Re: ppp hdlc [7:10737]

2001-07-03 Thread Mohamed El Komy

Both PPP and HDLC are encapsulation protocols on serial interfaces.But PPP
is better than HDLC in 2 main points:

1- PPP supports multiple network layer encapsulation (IP,IPX,AppleTalk,...)
while standard HDLC supports only IP encapsulation.[Cisco HDLC supports
multiple network layer encapsulation].

2- PPP suports both PAP and CHAP authentication protocols which provides a
secure point-to-point session while HDLC doesn't support that.

friend  wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
 Dear all
 pls show me difference ppp and hdlc




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Re: ppp hdlc [7:10737]

2001-07-02 Thread MikeN

I agree. PPP is a non-proprietary protocol and HDLC is vendor specific. If
you are connecting to a non Cisco device, use PPP. If you are connecting 2
Cisco devices, use HDLC. HDLC is the default encapsulation on Cisco routers.

HTH
MikeN
Network Engineer

Brian  wrote in message
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 one glaring difference, I have heard that Cisco's hdlc is modified so it
 will not work with non cisco hdlc.  PPP is PPP, you can attach a non Cisco
 router running pp to it and be successful.

 Brian Sonic Whalen
 Success = Preparation + Opportunity


 On Mon, 2 Jul 2001, friend wrote:

  Dear all
  pls show me difference ppp and hdlc




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RE: ppp hdlc [7:10737]

2001-07-02 Thread Preston Kilburn

One difference between PPP and HDLC is that PPP supports authentication from
PAP (password authentication protocol) and CHAP (Challenge Handshake
Authentication Protocol).  I believe that PPP runs over ISDN and HDLC
doesn't (but don't quote me on that one, I'm not sure).
-P


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Re: ppp hdlc [7:10737]

2001-07-02 Thread MikeN

Excellent point Preston. We can't forget multilink either. HDLC is also the
default encap for ISDN:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/dial
ts_c/dtsprt3/dcdbri.htm#xtocid771414

HTH
MikeN
Network Engineer

Preston Kilburn  wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
 One difference between PPP and HDLC is that PPP supports authentication
from
 PAP (password authentication protocol) and CHAP (Challenge Handshake
 Authentication Protocol).  I believe that PPP runs over ISDN and HDLC
 doesn't (but don't quote me on that one, I'm not sure).
 -P




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