I already have SRX210 and I am preparing for my JNCIS.
1. Do I need to buy EX2200-C for JNCIS if I already have SRX210
2. What features in EX2200-C that didn't available in SRX210 and vice versa
I understand SRX is FW+Router which have VPN feature that didn't exist in EX.
How about ntp, dhcp server feature etc
For the specialist level exams in ENT and SEC, i would say having the SRX alone would be sufficent for getting some hands on. I'm not a user of the MX or service provider platforms, so I'm not sure how far the SRX can carry you there. But I have seen descriptions from education and lab vendors that rent SRX labs for SP preparation. So I would guess the SRX woudl be good for the JNCIS-SP too.
There are switching features not available on the SRX. A good quick reference page for the EX feature set comparison by model is this feature overview page.
I did pick up an EX2200 for practice. Nothing beats having lab gear for being able to experiment if you can afford it.
For SRX features
http://www.juniper-ie.com/forum/29-jncie-ent-written-exam-lab-exam/I am really excited to start new journey lets join together and we can gain more knowledge what is there in the lab exact modelof routers/switches so that we can practice and make ourself more accurate whoever interested can join the skype groupso that we can start the discussion.Click on below link to join the skype group orelse see on forum http://juniper-ie.com-- ENThttps://join.skype.com/dVv0rYDpxVLQ-- SEChttps://join.skype.com/nyT2RFUQWVGO-- SPhttps://join.skype.com/aKmK1QrCX9T6-- DChttps://join.skype.com/d87bSCeDUdmGCheers