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? （）

多项选择题 You are the network consultant from passguide.com. You should tell your clients Two technologies help them save much time from complex computing.（）