单项选择题 The network printer is locking up and printing garbled text. When the user cancels the job fromtheir local print queue, nothing happens. Which of the following is the MOST likely cause?（）

单项选择题 Which of the following ISP types requires an RJ-11 connection to the PC?（）

单项选择题 A company would like to create and maintain a web presence by operating a web server and anFTP server for users to upload and download job specifications. Which of the following Internetconnection types would be BEST suited for this type of traffic?（）