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Networking

Everything tagged Networking.

13videos

Every Confusing Thing About How Antennas Work Explained Slowly (For Sleep)

A slow, complete history of the antenna, from James Clerk Maxwell's four equations in 1865 through Heinrich Hertz's first deliberate transmitter and Guglielmo Marconi's transatlantic gamble, to Karl Jansky and Grote Reber's accidental birth of radio astronomy, the wartime MIT Rad Lab, and the phased arrays and MIMO systems inside a modern 5G phone. Cosmo Explains walks both the people and the physics: why a dipole radiates but a power cord doesn't, why antenna length tracks wavelength, how gain trades against beamwidth, and why reciprocity means every antenna transmits and receives with the identical pattern. It closes on the Deep Space Network hearing Voyager 1 at 10 to the minus 25 watts, GPS beam shaping, and the six-plus antennas packed into a smartphone, landing on four ideas, resonance, superposition, phase, and aperture, that explain everything from a Yagi rooftop antenna to a reconfigurable intelligent surface.

PhysicsScienceNetworkingSep 27, 2026

The Open Source Internet Is Here

Data Slayer gives himself three weeks to bridge Reticulum onto HF amateur radio so a message can skip off the ionosphere hundreds of miles with no tower, satellite, or middleman. He assembles a Hermes Lite 2, tunes antennas with a NanoVNA, decodes FT8 from Bogota 1,600 miles away, and passes his ham license exam. Because amateur rules forbid encryption and Reticulum is built from it, he terminates encryption at a gateway and sends a plain text, call sign identified frame with a published codec, then carries a real message across his office and two miles across town. The deadline hits before the true skywave test, and he ships the honest result.

NetworkingHardwareSecuritySep 20, 2026

Starlink & Amazon Just Killed the Cell Tower

JCristina breaks down the $31.6 billion race to move the cell tower into orbit, triggered by Jeff Bezos paying $11.6 billion for Globalstar and then petitioning the FCC for 5,105 direct to cell satellites. He walks the RF physics of connecting an unmodified phone to space: the 200 milliwatt SAR cap on handsets, why higher frequency carries more data but stops at walls, and how SpaceX is dropping its DTC shell from 550 km to about 340 km to more than double the power arriving at your phone. On the money side he lays out the CapEx trap the big three are in, roughly $32 to $35 billion a year in tower spend plus land leases and trenched fiber, against a reused Falcon 9 and a satellite covering a thousand square miles. His prediction, stated flatly: at least one of AT&T, Verizon or T-Mobile goes bankrupt or gets bought within a year or two.

NetworkingHardwareBusinessAug 6, 2026

Shadow AI: What every network engineer must know

David Bombal interviews Radware North America lead Randy Wood on what AI is actually doing inside enterprises, framed as a 1994 internet moment times a thousand. Wood walks through the five concerns customers voice every week, data, identity, visibility, the threat landscape, and the loss of autonomy, and explains why shadow AI is the new shadow IT. He argues guardrails fail against autonomous agents and Radware instead validates behavioral intent before execution, then ranks DDoS, API, and bot attacks as the top vectors and calls API security a board mandate, since firms that think they run a thousand APIs often have fifteen thousand. He closes with three predictions and advice to young people to make peace with AI without outsourcing their thinking.

SecurityAINetworkingJun 14, 2026

Complete DARK WEB Explained: Crime, Cybersecurity & the Hidden Internet

A 54 minute educational explainer that rebuilds the dark web from the ground up. It separates the three layers of the internet (surface, deep, and dark), traces onion routing and Tor from a US Naval Research Laboratory project to a global underground, and walks through what actually lives there, from SecureDrop journalism to ransomware franchises. It busts the red room and hitman myths, dissects the criminal economy of Bitcoin, Monero, escrow, and exit scams, and reconstructs five landmark cases including Silk Road, WannaCry, Colonial Pipeline, AlphaBay, and the Shadow Brokers. It closes with how defenders monitor the dark web and a practical seven step personal security guide.

SecurityNetworkingCultureJun 5, 2026

Google Maps is unreasonably fast. Let me explain

Veritasium, with the animation channel 2swap, rebuilds the chain of algorithms that lets Google Maps route across a 64 million intersection continent in seconds when brute force would take longer than the age of the universe. It starts with Edsger Dijkstra inventing his shortest path algorithm in 20 minutes over coffee in Amsterdam in 1956, then climbs through breadth first search, Dijkstra's cheapest cost first method, A star with a straight line distance heuristic, bidirectional search, and the manual road hierarchies of 1990s GPS units. The payoff is contraction hierarchies, which rank every intersection by importance using graph cuts and nested dissection, add shortcut edges, and search only upward to hit roughly 200 microseconds on North America, about 35,000 times faster than Dijkstra. The throughline is that every modern routing method still has Dijkstra's 70 year old algorithm at its core.

