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WebCaching question



  Hi,


     I have a question about webcaching application.
 Suppose I have created the following http nodes:

    set client_(0) [new Http/Client $ns_ $node_(0)]
    set client_(1) [new Http/Client $ns_ $node_(1)]
    set cache_ [new Http/Cache/TTL $ns_ $node_(2)]
    set server_ [new Http/Server $ns_ $node_(3)]

   If I know the id of node_(2), and node_(3), I would like to refer back 
to cache_ and server_.  How can I get the http node from node id?

   
  Thanks in advance,
  Pol.