I have two 1720 routers at home. I was wondering what is the minimum I need for the new ccna 802 exam. I was thinking of getting 1 more router and two more switches if I can afford it but I guess I just need to know what is the bare minimum. Also how does the new SDM stuff play into all this. Is that something I can download and use. A friend of mine said he passed with two routers and two 2900 series switches. Can it be done that way? I wil be using the sybex book. I have had a fe w CCNA classes in the past with lots of hands on exercises. My background is telecommunications and NOC atmospheres.