Unlock your academic potential with our comprehensive summary of Exploring IT: Theory! Say goodbye to late-night cramming and hello to stress-free learning. Inside, you'll find expertly summarized content that distills complex topics into easily digestible nuggets of knowledge. Our summaries are yo...
Centralized network – Includes a single server that is responsible for some or all the processing. The
server is used for applications, data storage and utilities.
Decentralized network – Distributes workloads among several machines, instead of relying on a
single central server.
Distributed processing – Computer systems that utilize more than one computer to run a single
application.
E.g. parallel processing in which a single computer uses more than one CPU to execute programs
• Thin Clients – Desktop Terminal that has no hard drive. Used as a PC replacement to provide
a cost-effective way to create a network.
Benefits: Cost, security, manageability and scalability
• Fat Clients – Networked computer where most of the required software is stored locally
with limited dependance on network resources.
Benefits: Allows users to customize and configure computers, efficient processing and load
on central server as well as network traffic is reduced.
• Smart Clients – Store most of their data remotely on the internet but use the processing
power and other resources of the local device.
Benefits: independent of continual network connection and capable of heavy data entry
requirements.
E.g. Google Maps, Google Earth, YouTube
Sharing across a WAN
WAN – Network used to connect computers that span a wide geographical area.
Methods:
Peer-to-peer file sharing – (p2p) Every computer becomes a server, and each computer acts as a
server making communication in a two-way street.
• Seeding: Each computer can share data to others
• Leeching: Downloading without giving anything back
Advantages
• Easy File Sharing: An advanced P2P can share files quickly over a large distance
• Reduced costs: no need to invest in a separate computer for a server
• Adaptability: Extends to include new clients easily
• Reliability: remains functional in the event of central server failure
• High Performance: Improved performance when more clients join in
, Disadvantages
• Easy to make files sharable without notice
• Security Risks when torrenting files
• Malware is rife, placing your system at risk
Bit Torrent –
• BitTorrent is a peer-to-peer protocol for file sharing
• It operates without the need for a central server.
• Large files are split into smaller parts for faster downloads.
• Peers that have the complete file become seeds for others.
• A BitTorrent tracker helps coordinate communication between peers.
• Misconception: BitTorrent itself is not illegal, but often used for copyrighted
material.
• Commonly shared materials include music, videos, movies, games, eBooks, etc.
• FTP is different from BitTorrent, as it's a client-server protocol for file transfer.
Remote Access – The ability to access a computer or device from a remote location.
How it works: with software installed, you can connect to the computer with another device
from anywhere. You now have full control over the remote computer allowing applications
to run and open files.
E.g. TeamViewer
VPN – (Virtual Private Network) connects users to a private internet network using the internet.
E.g. Learner connecting to the school LAN from their home to use the schools printer
VPN’s are used for:
• Protection – invisible to the rest of the internet
• Anonymity – replaces the IP address of the device with the IP address providing the VPN
• Censorship – gives the appearance that the user is in a location they are not
Comparison between VPN and Remote access – pg. 62
Internet of Things (IoT)
IOT - A system of related computing devices, objects and people who are provided with unique
identifiers and the ability to transfer data without the need for human interaction.
SoC - (System on a chip) Devices referred to above
IoT used in day-to-day life:
• Can benefit farmers in agriculture. Sensors can collect data on rain humidity etc.
• Helps to monitor operations surrounding infrastructure. Sensors can be used to monitor
changes in infrastructure.
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 mahdiyyahbayat. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.05. You're not tied to anything after your purchase.
