If it is possible then please answer this asap?

How is it possible to install a fresh call manager from cisco recovery disk 8.6 version when everything is cleared from the hard disk?

@piyush kataria pls reply asap

Hi,H

ow a switch knows whether an IP phone or Pc is connected to it?

Second ques

How does it get its power?

If cdp is not there then through which it would know which voice vlan?

@paras jairath you mean to say that one should opt for security ? And what about UC see.... In collaboration its like 2 years experience from now on would be developed.

Can you brief me about each of them with future scope

So which is best ? According to you ?

Hi,  am working as a network engineer in a MNC and am littile bit confuse in which domain to pursue my career whether in  Voice i.e collaboration or Security ( firewalls ) and i know everything depends upon your interest but i would develop my interest in which ever domain is study and that's the fact. So i want to ask that which is the better among them and in which one should opt for... (more)