This document discusses network security basics. It covers networking threats like hackers and social engineering. Methods of attack include viruses, worms, and Trojan horses. The importance of security policies, keeping software updated, using antivirus software and firewalls are explained. Firewalls can use techniques like packet filtering, application filtering and stateful packet inspection to control network access and detect attacks. Finally, the document thanks the reader for their attention and welcomes questions.

1. UNIVERSITY OF ABOMEY-CALAVI
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ABOMEY-CALAVI POLYTECHNIC
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COMPUTER SCIENCE AND TELECOMMUNICATIONS
DEPARTEMENT
OPTION: NETWORKS AND TELECOMMUNICATIONS 5
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Discipline: ENGLISH
Network Basic Security
Presented by: Under the baton of:
RADJI Mohamed Mr Bienvenu OLORY
RADJI Mohamed
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2. Outline
INTRODUCTION
1. NETWORKING THREATS
2. METHODS OF ATTACK
3. SECURITY POLICY
4. USING FIREWALLS
CONCLUSION
Network Basic Security RADJI Mohamed
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3. INTRODUCTION
1. NETWORKING
THREATS
2. METHODS OF
ATTACK
INTRODUCTION
3. SECURITY POLICY
4. USING FIREWALLS
CONCLUSION
Network Basic Security RADJI Mohamed
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4. NETWORKING THREATS (1)
INTRODUCTION
 Hackers are intruders who gain access to a
network through the carelessness of network
1. NETWORKING
THREATS
users.
 Attacks can come from both internal and
external sources. Internal attacks account for
2. METHODS OF
ATTACK 70% of security incidents.
 Social engineering is a group of techniques
used to deceive internal users into performing
3. SECURITY POLICY
specific actions or revealing confidential
information.
4. USING FIREWALLS
 Three types of social engineering attacks are:
pretexting, phishing and vishing.
CONCLUSION
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5. NETWORKING THREATS (2)
INTRODUCTION
1. NETWORKING
THREATS
2. METHODS OF
ATTACK
3. SECURITY POLICY
4. USING FIREWALLS
CONCLUSION
Network Basic Security RADJI Mohamed
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6. METHODS OF ATTACK
INTRODUCTION
 Viruses are programs that once activated
1. NETWORKING
spread by modifying other programs or files,
THREATS causing damage to files, or erasing them
completely.
2. METHODS OF  A worm is similar to a virus except it runs
ATTACK
independently and spreads by resending itself
an e-mail attachement or part of a network
3. SECURITY POLICY
message.
 A Trojan horse is a program that appears
legitimate. Once initiated, it can damage a
4. USING FIREWALLS hard drive or create a back door into a system
allowing hackers to gain access.
CONCLUSION
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7. SECURITY POLICY (1)
INTRODUCTION
 A security policy should include identification
1. NETWORKING
and authentication policies, password policies,
THREATS acceptable use policies, remote access policies,
and incident handling procedures.
2. METHODS OF
ATTACK
 All users of network must support and follow
the security policy in order for it to be effective.
3. SECURITY POLICY
 Keep software applications up-to-date with the
latest security patches and updates to help deter
threats.
4. USING FIREWALLS
CONCLUSION
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8. SECURITY POLICY (2)
INTRODUCTION
 Antivirus software, installed on every computer,
1. NETWORKING
THREATS
detects and removes known viruses, worms and
Trojan horses.
2. METHODS OF  Anti-spam software identifies spam and places it
ATTACK
into a junk folder or deletes it.
 Tools and applications used in securing a
3. SECURITY POLICY
network include: Software patches and updates –
Virus protection – Spyware protection – Spam
4. USING FIREWALLS blockers – Pop-up blockers – Firewalls.
CONCLUSION
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9. USING FIREWALLS (1)
INTRODUCTION
1. NETWORKING
THREATS
2. METHODS OF
ATTACK  Packet Filtering –controls access based on IP or
MAC addresses.
3. SECURITY POLICY
 Application/web Site Filtering controls access
based on the application.
 Statefull Packet Inspection (ISP) ensures
4. USING FIREWALLS
incoming packets are legitimate responses to
requests from internal hosts. SPI can recognize
CONCLUSION and filter out attacks such as DoS.
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10. USING FIREWALLS (2)
INTRODUCTION
1. NETWORKING
 A DMZ is an area of the network that is
THREATS accessible to both internal and external users.
 If the wireless access point is unsecured, anyone
2. METHODS OF
ATTACK who connects to it is considered part of the
internal network and is on the protected side of
3. SECURITY POLICY
the firewall.
4. USING FIREWALLS
CONCLUSION
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11. INTRODUCTION
1. NETWORKING
THREATS
2. METHODS OF
ATTACK CONCLUSION
3. SECURITY POLICY
4. USING FIREWALLS
CONCLUSION
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12. INTRODUCTION
THANK YOU FOR YOUR KIND
1. NETWORKING
THREATS ATTENTION.
2. METHODS OF
ATTACK
3. SECURITY POLICY YOUR QUESTIONS AND
SUGGESTIONS ARE WELCOME.
4. USING FIREWALLS
CONCLUSION
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