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Network and System Security (Hacking: (Hacking is the attempt to gain…
Network and System Security
Hacking:
Hacking is the attempt to gain unauthorised access to a computer system.
It is an increasingly common criminal activity.
It exploits security weaknesses.
There is a need to protect sensitive systems and data from malicious access.
Most security problems are caused by people rather than systems.
Policies against hacking need to be enforced.
Security Policies:
Network policies must reflect a priority to aim to secure businesses and organisations against hacking.
Policies need to be: Simple, well understood by all and updated as necessary.
Malware:
There are many types of malicious software:
Viruses
Worms
Trojan horses
Spyware
Rootkits
Ransomware
Back doors
It is better to prevent malware than to cure it.
Anti-malware software can stop malware before it does any damage.
Browsers should be updated regularly.
Care should be taken when opening foreign email applications.
Packet Sniffing:
Data packets can be intercepted and examined.
Packet Sniffing can be used legitimately to detect attacks.
SQL Injection
Many online servers use SQL to administer their databases.
SQL has a rich set of capabilities so it can be used to extract data and also to do damage.
Penetration testing:
Attempting to gain access to a network by bypassing the usual entry processes can be used legitimately to expose weaknesses.
Firewalls:
Firewalls consist of:
Software or hardware or a combination of the two.
Rules applied to traffic determine whether to allow communication to take place.