Internet Flashcards
Internet
A global network of computer networks
Is WAN
Computer Network Classification
PAN, LAN, CAN (classified as LAN)
MAN, WAN (classified as WAN)
PAN
Personal Area Network
2, 3, 4 Computers in homes
WPAN: Wireless Personal Area Network
Very popular
LAN
Local Area Network
-2, 3, 4… used in business
WLAN: Wireless Local Area Network
CAN
Campus Area Network
Buildings geographically close
MAN
Municipal Area Network
Town, City
WAN
Wide Area Network
-Province, city, world
Special Features of Internet
Nobody owns it
Not tied to any particular device
ISP
Internet Service Providers
3 Basic internet Service Programs
Browsing (webpage browsing)
File Transfer
Electronic Mail (email)
Browsing
Is not Browser (Internet Browser
Browsing is an action and Browser is the tool used ex: Firefox, Chrome
Webpage Address
http://www.some-website.com/folder/subfolder/…/somewebpage.html
http:// -(scheme)
www. -(world wide web, default)
some-website -name
.com (commercial)
.net (virtual business)
.edu (education)
.org (non-profit organization)
some-website.com - Domain name (unique)
File Transfer
Client -> Server (upload)
Server -> Client (download)
Email vs. Snail Mail
- speed, cost, convenience, ecological
- physical items
FTP
File Transfer Protocol
id@some-provider.com
-Two components of email are connected by the @ sign
Packet Switching
Packets travel individually and independently because they are not affected by one another or by the speed at which they travel (Speed of connection)
Comprise a file
Email Scams
Protect your personal information (ID thieft)
Know who you are dealing with
Take your time
Never pay for a “free” gift
Filter Tips: Avoiding scams
- Nigerian email scam
- Phishing (attempt to acquire passwords, usernames, etc.)
- Work at home scams
- Weight loss scams
- Foreign Lotteries
- Cure all products
- Check overpayment scams
- Pay-in-advance credit offers
- Debit relief scams, travel scams
Viruses
Small program created with the intention to do harm, destroy files, annoy the user
Will attach themselves to another file infecting that given file which then infects other files
Some Viruses act up right away while others might be triggered (event, date, program)
Vulnerable files
Executable files (never accept 3rd part executable files) Some non-executable files (ex: word documents containing macros)
Avoid Viruses
Antivirus (resident program)
