What is a firewall?
Software or hardware which filters information between the user’s computer and an external network
What tasks are carried out by a firewall?
- Log all data traffic
- Block Ip addresses and incoming data that doesnt match criteria
How can firewalls be worked around?
Employee misconduct
Firewall can be disabled
How does SSL work?
The web server sends its SSL certificate to be authenticated by the web browser to decided whether a secure two way connection can be established
What is TLS?
Transport Layer Security is a more effective SSL
What are the two layers of TLS?
Record and handshake protocol
What is the TLS record protocol?
contains the data being transferred over the Internet
What is the TLS handshake protocol?
- permits the website and the user to authenticate each other
What are the differences between TSL and SSL?
- TLS can have new authentication methods
- TLS separates the handshake and record protocol
What is a message called before encryption?
plain text
What is a message called after encryption
Cypher script
What is a cache?
Processed data kept on hand and reused to avoid costly repeated database queries
How are emails made more secure?
Sent with a digital certificate so the receiver can verify it
What are normal backups?
All files are backed up and a archive bit is reset
What are copy backups?
All files are backed up, but the archive bit isnt reset
What are daily backups?
Only backs up filed modified that day
What are incremental backups?
Only backs up files modified since your last backup
What routine fixes dampen the computer slowing down?
- Archiving old files
- deleting temporary files
