From: tom cheung (tkc9789@xxxxxxxxxxx)
Date: Sun Nov 18 2001 - 12:53:41 GMT-3
Parry's explanation is correct. Purpose of bit stuffing is a way for hosts
to distinguish the flag from data by inserting a zero for every five
consecutive 1s encountered in the data stream.
Tom
>From: "Chua, Parry" <Parry.Chua@compaq.com>
>Reply-To: "Chua, Parry" <Parry.Chua@compaq.com>
>To: "Ajit Das" <ajidas@cisco.com>, <ccielab@groupstudy.com>
>Subject: RE: bit stuffing
>Date: Sun, 18 Nov 2001 17:26:58 +0800
>
>Hi,
>
>Let me try ...
>01111110(start)011111010000101111101.............01111110(end)
>We all like byte as it is 8 bite. In bite oriental protocol, you see a
>stream of 010.....101
>and there must be a way to determine the start and end, flag is use for
>this purpose, flag
>consists of 0111110, ie start with "0" follow by six "1", we also send
>bonary data it may
>consists of any pattern, inorder to tell the communication device that
>it is a data and not
>a flag, bit stuffing is use, for any continues five "1", we insert a
>"0", so it will not
>mis interpret as flag. The receiving device will remove the "0" after
>receiving contimue
>of five "1", but if the six bit is a "1", then it is a flag and not
>data.
>
>Hope my explaination is correct.
>
>Regards
>Parry
>-----Original Message-----
>From: Ajit Das [mailto:ajidas@cisco.com]
>Sent: Sunday, November 18, 2001 2:45 PM
>To: ccielab@groupstudy.com
>Subject: bit stuffing
>
>
>Can someone explain me how bit stuffing works on hdlc or ppp
>encapsulated interface.
>
>Thanks in advance.
>Ajit
This archive was generated by hypermail 2.1.4 : Fri Jun 21 2002 - 06:45:17 GMT-3