多项选择题
A.Optimized processing of content delivery
B.Optimized processing of bandwidth requests
C.Optimized processing of content requests
D.Optimized processing of error notification
单项选择题 Which content network component maintains original source content and publishes content to the network edge?（）
多项选择题 Internet Protocol videoconferencing (IP/VC) provides which two business benefits? （）
多项选择题 You are the network consultant from passguide.com. You have been asked for which two features of optical networks allow data to be transmitted over extremely long distances? （）