The corollary of liberal use, of course, is that the network can become heavily loaded, degrading its level of service. T3 will transmit data at 45 Mbps, roughly 28 times faster than the present, T1, speed. T3 is scheduled to be operational by the end of 1990. Internet's fundamental principle has caused it to become quite ubiquitous, but its focus remains largely on academics and research. Internet cannot be used for commercial purposes or for sending large amounts of unsolicited mail.
Regulation is largely through peer pressure and has been, so far, enormously effective.
It is not unusual to find dozens of LANs within a large university. Some LANs are simply several individual microcomputers and a printer linked together. In other schemes a LAN is linked to a campus mainframe. In still other configurations, one LAN is linked to one or more other LANs. Under the multiple LAN environment, if there are incompatible LANs linked, they may not be able to intercommunicate and thus their users will not be able to exchange e-mail.