Seek network management issues

2 The first issue
:My school is such a network to ask this kind of network are the types of networks:
rely on a machine to convert optical signals after Shuangjiao line connected to a hub On several separate lines re-assigned to several hub to connect all computers.
Teachers quarters of them from farther away than it is to top out at the Media Converter through the use of a fiber-optic transmission to the dormitory Media Converter and then converted to use the hub assigned to various computers.On the way the transmission medium is, of course, the optical fiber.We are here as long as the TCP / IP settings that IP, and DNS gateway to the Internet can be.Of course, is the gateway Fixed.What kind of a network of such a network?
Second question:If there are any teachers to use popular movies, or under the BT network as a whole, then things will be very slow.I would like to ask how to solve.Can not be as telecommunications Broadband as an account number to a teacher who can log on the Internet, but also can be set up to provide only the highest rate of flow is 50KB / S of speed.So can it be done??

Integral itself is limited, If the problem is to solve some additional points.

First, this is your school's local area network ah.Can only use the fiber-optic backbone, Can achieve long-distance transmission lines 100M breakthrough in the general restrictions on the distance, if you use gigabit optical converter, you are the backbone of the realization of a Gigabit exchanged.
Second.This function can be realized, But you need a gateway or firewall support of it.Can support a separate limit of IP connectivity and flow.This is a local area network environment
As for the latter, you can use specialized software agents, such as the proxy to achieve This feature