HOW THE INTERNET WORKS httpswwwyoutubecomwatchv7LPdttKXPc Network Personal Area Network PAN within a home Local Area Network LAN or Wireless Local Area Network WLAN network or wireless network within a small area such as a building or group of buildings ID: 720068
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Slide1
Introduction to networksSlide2
HOW THE INTERNET WORKS
https://www.youtube.com/watch?v=7_LPdttKXPcSlide3
Network
Personal Area Network (PAN) – within a home
Local Area Network (LAN) or Wireless Local Area Network (WLAN) – network or wireless network within a small area such as a building or group of buildings
Wide Area Network (WAN) – large network that contains multiple smaller networks
physical structure includes: interface cards, cables, switches, routers, and serversSlide4
PERSONAL AREA NETWORK (PAN)Slide5
Local area network (lan)Slide6
WIDE AREA NETWORK (WAN)Slide7
Internet & world wide web
INTERNET
Inter
connected
net
work of computer networks – global
began in 1969 as a government project
The World Wide Web
invented in 1989 by Tim Berners Lee who wanted to share information with colleagues at CERN (Particle Physics Laboratory) in Switzerland
1990 – established the three fundamental technologies for web:
HTML
: HyperText Markup Language.
URL/URI
: Uniform Resource Locator/ Uniform Resource Identifier
HTTP
: Hypertext Transfer ProtocolSlide8
ACRONYMS & the internet
HTTP
–
H
yper
T
ext
T
ransfer
P
rotocol Allows for the retrieval of linked web resources
HTTPS
–
S
ecure protocol for confidential web resource retrieval
HTML
–
H
yper
T
ext
M
arkup
L
anguage - The markup (formatting) language for the Web
TCP/IP
–
T
ransmission
C
ontrol
P
rotocol /
I
nternet
P
rotocol - suite of protocols that allows multiple networks to communicate
ISP
–
I
nternet
S
ervice
P
rovider – service needed to connect to the Internet
URL
–
U
niform
R
esource
L
ocator – A kind of “address” that is unique and used to identify each resource on the Web.
What’s in a name?
protocol://domain/path/filename
Domain?
subdomain.domain.top
-level domain
www.edinboro.eduSlide9
http://gargasz.info/wp-content/uploads/2009/12/what-is-dns-diagram1.jpgSlide10
Web browsers
software used to access world wide web
common browsers: Chrome, Internet Explorer, Firefox, Safari, Opera, Edge
features of a browser
graphical user interface (GUI)
navigation – address bar, links, navigation buttons, search box
Bookmarks
browsing history
tabbed browsing – allows you to have several sites open – right-clicking on a link produces a shortcut menu that provides options for opening the link
downloading files – to your computer – right-click link for shortcut menu
plug-ins – programs installed in browser that enables it to work with a variety of file types Slide11
Address Bar
Tabbed Browsing
Navigation
Home
Bookmarks
Search BarSlide12
SEARCH ENGINES
specialized websites that help you to find what you are looking for
do this by entering one or more keywords
sample engines: Google, Yahoo!, Bing
there is A LOT of information on the web, so the more specific you can be with your search, the better the chance that you will get to a location that will give you the information you are looking for
to improve searches:
consider taking the suggestions offered by the search engine
search for
phrases
(you do this by placing quotes around the words) – i.e. “basketball hoops” for sale
you can also exclude terms with the minus sign – i.e. recipes for potato –salad
use the word
OR
in the search – i.e. lessons on laptops OR tablets
Google Scholar for research or Google News for latest events
you can perform specialized searches for images, videos, maps, etcSlide13
HOW SEARCH ENGINES WORK
https://www.youtube.com/watch?v=mFGUeVdSQJwSlide14
INTERNET ETHICS
Do NOT harm
Do NOT steal
Do NOT access files without owner’s permission
Do NOT infringe on copyrights (this is probably the BIGGEST problem)
Respect privacy of others
Report illegal communications and activities to ISP or law enforcement
Keep user IDs and passwords secure
Do NOT retrieve, view or modify information of others without permission
Be honest, sensitive and respect the rights of others