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5 4 3 2 rule

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bond007
Advisor

5 4 3 2 rule


Hi,

can anyone explain what is 5432 rule in Ethernet ?

Thanks and Regards,

Bond.
5 REPLIES
Sergej Gurenko
Trusted Contributor

Re: 5 4 3 2 rule

5-4-3 rule
From Wikipedia, the free encyclopedia

The Ethernet 802.3 standard created the 5-4-3 rule. It was created in the age of 10Base2 and 10BaseT when switches were expensive such that repeaters were useful. It states that five network segments can be joined using four repeaters and containing three segments that contain user connections. The purpose of the rule is to manage the amount of latency on a LAN.

This rule does not apply to switched networks, as they store and forward (buffer) data before transmitting it.
http://en.wikipedia.org/wiki/5-4-3_rule
Jasdev Singh
Esteemed Contributor
Solution

Re: 5 4 3 2 rule

Hi,

5 - the number of network segments
4 - the number of repeaters needed to join the segments into one collision domain
3 - the number of network segments that have active (transmitting) devices attached
2 - the number of segments that do not have active devices attached
1 - the number of collision domains

Try this link also will help,

http://compnetworking.about.com/od/networkdesign/l/blfaq018.htm


jasdev


(assigning points will be appreciated)
Sivakumar TS
Honored Contributor

Re: 5 4 3 2 rule

Hi Bond,

The 5-4-3 represents the creation of a single collision domain, and the numbers are maximums:

(5-) no more than five segments between any two nodes that communicate with each other,

(-4-) no more than four repeaters in those five segments,

and (-3) no more than three of the five segments can have active devices (clients or servers).

Regards,

Siva.
Nothing is Impossible !
Sivakumar TS
Honored Contributor

Re: 5 4 3 2 rule

I found this link which has a pictorial illustration of the concept,

http://www.tencorp.com/SALESTIP.NSF/0/5b465b14bfaee6c985256c52006e36a2?OpenDocument

Regards,

Siva.
Nothing is Impossible !
Jasdev Singh
Esteemed Contributor

Re: 5 4 3 2 rule

Hi Bond,

pls assign points if you get are happy with the post.


jasdev