INSC 40803

1
INSC 40803

• Network Security

2
Types of Threats to Networks

• Failures
• Natural disasters
• Equipment failure
• Power outages
• Unauthorized access
• External
• Internal

3
Prevention and Recovery

• Threat Failure
• Increase redundancy
• Backup often
• Threat Unauthorized external access
• Add firewalls
• Use encryption
• Threat Unauthorized internal access
• Use internal audits
• Provide physical security measures

4
General Tips

• Be aware of frequent hacking tricks
• Social engineering
• DoS attacks
• Update your software (patches)
• Use common sense
• Password policies
• Physical security

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INSC 40803

• Network Management

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Terminology

• Network management
• Network manager vs. network administrator
• Network Operations Center (NOC)
• Simple Network Management Protocol (SNMP)

7
Performance Statistics

• Availability
• Downtime
• MTBF
• MTTR MTTDiagnose MTTRespond MTTFix

8
Other NM Issues

• Latency
• Transparency
• Load balancing
• NM Software
• Simulation / traffic analysis (e.g., COMNET)
• Systems management (e.g., HP Openview)

9
General Tips

• Personnel costs and operating costs are always
  much larger than equipment costs over the long
  run.
• Write service level agreements (SLAs) very
  carefully, no matter which side you are on.

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End of Lecture