BTec Digital Information Technology Level 2 (GCSE)- exam component Questions With 100% Correct Answers.

Ad hoc Networks - Answer-- type of wireless network - does not depend on cables - provides organisations employees with internet outside the workplace Open Wi-Fi - Answer-- available in public places - provide Wi-Fi access to anyone - may need to register or some require a network key - unsecure Network Key - Answer-- code, provided only to authorised network users Tethering - Answer-- share internet connectivity with a device that doesn't have internet access Personal Hotspot - Answer-- simple to set up using smartphones tethering facility - several devices can be tethered - wireless, via bluetooth or USB cable Benefits of Ad hoc Networks - Answer-- provide access to internet at all times in most locations - simple to set up - allow users to work in places other than workplace - open wifi- users connect to internet without using data - personal Hotspots- provide internet to one more devices Security Issues - Answer-- open Wi-Fi- no encryption- data sent and received not secure so easily intercepted, if encrypted it is normally weak so easily hacked - websites using https are normally secure but emails are sent in plain text so not secure. - Ad hoc networks- secure enough to send emails and use internet, less vulnerable to eavesdropping, secure encryption keys should be usedPerformance Issues - Answer-- tethering or personal hotspots- internet connection is made via mobile data network. If several devices are tethered data transfer will be slow. - Public Wi-Fi- slow if lots of people are using it - Ad hoc Network- limited range- any device using it needs to be close to Wi-Fi transmitters (signal maybe weak, difficult to connect to or lose connection) Network Availability Issues - Answer-- Blackspots- buildings, tunnels, geographic feature- cause areas where network connection is poor or non-existent or block it all together - Mobile Network coverage- high-speed networks are available in most cities but there are other locations where signal doesn't reach. Differences between service providers. - Available Infrastructure- streaming requires large amounts of data sent continuously over the network. This places a strain on network infrastructure - Developing countries- lack money to invest in network and difficulty managing resources to set up advanced network - Rural Areas- high cost to Install is coverage may be poor Uses of cloud storage - Answer-- files, folders stored on remote servers (the cloud) - upload files from any device - access files- can be downloaded from the cloud to the device(s) - give user access to other users so they can access them to Access Rights - Answer-- files stored in the cloud can be shared by employees working in different locations - user who creates file will control access rights- allow others to edit or only have read-only access - employees with access rights may require user name/password Availability - Answer-- cloud storage accessed on any device, 24/7, any location (with internet) - providers may synchronise files so data is available even when user has no internet Synchronisation - Answer-- store copies of files - allows users to open files when internet is not available - when user edits files system software synchronises files in the cloud to all devices ensuring content is the same- Organisations combine use of apps/files on their own systems/employees with apps/files being stored on the cloud. Employees can work flexibly on different devices both in/out workplace. For cloud and traditional systems to work smoothly apps/files need to be synchronised regularly