly used to carry data between local area networks that use the Ethernet
protocol and wide-area networks that use the ATM protocol. Many telecommunications industry networks use the
ATM protocol. ISPs who provide DSL services often use the EoA protocol for data transfer with their customers' DSL
modems.
EoA can be implemented to provide a bridged connection between a DSL modem and the ISP. In a bridged connection,
data is shared between the ISP's network and their customer's as if the networks were on the same physical LAN.
Bridged connections do not use the IP protocol. EoA can also be configured to provide a routed connection with the
ISP, which uses the IP protocol to exchange data.
IPoA
IPoA (Dynamic IP over ATM) interfaces carries IP packets over AAL5. AAL5 provides the IP hosts
on the same network with the data link layer for communications. In addition, to allow these
hosts to communicate on the same ATM networks, IP packets must be tuned somewhat. AS the
bearer network of IP services, ATM provides high speed point-to-point connections which
considerably improve the bandwidth performance of IP network. On the other hand, ATM
provides excellent network performance and perfect QoS.