Chapter Six

1
Chapter Six

• IS Network
• and
• Telecommunications Risks

2
Network Components

• Computers and terminals
• Telecommunications channels physical and
  wireless
• Telecommunications processors
• Routers and switching devices

3
Network Types

• Local versus wide area networks
• Internet, intranet, extranet
• Virtual private networks (VPN)
• Client/server networks

4
Network Configuration Types

• Star-shaped centralized
• Ring decentralized
• Bus - decentralized

5
Network Protocols and Software

• Open Systems Interconnect (OSI) model a
  standard architecture for networking that allows
  different computers to communicate across
  networks
• Network and telecommuncations software network
  OS, networks management software, middleware, web
  browsers, e-mail software

6
IS Network and Telecommunications Risks

• Social Engineering
• Physical Infrastructure Threats the elements,
  natural disasters, power supply, intentional
  human attacks
• Programmed Threats viruses, worms, Trojan
  horses, hoaxes, blended threats
• Denial of Service Attacks
• Software Vulnerabilities

7
IS Network and Telecommunications Security

• Network security administration
• Authentication
• Encryption secret key and public key
• Firewalls packet filtering and stateful
  inspection
• Intrusion Detection Systems
• Penetration Testing war dialing, port scanning,
  sniffers, password crackers

8
Auditing Network Security

• Risk assessment and best practices
• Benchmark tools
• IT audit programs for network security