Troubleshooting
Cable Modem Keeps Disconnecting? Check the Line, Then the Signal Levels
Why a cable modem keeps losing its connection, how to read its signal levels, how to rule out your own wiring, and what to give your provider.
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Author profile
Alex Morgan
Network Technology Editor, Router Academy
About
Alex Morgan is a network technology editor focused on Wi-Fi, home networking, routers, mesh systems, and practical network troubleshooting. His editorial work centers on translating networking standards, technical specifications, and configuration concepts into clear guidance that helps readers understand how their networks work and make informed technology decisions.
How Router Academy articles are produced
Articles are researched from standards documents, regulator publications, manufacturer documentation and attributed independent testing, and each one lists its sources and change history. Router Academy does not yet test hardware itself, so articles do not describe first-hand testing. Editorial methodology.
Published work
Articles by Alex Morgan
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How-to Gaming
Console Network Settings That Actually Help (PS5, Xbox, Switch)
Which console network settings Sony and Nintendo point to, what the NAT results mean on Switch and Xbox, and when to change PS5 advanced settings.
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Guide Networking
Backup Internet for Working From Home: Failover, Dual-WAN and Hotspots
How to stay online when your home internet drops, from a phone hotspot to a dual-WAN router that fails over automatically, and what failover doesn't do.
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Troubleshooting
Printer Keeps Going Offline? How to Fix the Network Side
Why a Wi-Fi printer can show as offline on Windows or Mac: separate networks from extenders or guest Wi-Fi, restarts, and a changing address, and how to fix each.
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Explainer Routers
Should You Install Custom Router Firmware (Asuswrt-Merlin or OpenWrt)?
What custom router firmware is, how Asuswrt-Merlin and OpenWrt differ, how to check your router is supported, and who should skip it.
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Guide Networking
Can You Use Ethernet With a Fire TV Stick, Chromecast or Roku Stick?
Which Fire TV Stick, Chromecast and Roku models can use wired Ethernet, what Amazon, Google and Roku document for each, and why the exact model matters.
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Troubleshooting
Ethernet Stuck at 100 Mbps Instead of 1 Gbps: How to Fix It
Why a wired connection shows 100 Mbps instead of 1 Gbps, what Intel's guidance says to check, and how to find the weak link one step at a time.
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Explainer Routers
Thread and Matter: What Your Router Has to Do With Them
What Matter and Thread are, what a Thread border router does, which Apple and Google devices act as one, and whether you need a new router for smart-home gear.
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Troubleshooting
Chromecast or AirPlay Not Showing Up? Why Casting Fails on Some Networks
Why your phone may not find a Chromecast, AirPlay TV or speaker: different networks, guest networks and AP isolation, and how to fix it without undoing your setup.
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Comparison Security
Parental Controls: Router, Device or DNS? Where to Set Them Up
Where to set up parental controls: on the child's phone or tablet, on your router, or with a family DNS filter, what each one covers, and how to combine them.
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Comparison Networking
Cat5e vs Cat6 vs Cat6a: Which Ethernet Cable Do You Need?
Which Ethernet cable category your speed and run length need, why Cat6a is advised for 10 Gb/s at 100 m, and why to avoid copper-clad aluminium cable.
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Guide Routers
Router Features Decoded: MU-MIMO, Beamforming and OFDMA
What MU-MIMO, beamforming, OFDMA, target wake time and Wi-Fi 7's multi-RU do, why your devices decide whether they help, and what to do with the settings.
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Explainer Troubleshooting
Router Lights Explained: What Orange, Red and Blinking Mean
What the coloured and blinking lights on NETGEAR Orbi and ASUS ZenWiFi routers mean, why colours differ between makers, and what to do when one says no internet.
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Guide Security
VPN on Your Router: When It's Worth It and When It Isn't
What a VPN on your router does, why it helps smart TVs and consoles that can't run VPN apps, what you need, and when per-device apps are simpler.
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Troubleshooting
Old Devices Won't Connect After a Router Upgrade (WPA3, Wi-Fi 7 and MLO)
New phones join your new router but the printer, smart plug or old laptop won't. Why WPA3 and Wi-Fi 7 settings can lock older devices out, and the fixes in order.
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Comparison Networking
Remote Access to Your Home Network: VPN Server, Tailscale or Port Forwarding?
Three ways to reach your home devices from anywhere: a router VPN server, a mesh VPN like Tailscale, or port forwarding. What each needs and exposes.
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Explainer Wi-Fi
Wi-Fi Channel Width Explained: 20, 40, 80, 160 and 320 MHz
What channel width does, why wider isn't always better, which widths each Wi-Fi generation supports, and the setting to use on 2.4, 5 and 6 GHz.
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Buying guide Routers
Best Routers With a Built-in Thread Border Router
Which Wi-Fi routers double as a Thread border router for Matter and Thread smart-home devices, what that does, and three eero routers that have one built in.
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How-to Networking
How to Add More Ethernet Ports to Your Router
Out of Ethernet ports? How to add more with a network switch: which router port to use, how many ports you gain, and the mistakes to avoid.
