lesson 1: WWW, internet, info privacy Flashcards
what is the internet
interconnected networks-not the same as www
when a comp is turned off, do application systems have the ability to store info. What can?
no bc they are terminated
it is the storage device that can store info (hard disk). this is why we save our files.
what does web server down mean
means a software application/system is not working
most used web servers
apache. http, litespeed, openresty
what is www
one of the many services the internet provides. provides acess to internet info/resources such as videos
what is http protocol
a request response stateless protocol that doesnt remeber user info. there will be no response if there is no request
url
uniform resource locator
what are 1998 cookies
a text file max 4k bytes
what server is the internet based on
client server architecture which has no built in security measures
which layers does the web server deal w
application
presentation
session
(do not provide security)
why is www based on n-tier architetecure
bc secruity reasons that affect the web server not j the web user
tier 1-presentation tier
-consists of web browser and http part of the web browser
-responsible for collecting the request from the user and fowarding the request to the web server
tier 2 application tier
contains server-side scrips which are exectued to process data and send the info to tier 1
aso handles identity autenication
tier 3 data tier
retrieve data and send it to tier 2 for processing
internet applications
email, www, text messaging
what is proxy server
middle man btw users device and internet
-filters bad websites
-provides better security
-control access to certain webs
-saving badnwith by caching files
what is the internt fill definition
global system of interconnected networks that uses the internet protocol suite to communicate btw networks and devices
internet protocols
set of communication protocol used in the internet and similar computer networks
TCP and IP
how does internet transfer data
through store and foward process
When data moves btw networks on the Internet, each one checks if it’s the destination.
If not, it passes the data to the next network, ensuring the data stays safe and intact through a “Store and Forward” process.
fundamental requirement of a communication system
data integrity
the receiver must receive the exact dara that was sent by the sender
why is the internet not secure
many networks involved in delivering data and every network involved has acess to your data
information privacy
relationship between the collection and disemination of data, technology, the public exeption of privacy, and political issues
what are cookies
enable web servers to store stateful info such as items in cart or track browsing activity or saved info. it is a text file stored on users hard disk
first party cookie
-http cookie created by the targeted website
-max 4k bytes
session cookie
removed when the web browser closes
permanenet cookie
stays on the users hard disk for 90 days
third party cookie
created by pop ups
configuration cookies web beacon
transparent image that resides inside web pag or email to track user behavior
flash cookie
-sent by web server to web browser
-created by adobe and must be removed that way too
-can be used to attach virus
evercookie
permentat cookie by javascript
what are cookies used for and definition
session management: lets wb recogbnize users and recall login info and preferences
personalization: customized ads personalize sessions and build targeted ads
tracking: shop use cookies to track user perviiously veiwed items allowing them to suggest other thingd they may like
