The correct answer is ATZ.
ATZ is a command used to reset a modem. It stands for “Atttention Zmodem”. When this command is sent to a modem, it will reset the modem to its factory default settings. This can be useful if the modem is not working properly or if you need to change its settings.
ATR stands for “Answer to Reset”. It is a response that a modem sends when it is reset. The ATR contains information about the modem’s configuration, such as its baud rate, parity, and stop bits.
DTE stands for “Data Terminal Equipment”. It is the device that sends data to the modem. The DTE can be a computer, a terminal, or another device.
DCE stands for “Data Communications Equipment”. It is the device that receives data from the modem. The DCE can be a modem, a router, or another device.
None of the above is not the correct answer.