单项选择题 An administrator is implementing a second server due to the increased usage. Which of the following optimization techniques is the administrator using?（）

单项选择题 A technician needs to install additional access points for a new high speed connection being added in the new office space. Which of the following will MOST likely be installed to allow additional CAT5 cable connections?（）

单项选择题 Which of the following LAN technologies is considered fast Ethernet and uses two pairs of cabling,one pair for sending and the other pair for receiving?（）