Field Notes / Category

Networking

Practical Networking notes, commands and concise references from the sam0x.me technical library.

Networking

Cisco: IPv4, subnetting, VLSM and IPv6

Practical IP addressing notes: calculate IPv4 subnets, build a VLSM plan and configure a dual-stack Cisco router with working host examples.

CiscoIPv4Subnetting

9 min→

Networking

Cisco: practical router and switch setup

A practical first setup for Cisco routers and switches: console access, IP interfaces, switch management, SSH, verification and configuration backups.

CiscoIOSRouters

9 min→

Networking

Cisco: static routes, default routes and RIPv2

Build a three-router lab with static and default routes, replace them with RIPv2, and test a floating static backup path.

CiscoRoutingStatic Routes

11 min→

Networking

Cisco: switching, VLANs, trunks and inter-VLAN routing

Practical Cisco switching labs: access VLANs, 802.1Q trunks, router-on-a-stick, Layer 3 switching, Rapid PVST+ and LACP EtherChannel.

CiscoVLANTrunk

12 min→

Networking

ss — ports, sockets and connections

Practical ss reference for identifying listening ports, active connections, processes, TCP/UDP sockets and network states.

LinuxssNetworking

10 min→