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<body class='hmmessage'> From: davmor2@gmail.com<br>> To: wolves@mailman.lug.org.uk<br>> Date: Sat, 26 Jan 2008 21:33:33 +0000<br>> Subject: [Wolves] I have just recieved my N+ first course book and have a query......<br>> <br>> In the text it says a bus topology follows the 5-4-3 rule.<br>> 5 network segments (what the hell is a segment? Is it just as simple<br>> as 5 section where computers can be added)<br>> 4 repeaters (these I understand improve the signal strength)<br>> 3 of the 5 segments can have nodes. (why?)<br>> <br>> Help please it's thrown me and I know that your explainations will make<br>> more sense than the course providers :)<br>> -- <br>> Seek That Thy Might Know<br><br><h3><font face="Times New Roman, Times, Serif" size="3">5-4-3 Rule</font></h3>
<font face="Times New Roman, Times, Serif" size="3"> </font><font face="Times New Roman, Times, Serif" size="3">A consideration in setting up a tree topology using Ethernet protocol
is the 5-4-3 rule. One aspect of the Ethernet protocol requires that a
signal sent out on the network cable reach every part of the network within
a specified length of time. Each concentrator or repeater that a signal
goes through adds a small amount of time. This leads to the rule that
between any two nodes on the network there can only be a maximum of 5
segments, connected through 4 repeaters/concentrators. In addition, only
3 of the segments may be populated (trunk) segments if they are made of
coaxial cable. A populated segment is one which has one or more nodes
attached to it . In Figure 4, the 5-4-3 rule is adhered to. The furthest
two nodes on the network have 4 segments and 3 repeaters/concentrators
between them. </font><BR>
<font face="Times New Roman, Times, Serif" size="3"> </font><font face="Times New Roman, Times, Serif" size="3">This rule does not apply to other network protocols or Ethernet networks
where all fiber optic cabling or a combination of a fiber backbone with UTP
cabling is used. If there is a combination of fiber optic backbone and UTP
cabling, the rule is simply translated to 7-6-5 rule.</font><BR><br><BR><font face="Times New Roman, Times, Serif" size="3">http://www.teach-ict.com/as_a2/topics/networks/pages/chap5.htm<br></font><BR><br><br /><hr />She said what? About who? <a href='http://www.msnsearchstar.com' target='_new'>Shameful celebrity quotes on Search Star!</a></body>
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