A:AnswerIt doesn't. However, it does have a DisplayPort output on the right side of the computer. If your external monitor doesn't have an DisplayPort input, you can get an adapter that will take the HDMI cable from the monitor and plug it into the DisplayPort.
A:AnswerIt doesn't have a WiFi card listed in the specs. However, you can use an external WiFi adapter that plugs into one of the computer's USB ports.
A:AnswerA computer may be refurbished for any number of reasons, so it's impossible to say why a particular unit was refurbished. The warranty on this computer is one year on parts and labor.