Cloud computing + URL

“Give benefits of storing data using cloud computing”

• Cloud storage can be free

• No need for separate (high capacity) storage devices // saves storage on existing devices

• Can access from any computer with internet access

• Cloud data services have built-in backup 

• Do not need to install security, could be better security

• Can easily increase capacity

• Multiple people can work on the same document

• Data can be easily shared

“Give drawbacks of storing data using cloud computing”

• Can only access with internet access

• Can’t access if server goes down

• Reliant on someone else for security → could be poorer security

• Reliant on someone else to backup → may not back-up

• Can take long time to upload/download

• Can be more expensive in the long term

• There could be limited to the amount of storage unless paid for

• Compatibility issues

• Issues with company offering cloud services

“Define cloud computing”

• Accessing a service/files/software on a remote server

  • That are typically accessed using an internet connection

“State what is meant by a public cloud”

• Computing services offered by a third party over the public internet

• Public is open to anyone with the appropriate equipment/software/credentials

“State what is meant by a private cloud”

• Computing services offered either over the internet or a private internal network

• Only available to select users (the company) not the general public

• Private is a dedicated system only accessible from the organisation

Still use service provider, just own single server for JUST that company

“Example of an application that can run on public cloud”

• Email

• Spreadsheet

“Drawbacks of storing files on the public cloud”

• Can’t access files without reliable internet access

• Amount of space for no payment may be limited - have to purchase more

• No control over backup or security // dependent on third party for backup

“Why do companies store csc courses on a public cloud”

• Must be available to anyone who wishes to access

• Must be available on the internet

• Company is willing to share infrastructure with other companies

  • More economic for the company

“Benefits of using private cloud instead of public cloud”

• Not reliant on third party

  • Greater control over security/privacy

  • Greater control over backup

• Storage can be tailored to company requirements

“Disadvantages of storing data on public cloud over server on LAN”

• Loss of control in public, not in LAN

  • Data is stored on remote infrastructure

  • Reliance on external agency to complete tasks (backup, security)

• Requires reliable internet connection

  • To ensure access to remote data, more likely with LAN

• Increased recurring costs

  • Cloud provider charges must be paid, LAN only pay once

“Explain how the web browser uses the URL to access the web page”

• Browser checks cache for URL

• Browser parses the URL and splits it into its component parts

• The browser finds the IP address for the domain name by querying a DNS server

• The browser receives the matching IP address from the DNS server

• The browser creates connection with the web server with that IP address

• The browser renders and displays the result

• The IP address is stored in the browser cache for future use