عنوان النشاط
Application Layer: Client server Application (Electronic Mail)
الجهة المنظمة
الكلية الاسلامية الجامعة / الهندسة / هندسة تقنيات الحاسوب
تأريخ الانعقاد
2016-02-28
مكان الانعقاد
الجامعة الاسلامية / النجف الاشرف
نبذة مختصرة
المحور الاول :
Today, electronic mail is much more complex than a past. It allows a message to include text, audio, and video. It also allows one message to be sent to one or more recipients. The general architecture of an e-mail system including the three main components: user agent, message transfer agent, and message access agent.
المحور الثاني :
To send mail, a system must have the client MTA, and to receive mail, a system must have a server MTA. The formal protocol that defines the MTA client and server in the Internet is called the Simple Mail Transfer Protocol (SMTP).
المحور الثالث :
The first and the second stages of mail delivery use SMTP. However, SMTP is not involved in the third stage because SMTP is a push protocol; it pushes the message from the client to the server. On the other hand, the third stage needs a pull protocol; the client must pull messages from the server.