Bala

Hi , Thanks for the reply dear Friend. IF you know something about the Server based network please explain ..

Hi All, We are running a small company and have over all strength of around 40 users. Till this time we were not introduced any kind of security or policies . But recently we faced some data loss related issue and planning to secure network now.Right now the network topology as mentioning below. Using windows Xp,windows 7.(laptops and desktops). From ISP the connection leads to a Netgear router. ( this router itself act as DHCP and allocating IP's to the PC;s connected). From router directly connected to a 48 port based switch . and our 40 users are connected to this. Also we have enabled wifi for laptop users.. So i need a detailed help regrading what and all action steps i can take to make bettor this network. 1) whether i need a DNS server ? and if it is what impact it is going to make on this network or how it will help us in future ? 2) dhcp server ? 3) Active directory ? 4 ) a new cisco router ? 5) firewall ? Also i need to monitor the internet usage. whether i can manage these 40 systems with the help of centralized system? Please help me to resolve my all quires as soon as possible.