Domain

user

sms

voip

IM

Online community

phishing

if you get email you didn't ask for?

Digital signatures
advantages

Netiquite

cc

bcc

Click '''

flag an email

create a new folder

move it to a certain folder

WWW

isp

URL

hyperlink

structure of web address?

http

web browser

rss

podcast
purpose of it?

identify a secure website or page

encryption

viruses

worms

Trojan horses

spyware

malware

digital certificate for website

bookmarks