Which two actions are the most cost-effective ways to ensure that this new application is implemented properly?

An enter pose customer will deploy a centralized unified communications application to provide voice, video, and instant messaging to their branch offices Some of the branch offices are located m remote locations and are connected via a 1 5 Mb’s Layer 3 VPN connection.

Which two actions are the most cost-effective ways to ensure that this new application is implemented properly? (Choose two)
A . Use a low bitrate codec such as
B . 711
C . Use a low bitrate codec such as G 729
D . Set WAN optimization on the CE router to compress the voice packets for improved bandwidth utilization and performance
E . Set voice activity detection to avoid sending packets when the conversation is silent
F . Enable VRF-Lite on the CE router to create a separate voice VRF
G . Set LFI on the WAN connections to interleave the small voice packets with the large data packets

Answer: B,D