2.3 Flashcards
antivirus software
locate and delete viruses.
scans each file on the computer and compares it against a database of known viruses
similar features to a viruses in the database are identified and deleted
other roles of antivirus
checking all incoming and outgoing emails and their attachements
checking files as they are downloaded
scanning the hard drive for viruses and deleting them
firewall
manages incoming and outcoming network traffic
each data packet is processes to check whether it should be given access to the network by checking its destination address
unexpected data packets will be filtered out and not accepted
other roles of firewall
blocking access to insecure malicious websites
blocking certain programs from accessing the internet
blocking unexpected unauthorized downloads
preventing specific users on a network to access certain files
defragmentation
this is when file is split into parts and stored in different locations on the hard disk drive
files that are fragmented take longer to load and read because of the distance between fragments of the file
defragmentation software
used to rearrange the file on the hard disk drive so that all parts are together again in order
improves the speed of accessing data on the hard disk drive
compression
compression is to decrease the size of a file
more files can be stored on a storage device if the size has been reduced
compressed files can be sent more quickly across a network
system monitors
checks the resources of a computer and display how much cpu time and memory current applications are using
task managers
allows a user to close processes and applications if they have stopped responding or if one is using too many resources
disk cleaner
disk cleaners scan a hard disk drive and remove unused files
this can free up space
disk scanner
will scan a hard disc drive for any errors and attempt to repair them
backing up data
is a copy of data that can be used if the original data is corrupted or lost
should be made regularly and stored in an alternative location
imaging creates a identical image of a storage device to be stored in a different location