Routing
Understanding OSPF Area Types: Stub, NSSA, and Totally Stubby
A visual guide to OSPF area design with practical examples from real networks.
Feb 18, 2026Computer Networking
Talks, podcasts, and writings on networking — from BGP routing to zero-trust, written for engineers who love to understand how things really work.
// podcast
Tracing real-world BGP incidents and what network engineers should learn from them.
A measured look at MPLS vs SD-WAN in 2025, with real deployment scenarios.
Cutting through vendor buzzwords to understand what ZTN actually means in practice.
How wireless network characteristics are challenging our assumptions about TCP.
// blog
Routing
A visual guide to OSPF area design with practical examples from real networks.
Feb 18, 2026Security
Layer 2 vs Layer 3 encryption — tradeoffs, use cases, and performance considerations.
Feb 10, 2026IPv6
NDP does a lot more than ARP. Here's what every network engineer should know.
Jan 29, 2026// about
Packetivity is a home for network engineers, students, and the plain curious. We break down complex networking topics into talks and writing that are honest, detailed, and occasionally funny.
Whether you are studying for your CCNA, designing a data center fabric, or just wondering why your home Wi-Fi is terrible — there is something here for you.