Email is a method for exchanging digital messages between an author and one or more recipients over the internet or computer networks. Early email systems required both parties to be online simultaneously, but modern email uses a store-and-forward model where messages are stored on email servers until the recipient connects. Email servers accept messages, forward them to the correct recipient, and store messages so users do not need to be online at the same time to communicate via email.

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ชั้น ม.5/5 เลขที่ 24

2. EMAIL
e-mail since ca. 1993 is a method of exchanging digital
messages from an author to one or more recipients. Modern
email operates across the Internet or other computer
networks. Some early email systems required that the author
and the recipient both be online at the same time, in common
with instant messaging. Today's email systems are based on a
store-and-forward model
EMAIL

3. Email servers accept, forward, deliver, and store
messages. Neither the users nor their computers are
required to be online simultaneously; they need connect
only briefly, typically to a mail server, for as long as it
takes to send or receive messages.

5. social
networkA social network is a social structure made up of a set of social
actors (such as individuals or organizations) and a set of the
dyadic ties between these actors. The social network perspective
provides a set of methods for analyzing the structure of whole
social entities as well as a variety of theories explaining the
patterns observed in these structures. The study of these
structures uses social network analysis to identify local and
global patterns, locate influential entities, and examine network
dynamics.