BTECH 1 - 6

BTECH 1 - 6

1. LESSON 2

   • online advertising - promoting a product, service or brand using the internet
     • search engine results pages
     • Banner / pop-up advertisements
     • email marketing
   • pay-per-click advertising
     • A form of online advertising where websites/pages host ads for other companies
       • a surfer clicks on the ad and are directed to advertisers website
       • website provider gets a payment for every ad that os clicked on
     • uses an affliate model
       • the affliate is the host website e.g. google

2. LESSON 3

   • Information exchanges
     • Web logs
       • frequently updated online journals with diary-like entries. typically has text, photos, videos
     • Microblogging sites
       • allow users to create and exchange short text entries
     • WIkis
       • websites that provide info which visitors can extend and edit.
     • chatrooms
       • online communication within communities is chat. large interactive communities where people take place in same conversations are chatrooms
   • Key Terms
     • newsgroup
       • site where groups of people with common interests can meet & write info
     • conferencing
       • groups of people in different areas meeting online to discuss matters
     • Social networkking
       • sites where you can meet and interact with people all over the world
   • VoIP
     • allows people to interact in real time using voice or video messaging between any 2 points in the world
       • reliability voice quality security
       • low costs, less travel time, no cost of hiring venue

3. LESSON 4

   • Key terms
     • upload
       • moving a file from one system to another
     • download
       • moving files from a system to personal computer
     • algorithm
       • mathematical step-by-step sequence used to work out calculations
     • version control
       • way of tracking changes to documents & making sure you are working on up-to-date version
     • Locked
       • can't open a document when locked. only becomes unlocked when no users accessing document
     • File permissions
       • access rights granted to specific users
       • Read-only
         • user can only look at document
       • Read/write
         • user can read and change document
       • Full controll
         • users can retrieve, read, edit, add new document, archive/ delete existing doucment
   • Zip files
     • files converted to these to compress and expand documents before and after trasnmission
       • Winzip normally used
   • Online Software Packages
     • can allow many people to share/ work on document at same time
     • can access content wherever here is internet access
     • can access content on different operating devices

4. LESSON 5

   • cloud computing
     • using computer services on other organisation's computers (hosts)
   • cloud storage
     • Cost and convenience
       • only pay for storage you've used, don't have to provide and maintain hardware
     • availability
       • available anywhere with internet connection
     • reliability of network
       • need to be able to get through to host
     • security of data
       • files stored by host - no control over them
     • software
       • host may not be using latest most up to date version
     • lower performance
       • speed of retrieval of data may be slower than if it would be on a local database
   • ubiquitous
     • existing everywhere
     • computer systems - connecting devices to the internet so data is generated by processors is readily availible
   • RFID- radio frequency identification
     • uses radiowaves to transfer data to a tag on a person/object so they can be identified and tracked
     • tags contain info that is stored electronically and can be transmitted

5. LESSON 6

   • Key terms
     • Point of Presence
       • access point to internet. location which contains all hardware which allows users to access internet.
     • Network Access Point
       • interchange between networks within internet. allows ISPs to interconnect
     • Internet Protocol
       • protocol used to route packets of info across internet
     • Transmission Control Protocol
       • protocol which takes data from users application program and passes it onto IP for transfer across internet. TCP reassembles and forwards data to user's aapplication program.
     • File Transfer Protocol
       • protocol which allows files to be transferred between 2 computers on TCP-based network. used to download programs to computer from servers & upload web pages which you've created to server that hhosts them.
     • Internet Service Provider
       • companies which provide cost effective gateway for people & organisations to get onto internet e.g. virgin, BT
   • connection to internet
     • wireless
       • not fixed to stationary computer, can be used wherever accessible wireless hub availible
       • need access to wireless hub, less secure with wireless connections, slower transmission speeds than wired broadband
     • broadband
       • better reception and faster than dial-up
       • needs base which is wired in
     • dial-up
       • can use existing telephone circuits
       • older technology gives poor reception, can be errors, slower

6. LESSON 1

   • communication
     • email, messaging, newsgroups, social networking, conferencing, blogs/ vlogs
   • Real-time Info.
     • timetables, news, sports updates, weather reports, travel news
   • commerce
     • banking, auctions, online sales/ purchasing, poublishing
   • government
     • tax returns, e-voting, applications for grants/ benefits
   • education
     • online learning/ training
   • buisness
     • business networks, collaborative working
   • entertainment
     • multi-user games, radio & tv players
   • download services
     • music, films, new software

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