That is enough for the e-mail to get to KSU from another location. The system at K-State knows from this that this represents the KSU Unix computers. Data transmitted on the network is divided into smaller parts called packets . The process of breaking a message into smaller parts is called packet switching . More on the enterprise component of the address.
Enterprise refers to the type of organization.
By the way, these are real addresses. This is at the heart of Internet use. Client software on your computer does the work on your end - it establishes connection, sends requests, etc. The server program runs on the remote computer - often a very large powerful computer capable of storing massive amounts of information and processing it very fast. It is always running - it simply waits in a dormant state until it is asked to do something.