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NETWORK SECURITY
INTRODUCTION TO NETWORK SECURITY
• Concept of Computer Networks
• Importance of Network Security
• Technologies associated with network security
NETWORK SECURITY TOOLS
• Audit/test/assessment tools
 Network Reconnaissance & Network Mapping:
 Passive Vulnerability Assessment:
 Active Penetration Testing & Gaining Access
• Defence/detection tools
 Firewalls (network & personal)
 Antivirus
 Honeypots
THREATS TO NETWORK SECURITY
• Computer and network security address three requirements:
 confidentiality
 integrity
 Availability
• Attacks on Network Security
 Passive attack
 Active attack
METHODS OF NETWORK SECURITY
 Encryption Methods
 Private key encryption - symmetric cryptography
 Public Key encryption - Asymmetric Encryption
 Extensible Authentication Protocol
 Authentication and Access Control Measures
APPLICATION OF NETWORK SECURITY
 Digital Certificates
 Smart Cards
 Kerberos
FIREWALL
• A firewall is simply a group of components that collectively form a barrier between two networks.
• Types:
 Application Gateways
 Packet Filtering
 Hybrid Systems
ADVANTAGES OF NETWORK SECURITY
• Simplified Implementation and Maintenance.
• Extended Reach.
• Increased Worker Mobility.
• Reduced Total Cost of Ownership and Operation.
CONCLUSION
• Evolution of Network security
• Vision
• Technologies implemented in Network security