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Difference encapsulation ppp/hdlc

Can you tell me the difference between the encapsulation ppp and hdlc or show me a web site where i can get this informations.

Thinks

1 ACCEPTED SOLUTION

Accepted Solutions
Silver

Re: Difference encapsulation ppp/hdlc

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

2 REPLIES
Silver

Re: Difference encapsulation ppp/hdlc

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

Re: Difference encapsulation ppp/hdlc

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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