OSPF vs. Other Routing Protocols: When to Use OSPF
OSPF vs EIGRP, RIP, BGP, and IS-IS: how they differ on convergence, scalability, vendor support, and metric logic, and when OSPF is actually the right choice.
Archive
Latest posts — page 59
OSPF Basics – Introduction to OSPF: How It Works and Why It Matters
OSPF is the link-state protocol that runs most modern enterprise networks. Here is how it works, why it beats distance-vector protocols, and where to use it.
Native VLAN Configuration and Security on Cisco Switches
Master native VLAN configuration on Cisco Catalyst switches, understand VLAN hopping attacks, and implement security best practices to protect your switched network.
Cisco 9800-CL Wireless Controller Setup Made Easy
Skip the Day 0 wizard and configure the Cisco Catalyst 9800CL via CLI, including management interface, trustpoint, AP join, GUI access, and bootstrap commands.
VTP Configuration on Cisco Switches: Versions 1, 2, and 3
VTP automates VLAN propagation across switches—but a single switch with a high revision number can wipe all VLANs from your network. Learn how to configure VTPv3, manage revision numbers, and avoid the most dangerous VLAN mistake.
Configuring VLANs on Cisco Catalyst Switches
Learn how to create VLANs, assign access ports, and verify your VLAN configuration on Cisco Catalyst 9000 series switches using IOS XE 17.x.
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.
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.
Featured
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.