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can anyone recommend

I have Sybex's routersim, as well as tried the routersim programs you can get off of download.com, but I need something a lot less buggy, with the ability to have several virtual routers, and at least 1 switch.

(I'm studying for the CCNA)
 
I recommend you buy cheap 2514 router really for studying the ccna and 2 switches or so. For multiple routers, you can create many virtual interfaces and can always set up router-on-a-stick and create most any network topology you need. Reason is that the sims are buggy and of limited worth really and the cost isn't that much once you take into acct the resale price.
 
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