Chapter 18 NETWORK DESIGN AND IMPLEMENTATION J33 WAN Circuit Speed WAN circuit speed are often much slower than LaN speeds,so capacity and responsiveness is a consideration. Multiple routes often exist between two points, it is difficult to estimate how the network as a whole will respond that is where simulations can help 性制,行制点 www.gxmu.edu.cnWAN Circuit Speed WAN circuit speed are often much slower than LAN speeds，so capacity and responsiveness is a consideration. Multiple routes often exist between two points ，it is difficult to estimate how the network as a whole will respond . That is where simulations can help. www.gxmu.edu.cn Chapter 18 NETWORK DESIGN AND IMPLEMENTATION