Reference; Ping Technology; Encapsulation Technologies For Ip Over Adsl; Classical Ip Over Atm - VeEX MTT-14B User Manual

MTT-14B e_Manual D07-00-083P RevA00

4 Reference

4.1 PING Technology

The name PING is derived from the SONAR world where one
pings an object in the water and listens for its echo. This con-
cept applies to the Internet world, where one pings an address
and waits for its echo (reply). This verifies that the end device is
present and that the connection is active.
The PING message is an ICMP (Internet Control Message Pro-
tocol) message. Both devices must be using TCP/IP protocol.
However, IP can be encapsulated onto the ADSL physical layer
in several ways. The following figure provides a summary of the
different implementation schemes for IP over ADSL.
Application
Software
Application
TCP/IP
Software
802.3 Ethernet
TCP/IP
RFC 1483
RFC 1483
AAL5/ATM AAL5/ATM
ADSL
ADSL
Ethernet over ATM

Classical IP over ATM

Figure 52 Encapsulation Technologies for IP over ADSL
Application
Software
TCP/IP
Application
Software PPP
TCP/IP
RFC 2516
PPP
802.3 Ethernet
RFC 2364
RFC 1483
AAL5/ATM AAL5/ATM
ADSL
ADSL
PPP over ATM PPP over Ethernet
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