This summary is built on for all the information you need to study for your IT theory exam. The layout is in the design of keycards if you want to cut them out and learn it card by card or you can learn as a page as a whole. This summary has all the definitions from the glossaries as well as all th...
HARDWARE
Mobile technologies - Tablet
- Laptop & netbook o Larger version smartphone, run same OS and has same
o Complete comp in case w screen, keyboard, point device, tech w adv of larger screen for > productivity
wifi and bat to power dev when away from fixed power Adv: larger screen, bigger keyboard, long bat life than
source laptop
o Netbook less powerful & cheap Dis: mobile OS can’t run full desktop SW, (same
Adv: powerful CPU, Full OS, expandable smartphone)
Dis: Size, battery life, not always on - E-reader
- Smartphone o Single purpose dev design allow read e-books
o Mobile comp w OS but a large as cellphone, run apps and Adv: cheap tablet/smartphone, lighter, longer battery,
easy read sunlight
sensors built in HW extend to multipurpose dev
Dis: single purpose, can’t see in dim light, extra device carry
Adv: always on, small, long bat life, convergence
Dis: Mobile OS, input difficult, not easy add peripherals
- Advantages of mobility - Constraints on mobile technology
o Always on: always work in background, allow fast o Battery life
intuitive Long operation = bigger battery = bigger dev
o Always connected: can always connect to Internet More powerful dev = greater need elec = bigger
o Powerful: phone/tablet include CPUs almost good as bat
desktop comp
o Convergent: Trend where separate tech & functions from Limited battery life:
mult dev are combined single multi-purpose dev 1. Always need carry chargers
o Mobile: not need to stay 1 place / attached to wired 2. Run out power daily
connections; wearable 3. Lim dev usage to conserve power
4. Trade comp pwr & pwr consumer
o Speed & availability of communication Factors influencing computer’s performance
Poor cell recap.: phone/tablet can’t use calls, 1) CPU
data transfer, browsing ,’, red useful Speed (GHz): bigger better, higher speed = CPU process more instruc
in same time
Cores: single complete working CPU circuit, modern chips multi-core,
o Size contain more 1 core in single CPU
Small & light = easy carry 2) Memory
Bat & comp components use physical space ,’, Bigger better
lim space available ,’, lim space for component & Where comp keeps data & instructions working w
batteries Memory fast
3) Cache
Bigger is better
Use lim faster media for faster access data/instruc store on slower
media
Temporarily store recently accessed data/instruc on faster media
Bigger cache = more data access from faster media
Built into components, cant chng/upgrade w/out replacing
4) Storage 6) Graphics processing ability
Low access time better Graphics card perform relies:
Access speed = average time take read/write data 1. Speed & no. of process cores on GPU chip
Improve comp speed replacing mech hard drive w SSD 2. Speed & amount memory on card
SSDs = expensive & smaller sizes 3. Speed of comm w motherboard
5) Network Better graphics card improve speed when doing graphics-
Higher network speed better intensive tasks
Measured Mbps/Gbps 7) Bus performance
Higher speed = more data transferred same amount time Bigger is better
Affects perform when lot computing work is connect to Transfer data between CPU & other part occurs over various
comp/resrcs over net ‘buses’
Only matter when put together fastest possible computer
- Hardware recommendations - System unit recommendations
o CPU: standard for personal & SOHO, pwr user need best
o Home/personal user: ltd office tasks e-mail, web browsing, social net, o Memory (RAM): more better for any user, pwr user need more
Skype , entertainment (casual gaming, music, movies) o HDD: Entertain user need largest, pwr user need RAID tech
(Redundant Array of Independent Disks" is a data storage
o SOHO (Small Office Home Office) describe smaller busines org & differ virtualization technology)
from large corp, some need workstation for design plans o SSDs: pwr user use as primary drive of comp
o DVD Drive: mainly for backward compatibility
o Entertainment users: music, videos, web browsing, social net, play
o Port: USB port for all users (USB 3 fast), network port for
casual games
connect to net. Firewire/thunderbolt high speed data
o Power users Users who need high-end comp spec for jobs/interests. connections
Need specific SW related to task & use most advance funct of SW
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller zaidenshaik. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $6.53. You're not tied to anything after your purchase.
