Whichofthefollowingarevalidmodesofpacketswitchingonmostrouters？（Chooseallthatapply.）（）

A.CiscoExpressFonvarding
B.FIBswitching
C.Cacheswitching
D.Optimizedswitching
E.Processswitching
F.Fastswitching

【参考答案】

A, E, F