Multi-level client-server network is a modernized form of client-server network for a special reason that is, here different applications and protocols are assigned in individual server. So, if one of the servers is crashed or stopped for a small or long time all the functions do not stop. It means all servers are individually configured such as DHCP server, DNS Server, Mail Server, FTP Server etc. for different purposes. In traditional client-Server Network system a client uses several applications from the same server. If the server is crashed, the total work of that network will be...