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FEATURE 1
For a Thorough Understanding of E-Mail
Learning about the mechanism by examining how mailer software works
- E-mail is now taken for granted by everyone as a way of communication.
Taking a different approach from other attempts to explain its mechanism,
this article reveals the mechanism through an examination of how mailer
software works.
Introduction: Three tasks performed by mailer software
Format Conversion: All e-mail messages and attached files are
converted into a common format based on 7-bit codes
Sending: A one-to-one dialogue is conducted between mailer software
and a sever, and there is only one procedure for sending e-mail
Receiving: A server starts communicating with mailer software
only after the server authenticates you based on your POP3 username
and password, and it is mailer software that manages received e-mail
Summary: Manually doing the tasks of mailer software
FEATURE 2
Prohibited Techniques and the Don’ts of Network Security
- We interviewed well-seasoned experts on networks to collect cases
in which crises were caused by common misunderstandings, errors likely
to be made, and sloppy operations transpired due to a lack of understanding
in the field of network security. Similar incidents are no doubt occurring
near you on a daily basis.
This article explains why such incidents occur and helps you to avoid
these pitfalls.
Prohibited Technique 1: Don’t put too much confidence in
automatic updates
Prohibited Technique 2: Don’t connect a brand-new PC directly
to the Internet
Prohibited Technique 3: Don’t connect your own devices for
personal use to a network without permission
Prohibited Technique 4: Don’t use free software without
careful consideration
Prohibited Technique 5: Don’t forget to delete accounts
used for testing
Prohibited Technique 6: Don’t use a password that can be
broken easily
Prohibited Technique 7: Don’t forget to update the software
of dedicated devices
To Avoid the Don’ts: It is meaningless to formulate security
policies that cannot be followed
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