this is a physical rule for physical subnets, and the rule resets if you
have

a switch,
a bridge, or
a router

between physical networks.

now logical networks have more rules that you have to abide by,

Dan


-----Original Message-----
From: Jim Wallentine [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, September 26, 2001 4:32 PM
To: NT System Admin Issues
Subject: RE: Network Login


A network should have no more than 5 segments, 4 repeaters and 3 mixing
segments between any two DTEs. 

 A mixing segment is a segment with more than 2 interfaces attached to
it. 
 
 A link segment is a coax UTP or fibre segment without DTE modes. 
 

When 5 segments are used the maximum length of a FOIRL (Fibre Optic
Inter-Repeater Link) should be no greater than 500m. 

When 4 segments are used then the maximum length of FOIRL may be
increases to 1000m. 

These rules are designed to: 

 minimise reflections 
 
 maintain acceptable attenuation 
 
 limit round trip times to 575 bit times (i.e. to maintain the required
collision domain) 
 
 limit the interframe gap shrinkage (must be less than 49 bits



-----Original Message-----
From: Dewar Charles R [mailto:[EMAIL PROTECTED]] 
Subject: RE: Network Login

I give. What's the 5,4,3 rule?

-----Original Message-----
From: Neil Harvey [mailto:[EMAIL PROTECTED]]

how many devices do you have segmenting your network? Are you breaking
the
5,4,3 rule?
Neil
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