Remember, SMTP is for sending emails, and IMAP/POP3 is for retrieving emails from a mail server.
PPP
HTTP
FTP
SMTP
The SMTP (Simple Mail Transfer Protocol) is used to send emails, while receiving emails typically involves protocols like IMAP or POP3. The other options, such as FTP (File Transfer Protocol) and HTTP (Hypertext Transfer Protocol), are not related to email communication.

A ladder of fixed length \( h \) is to be placed along the wall such that it is free to move along the height of the wall.
Based upon the above information, answer the following questions:
(iii) (b) If the foot of the ladder, whose length is 5 m, is being pulled towards the wall such that the rate of decrease of distance \( y \) is \( 2 \, \text{m/s} \), then at what rate is the height on the wall \( x \) increasing when the foot of the ladder is 3 m away from the wall?