NETWORK
SECURITY AND NETWORK PRIVACY
A network is set of devices or nodes by communication
links. A network must be able to meet certain number of
criteria and one of them is security.
Network security issues including protecting data from
unauthorised access, there are enemies to the data and also
to the data which is transmitted through network and the
most common enemies are hackers,unaware staff, snoops,
viruses, Trojan horse program, vandals.
Hackers are computer enthusiast who takes pleasure in
gaining access to other people''s computersor network.
unaware staff are employees who focus on their specific job
duties often overlook standard n\w security rules Employees
Known as" snoops " gaining unauthorised access to confidential
data to provide competitors with otherwise inaccessible
information . what can these enemies do ?
Viruses are computer programs that are written by unauthorised
programmers and are designed to replicate themselves and infect
computers when triggered by a specific event.
Some viruses are more destructive and cause such problems as
deleting files from a hard drive or slowing down a system.
Trojan horse programs are actually enemies in disguise Trojans
can delete data and open up computers to additional attacks.
Innumerable types of networks attacks have been documented
and they are dos attacks, access attacks.
ACCESS ATTACKS are conducted to exploit vulnerabilities.
Prevent access to part or all of a computer system.Social
engineering is the increasingly prevalent act of obtaining
network security information thru non - technical means.
Spasm is the most commonly used term for unsolicited electronic
mail or the action of broadcasting unsolicited advertising
messages via e - mail.
Spam is usually harmless but it can be a nuisance,taking up the
recipient'time and storage space.
Organisations have extensive choice of technologies, ranging
from anti - virus software packages to dedicated network security
hardware,such as firewalls and intrusion detection systems , to
provide protection for all areas of the network.
Anti virus software is a virus protection software is packaged
with most computers and can counter most virus threats if the
software is regularly updated And correctly maintained security
policies or rules that are electronically programmed and stored
within security equipment to control such areas access.