Thanks Richard.I have a question about Jitter calculation. How is it calculated and do we have better control of jitter with private ntp architecture and how ?Thanks for your help

I have a device in my home (pc/ipod/set top box) which uses at&t internet and i want to synchronie the time using ntp public server. How is it secured?if the time is messed up with stb, then the time displayed on tv and also recordings of tv shows w...

and also if i am not using a dedicated ip address for the ntp server but using a pool name like pool.ntp.org

Hello Richard,If I have a device in my home but no firewall, how do i protect it?I guess we can run authentication (which might increase overhead) and use server that supports authenticated packets, right?

Thanks leo and richard for you replies.So, I take it : a normal ntp packet is around 60 bytes without udp and ip headers.What about Authenticated packet header size?And if i am configuring ntp on a device which uses public internet to access the ntp...