I donot think these CTOs use fibre optic cables as they are expensive to buy , install , and maintain.Even mine one says they are using fibre cable but it is actually a thick coaxial cable.And even if they put in the best connecting media in between your pc and their gateway the speeds are not gonna improve, because the internet speeds are controlled by Sify's servers, so unless sify increases the speed ur speeds won't increase.An antivirus has got nothing to do with IP collisions, and how do you ensure that every pc in the LAN has an antivirus. Do they keep coming to your house to check it. And if you use their SecureSynergy antivirus, u better get another one. Get AVG or NOD32A switch is always better than a hub unless you need to sniff.