Networking Concepts
This page holds all the pages explaining various networking topics.
Foundation
Section titled “Foundation” Basic Device Configuration Initial setup commands for routers and switches - hostnames, passwords, access control, and system settings.
Swtiching
Section titled “Swtiching” Switch Fundamentals Basic switch port configuration for connecting devices - access ports for endpoints, trunk ports for switch-to-switch connections.
VLANs and Trunking Segment a network into separate broadcast domains using VLANs and carry multiple VLANs between switches with trunking.
Routing
Section titled “Routing” Inter-VLAN Routing Enable communication between different VLANs using a Layer 3 device like a router or multilayer switch.
Static Routing Manually define routes to remote networks for full control over routing paths, ideal for small or stub networks.
OSPF Routing Automatically exchange routes and calculate the best path using cost, ideal for medium to large multi-vendor networks.
EIGRP Routing A Cisco-proprietary routing protocol that offers fast convergence and efficient updates for large-scale networks.
Services
Section titled “Services” DHCP Configuration Automatically assign IP addresses, DNS servers, and default gateways to devices on your network.
NAT Configuration Translate private IP addresses to public IP addresses, allowing internal devices to access the internet.
LLDP Get information about connected devices.
Security
Section titled “Security” Standard ACLs Filter traffic based only on the source IP address for simple and effective access control.
Extended ACLs Filter traffic based on source/destination IP, protocol, and port numbers for granular control over network access.
Troubleshooting
Section titled “Troubleshooting” Network Verification and Testing Check for problems and weaknesses within your network by verifying your configuration.
Documentation
Section titled “Documentation” Network Documentation and Diagramming Get information about interfaces and neighboring devices.