A good text on general computer networking is: Computer Networks, 3rd ed., by Steinmetz and Nahrstedt , Prentice Hall, 1996.
A good reference on switching technology and other aspect of networking is: Data and Computer Communications, 4th ed., W. Stallings, Macmillan, 1994.
The Internet Multimedia Backbone (the MBONE) is introduced nicely in the following articles