Firewalls

  1. Types of Firewalls by Deployment Model
    1. Hardware Firewalls
      1. Network Appliance Characteristics
        1. Dedicated Hardware
          1. Purpose-Built Design
            1. High Performance
            2. Deployment Scenarios
              1. Perimeter Protection
                1. Data Center Security
                  1. Campus Networks
                  2. Performance Considerations
                    1. Throughput Capacity
                      1. Connection Limits
                        1. Latency Impact
                        2. Hardware Acceleration
                          1. ASIC-Based Processing
                            1. Multi-Core Architecture
                              1. Specialized Processors
                              2. Scalability Options
                                1. Clustering
                                  1. Load Balancing
                                    1. Upgrade Paths
                                  2. Software Firewalls
                                    1. Host-Based Firewalls
                                      1. Operating System Integration
                                        1. Local Policy Enforcement
                                          1. Application Control
                                          2. Operating System Firewalls
                                            1. Windows Defender Firewall
                                              1. iptables and netfilter
                                                1. macOS Application Firewall
                                                  1. BSD Packet Filter
                                                  2. Third-Party Software Firewalls
                                                    1. Personal Firewall Software
                                                      1. Enterprise Endpoint Protection
                                                        1. Unified Threat Management
                                                        2. Virtual Firewalls
                                                          1. Hypervisor Integration
                                                            1. Virtual Machine Protection
                                                              1. Software-Defined Networking
                                                              2. Advantages
                                                                1. Cost Effectiveness
                                                                  1. Flexibility
                                                                    1. Easy Deployment
                                                                    2. Limitations
                                                                      1. Resource Sharing
                                                                        1. Host Dependency
                                                                          1. Management Complexity
                                                                        2. Cloud-Based Firewalls
                                                                          1. Firewall as a Service Architecture
                                                                            1. Cloud-Native Design
                                                                              1. Multi-Tenancy Support
                                                                                1. Global Distribution
                                                                                2. Deployment Models
                                                                                  1. Public Cloud
                                                                                    1. Private Cloud
                                                                                      1. Hybrid Cloud
                                                                                      2. Integration with Cloud Services
                                                                                        1. Infrastructure as a Service
                                                                                          1. Platform as a Service
                                                                                            1. Software as a Service
                                                                                            2. Advantages
                                                                                              1. Scalability
                                                                                                1. Reduced Management Overhead
                                                                                                  1. Global Reach
                                                                                                  2. Limitations
                                                                                                    1. Internet Dependency
                                                                                                      1. Latency Considerations
                                                                                                        1. Vendor Lock-In

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                                                                                                    3. Types of Firewalls by Filtering Method

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                                                                                                    5. Firewall Architectures and Network Design