Protocols(contd)2+IF-elif-else

Good Morning boys

In today's session also, we will divide the class in two parts.
In the first half , we will learn about few PROTOCOLS used by computers for e-mail purpose and in the second half, we will further look at the detailed working of IF-elif-else Decision Construct, as requested by few students.
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The Google Meeting ID

Meeting ID

meet.google.com/bsp-uyay-pby

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By the end of today's session, you will be able to

• Understand the need for protocols while communicating on the internet.
• Understand the method of e-mail communication using SMTP Protocol.
• Understand the purpose of authentication.

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E-mail Protocols

• E-mail stands for Electronic mail
•  E-mail messages are usually sent to an e-mail server which stores received messsages in the recipient's email in box.
• The user retrieves messages with either
• the web browser or
• an e-mail client that uses one of the e-mail retrieval protocols.
• designed for retrieving messages and managing mail boxes
• For this reason Client Applications usually use one of the following to access their mail accounts on a mail server for receiving messages:
• Post Office Protocol(POP) or
• Internet Message Access Protocol(IMAP)  
• These protocols are used by Mozilla Firefox thunderbird, Apple mail etc.

Simple Mail Transfer Protocol (SMTP):

• is an internet standard for electronic mail(e-mail) transmission across Internet Protocol(IP) networks.
• Used by electronic mail servers and other mail transfer agents to send and receive mail messages.
• User-level client mail applications generally only use SMTP for sending messages to a mail server for relaying.
• It is ONLY a delivery protocol.
• It cannot retrieve messages from a remote server on demand.
• It has no facility for authentication of senders.

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EXERCISE

1). Write a program in Python to accept the class of a student (in numbers). If the class entered is 10 or 12, display"Board Class" else display "Non-Board Class".

2) Write a program in Python to accept a number from the user check and print whether it is even, odd or zero.
(NOTE- even numbers on division by 2 give zero as remainder
               odd numbers on division by  2 give non-zero remainder)