WAN-Wide area Network

http://www-dos.uniinc.msk.ru/tech1/1994/networks/wan.htm

Designing a Wide Area Network

http://www.datatech.com/hot/w96_3.htm

All About...Multicast Wide Area Network Services

http://www.starburstcom.com/mcast.htm

Local and Wide area Networks

http://www.officeiq.com/features/Wanwide.htm

http://www.unm.edu/~network/presentations/references/index.html