Cisco Modeling Labs CML 2.8 is Now Free
Cisco Modeling Labs 2.8 is now free, with a tier that lets you run routers, switches, and firewalls on your laptop. Here is what it unlocks for lab work and certs.
Jaime
Latest posts — page 58
Exploring Cisco Modeling Labs (CML) 2.8: What’s New in This Exciting Release
CML 2.8 brings a free tier, new images, and updated tooling for network simulation. Here is what is new, who benefits, and how to get the most out of the release.
Understanding Collision Domains
A collision domain is any segment where two devices can step on each other's frames. Here is what shrinks them, why switches help, and how it affects performance.
Cisco ASA Cheat Sheet: Essential Commands for Network Administrators
A working Cisco ASA cheat sheet: show version, write memory, failover, ACLs, NAT, and the troubleshooting commands you actually reach for under pressure.
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What is OSPF? A Complete Guide to Open Shortest Path First Protocol
OSPF is a link-state routing protocol that builds an LSDB, runs Dijkstra, and converges fast. Here is what problem it solves, how it works, and where it fits.
Local Area Network Basics: Understanding Modern LANs
Modern LANs run on high-speed switches, PoE, structured cabling, and Wi-Fi 6/7 APs. Here is a clean walkthrough of the components and how they fit together.
Understanding IPv4: The Internet’s Original Addressing System
IPv4 gives every networked device a 32-bit address split across classes and subnets. Here is how IPv4 addressing works, why it still runs the internet, and its limits.
7 Essential OSI Model Layers: Complete Guide for Network Beginners
The OSI model's seven layers explain how data moves from application to wire. Here is each layer, the key protocols, and how to use the model for troubleshooting.
Straight-Through vs Crossover Ethernet Cables: A Clear Guide
Straight-through cables connect PC to switch or router; crossover cables connect like to like. Here is the pinout, color code, and when Auto-MDIX makes it moot.
Understanding IP Routing: A Beginner’s Guide
IP routing is how routers pick a path and forward packets between networks. Here is the routing table, next hop, and longest-prefix match in simple terms.
How to Enable SSH on Cisco Routers and Switches
Enabling SSH on a Cisco router or switch takes a hostname, domain name, RSA keys, a local user, and vty line login. Here is the full config plus verification.
Essential Cisco Commands: 50 Proven Commands
Fifty Cisco IOS commands every network admin and CCNA candidate should have in muscle memory, grouped by config, interface, routing, security, and troubleshooting.