ScienceDevOpsNetworkingMay 30, 2026

My Dream "home lab"

David Bombal tours Cisco's 20 million dollar AI networking lab to answer the question most AI coverage skips: once you have the GPUs, how do you wire hundreds of thousands of them into one computer. Three Cisco engineers walk through scale up, scale out, and scale across, the new G300 100 terabit and P200 routing switches, why optics are often the most expensive line on the bill, and how a 128 GPU scalable unit plus simulated flows proves designs at much larger scale. The recurring lesson is economic: a 10,000 GPU cluster rents for 175 million dollars a year, so a 5% efficiency loss or one bad cable costs millions. It also settles the InfiniBand versus Ethernet debate (Ethernet wins at scale) and shows security moving off the edge firewall and into the fabric on DPUs and switches.

NetworkingHardwareAIMay 17, 2026

Vibe Hacking: How AI Is Helping Hackers

David Bombal interviews Radware threat researcher Pascal Geenens about the 2026 Global Threat Analysis Report and the argument that novice hackers now wield power once reserved for nation states. The conversation maps four fronts: vibe hacking, where AI acts as a patient tutor and an agentic attack engine with platforms like Xanthorox AI; a DDoS escalation with volumetric attacks up 168 percent and record 30 terabit per second demonstrations; an API and bot front where legacy APIs and account takeover get industrialized by AI voice agents; and the new attack surface AI itself opens. The AI native section covers indirect prompt injection plus Radware's Shadow Leak and Zombie Agent research against ChatGPT, why guardrails are patches not cures, and MCP tool description poisoning. It is authorized security education, and the throughline is that awareness and visibility are the first real defense.

SecurityAINetworkingMar 29, 2026

The Internet, Reinvented.

Data Slayer argues the internet is not cables or towers but routing, and rebuilds it with Reticulum, a cryptography first networking stack that treats every radio as an interchangeable interface. He hand builds an RNode, then bridges a LoRa only device to a Wi-Fi only device through a dual interface node, proving mismatched hardware can share one network. Scaling up, he runs Reticulum over a long range Wi-Fi HaLow IP mesh on two Raspberry Pi Haven nodes with encryption and route based scaling. The finale routes the Department of Defense mapping app ATAK across that homemade network by hijacking its multicast traffic and fragmenting it to a 500 byte MTU. A build log for a parallel network you own instead of rent.

NetworkingHardwareSecurityFeb 22, 2026

Firewall Demo of Red Team vs Blue Team: Hacking Finance Apps with AI Chatbots

David Bombal and a Cisco network security engineer walk through a full red team versus blue team demo on a fictional finance app that has quietly grown a GPT 3.5 Turbo chatbot. The attack story runs end to end: AI Defense red teams the chatbot and finds prompt injection holes, the blue team converts those findings into guardrails, Secure Workload maps the Kubernetes environment and surfaces a rogue Apache test pod, plaintext HTTP between tiers, and an exploitable CVE, and Secure Firewall catches users SSHing into the front end and a zero day hidden in encrypted traffic. The defenses are tied together by the hybrid mesh firewall idea: enforcement embedded everywhere across the fabric rather than one box at the edge. It is authorized security education built on the guest's own lab.

SecurityNetworkingAIFeb 20, 2026

Complete Kasm Deployment Guide - Proxmox, Cloud & More

Jay LaCroix of Learn Linux TV deploys Kasm Workspaces, the self hostable platform that streams apps and full Linux desktops into a browser tab, four different ways. He builds it in a Proxmox VM (the same recipe as bare metal), hand builds it on an Akamai cloud instance, hardens that instance with a real Let's Encrypt certificate, and finishes with a one click DigitalOcean marketplace droplet. The installer is identical everywhere: download the Linux Server tarball, extract, run sudo bash install.sh, and log in as admin@kasm.local. Along the way he covers the standard new server hygiene (non root user, sudo, hostname, updates, reboot) and the certificate swap that turns the self signed warning into a trusted green padlock.

LinuxHomelabDevOpsJun 10, 2025

Nutanix University

Running Kubernetes in Production with NKP | Global Nutanix User Group Webinar

A Global Nutanix User Group webinar making the case that raw Kubernetes is an engine, not a car, and that running containers in production needs the full vehicle around it. Technical Marketing Engineers Nimal Kunnath and Kapil Anandani introduce the Nutanix Kubernetes Platform (NKP) as an opinionated stack of pure upstream Kubernetes plus more than 22 CNCF projects, organized into three jobs: cluster provisioning via Cluster API, day two observability, and Fleet Management. Live demos show a production cluster built in about 20 minutes, troubleshooting a failing payment service through Grafana, Loki, and an AI Navigator chatbot, disaster recovery with NDK and Velero, and a Fleet Management trick where an application follows a label across clusters and clouds automatically. The session closes on multi tenancy for service providers and a question and answer round covering migration limits, optional components, licensing, project admin roles, and global load balancing.

DevOpsNetworkingHardwareDec 11, 2024

TechWorld with Nana

Kubernetes Crash Course for Absolute Beginners [NEW]

Nana Janashia teaches all of Kubernetes in one hour. It starts with what container orchestration is and why microservices made it necessary, walks the cluster architecture of master and worker nodes, then explains every component you use day to day (pods, services, ingress, ConfigMaps, secrets, volumes, deployments, and StatefulSets) by building one example app. The second half is hands on: install Minikube and kubectl, write four YAML files, and deploy a MongoDB database with a Node.js web app reachable in a browser through a NodePort service. A reader finishes able to stand up a real application on Kubernetes.

DevOpsLinuxNetworkingSep 30, 2021