Difference encapsulation ppp/hdlc

Answered Question
Dec 4th, 2007
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Can you tell me the difference between the encapsulation ppp and hdlc or show me a web site where i can get this informations.

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Correct Answer by shivlu jain about 9 years 5 months ago

HDLC is used on point-to-pont serial links suc as T1s, DS3 and now

Packet-over-SONET (POS). It has a low overhead in terms of the

additional bytes required over and above the layer 3 payload. There is

no authentication protocol for HDLC.



PPP was and is heavily used in async dial-up and provide for

authentication using PAP or CHAP protocol. Now there is also PPP over

Ethernet (PPPoE).


A variation of PPP known as multi-link PPP (MLPPP) is quite popular for

loading balancing parallet circuit like T1's.



regards

shivlu

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Correct Answer
shivlu jain Tue, 12/04/2007 - 00:10
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HDLC is used on point-to-pont serial links suc as T1s, DS3 and now

Packet-over-SONET (POS). It has a low overhead in terms of the

additional bytes required over and above the layer 3 payload. There is

no authentication protocol for HDLC.



PPP was and is heavily used in async dial-up and provide for

authentication using PAP or CHAP protocol. Now there is also PPP over

Ethernet (PPPoE).


A variation of PPP known as multi-link PPP (MLPPP) is quite popular for

loading balancing parallet circuit like T1's.



regards

shivlu

bvsnarayana03 Tue, 12/04/2007 - 00:13
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On routers, hdlc is the default encapsulation method available on interfaces. It doesnt provide authentication while ppp provides authentication so can be used isdn configs.

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