Making the Business CaseIPv4 Address DesignDetermining How Many IP Addresses Are RequiredUsing Private and Public Addresses and NATHow Routers Use Subnet MasksDetermining the Subnet Mask to UseHierarchical IP Address Design and SummarizationVariable-Length Subnet MasksIPv4 Routing ProtocolsClassifying Routing ProtocolsInterior and Exterior Routing ProtocolsDistance Vector, Link-State, and Hybrid Routing ProtocolsFlat and Hierarchical Routing ProtocolsClassful and Classless Routing ProtocolsMetricsConvergence TimeRoute SummarizationRouting Protocol ComparisonRouting Information Protocol, Versions 1 and 2Interior Gateway Routing ProtocolEnhanced Interior Gateway Routing ProtocolOpen Shortest Path FirstIntegrated Intermediate System-to-Intermediate SystemBorder Gateway Protocol Version 4IPv4 Routing Protocol SelectionChoosing Your Routing ProtocolRedistribution, Filtering, and Administrative DistanceSummaryEndnotes