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1. Introduction to Network Security
BN1023 – Demo PPT
Demo Network Security

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Network Security
• What is network security?
• How does it protect you?
• How does network security work?

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Network Security
• Network Security is the process of taking physical and
software preventative measures to protect the
underlying networking infrastructure from
unauthorized access, misuse, malfunction,
modification, destruction, or improper disclosure,
thereby creating a secure platform for computers,
users and programs to perform their permitted critical
functions within a secure environment.

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Security Management
• Security management for networks is
different for all kinds of situations. A home or
small office may only require basic security
while large businesses may require high-main
tenance and advanced software and hardware
to prevent malicious attacks from hacking
and spamming

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Network Security Threats
Many network security threats today are spread over the Internet.
The most common include:
• Viruses, worms, and Trojan horses
• Spyware and adware
• Zero-day attacks, also called zero-hour attacks
• Hacker attacks
• Denial of service attacks
• Data interception and theft
• Identity theft

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Types of Attacks
Active : - in which an intruder initiates commands
to disrupt the network's normal operation.
Passive: - when a network intruder intercepts data
traveling through the network

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Network Types
Passive Network Types:-
– Wiretapping
– Port scanner
– Idle scan
Active Network Types:-
Denial-of-service attack
DNS spoofing
Man in the middle
ARP poisoning
Buffer overflow
SQL injection
Phishing

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Questions ???

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