an enterprise business network develops to incorporate more branch offices, internet business administrations, or world operations, a small network like office LAN is never again adequate. it is impossible to handle requirements by LAN. This issue has made WAN an integral part of the enterprises because WAN offers various technologies and services to meet the requirements of the network. Geographically, WAN covers more area than other network which arises problems of security and management. Critically discuss the type of WAN technologies that offers optimum performance for networks