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Lectures notes for 2010 - KTH

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Alternative centralized model<br />

CU-SeeME uses another model - a Reflector (a centralized model)<br />

node<br />

node<br />

reflector<br />

node<br />

node<br />

node<br />

node<br />

Figure 2: Reflector<br />

• All sites send to one site (the reflector) overcomes the N 2 problems<br />

• The reflector sends copies to all sites<br />

Problems:<br />

• Does not scale well<br />

• Multiple copies sent over the same link<br />

• Central site must know all who participate<br />

Behavior could be changed by explicitly building a tree of reflectors - but then you<br />

are moving over to Steve Deering’s model.<br />

Maguire Alternative centralized model 8: 8 of 78<br />

maguire@kth.se <strong>2010</strong>.03.21 Internetworking/Internetteknik

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