I am building my lab for the CCIE voice and I am getting ready to add on IPCC. The webpages for the Lab show that it uses version 4.0(1). I have CD's for 4.0(5a).
Is there much difference between the two? would i be safe using the 4.0(5a) version or would i be better off finding 4.0(1) cd's
If so, anyone know where i can get my hands on or download 4.01?