You work as a Network Designer for Tech Perfect Inc. You are designing a WAN network for the
company. You have to balance the current and future uses of the transport and other network
components, customer requirements, customer perceptions, and the costs of the various network
components. According to the situation, which of the following are the best solutions for the
company?
Each correct answer represents a complete solution. Choose two.

A.
SONET

B.
SDH

C.
ATM

D.
CWDM