<h3>IMAP keeps email on an email server by default</h3>
Explanation:
POP3 stands for Post office protocol version 3. It is the one way mailing protocol that works by downloading the copy of the emails to the device so that they could be viewed offline when needed. The mails are deleted from the server once they are downloaded.
IMAP stands for Internet Message Access Protocol. Opposite to POP3, IMAP is the two way mailing protocol that donot download the entire content of the mail rather it downloads the headers only. The IMAP donot deletes the downloaded mails instead keep it one the server so that they could be used when ever needed.
The wake-up receiver is an ultra-low power chip that continuously looks out for a specific radio signal, called a wake-up signature, that tells it when to wake up the main device