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Buying guide Networking
Best PoE Switches for Access Points and Cameras
Four PoE switch picks for powering access points, cameras and outdoor units, sorted by how many devices you power, how much power they need and port speed.
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Buying guide Gaming
Best Routers for Wireless VR (Meta Quest Air Link)
What Meta says Air Link needs from your Wi-Fi, how to set it up, and three routers with a strong 5 GHz radio, lockable settings and a fast port for the PC.
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How-to Wi-Fi
How to Check Which Wi-Fi Your Device Supports (Wi-Fi 6, 6E or 7)
How to tell whether your Windows PC, iPhone, iPad, Mac or Android phone supports Wi-Fi 6, 6E or Wi-Fi 7, and what the answer means for your next router.
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Guide Networking
How to Give a Device a Fixed IP Address (DHCP Reservation)
How to make a printer, NAS, camera or console keep the same local IP address with a DHCP reservation in your router, and why phones can break it.
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Buying guide Mesh Wi-Fi
Best Extenders for eero and Orbi Mesh Systems
The best extender for eero or Orbi is another unit of the same system: which eero to add, which Orbi satellite fits your router, and why other extenders don't.
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Buying guide Routers
Best Routers Without a Subscription or Required App
Which router brands charge yearly for security and filters, which need a phone app, and three routers with every feature included and full setup from a web browser.
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Buying guide Routers
Best Routers for Starlink (and When You Need One)
Start with Starlink's Router 3 and Starlink Mesh. When your own router is worth it, how bypass mode works, and picks for big homes, outbuildings and port forwarding.
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Guide Security
How to Find Your Wi-Fi Password (Windows, Mac, iPhone, Android)
How to see your Wi-Fi password on a Windows PC, iPhone, iPad or Mac, share it from Android, or find it on your router when no device is connected.
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Explainer Mesh Wi-Fi
Can You Mix Mesh Wi-Fi Brands or Add Your Old Router as a Node?
Whether you can mix mesh brands or models, add your old router to a mesh system, or use Wi-Fi EasyMesh, and what to do instead when the answer is no.
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Troubleshooting
Can't Connect to Wi-Fi? Network Missing, Wrong Password or Won't Join
Why a phone, laptop or smart device won't join your Wi-Fi - network missing, password rejected or joining fails - and the fix for each symptom.
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Comparison Routers
DOCSIS 3.1 vs DOCSIS 4.0: Do You Need a New Modem?
What DOCSIS 4.0 changes compared with DOCSIS 3.1, why upload speed is the real difference, and whether you should buy a new cable modem now.
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Troubleshooting Security
Think Your Router Was Hacked? What to Check and What to Do
The signs of a hacked router that FBI and CISA advisories describe, and what to do in order, from checking DNS settings to a reset or replacement.
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How-to Networking
How to Set Up MoCA: Filters, Splitters and Your Cable Modem
How to connect MoCA adapters over your home's coax: the filter, MoCA-rated splitters, where each adapter goes, and fixing a link that won't come up.
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Guide Wi-Fi
How to Get Wi-Fi to a Garage, Outbuilding or Backyard
Ways to get Wi-Fi to a detached garage, workshop, shed or backyard - outdoor mesh units, a cable, MoCA or a point-to-point wireless bridge - and how to choose.
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Buying guide Routers
Best Budget Wi-Fi Routers
Three entry-tier Wi-Fi 7 routers for small and medium homes, defined by specification rather than price, and what you give up compared with pricier models.
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Troubleshooting Networking
Not Getting the Internet Speed You Pay For? Find the Bottleneck
Why a speed test comes in below your plan, how to test fairly, and how to find the bottleneck in the modem, router, ports, cables or provider.
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Troubleshooting Gaming
Packet Loss and Jitter: How to Test and Fix Them
What packet loss and jitter are, how much is too much for games and calls, and how to test with ping to find whether Wi-Fi or your provider is to blame.
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Troubleshooting
Wi-Fi Connected but No Internet: How to Find the Cause
Your device shows a Wi-Fi connection but nothing loads. Two quick tests show whether it's an outage, the modem or router, or the device.
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Troubleshooting Mesh Wi-Fi
Why Your Device Stays on a Weak Mesh Node (Wi-Fi Roaming Explained)
Why phones and laptops cling to a far-away mesh node or router, what 802.11k, v and r do, and the settings and placement that get devices to switch.
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Comparison Routers
Dual-Band vs Tri-Band vs Quad-Band Routers: How Many Do You Need?
What dual-band, tri-band and quad-band mean on a router or mesh box, when the extra radios help, and how many your home and devices actually need.
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Explainer Networking
What Is PoE? Powering Access Points and Outdoor Units Over Ethernet
How Power over Ethernet works, PoE vs PoE+ vs PoE++, what your access point or outdoor unit needs, and when to use a PoE switch or an injector.
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Guide Routers
Should You Rent or Buy Your Modem and Router?
How to decide whether to keep your internet provider's modem and router or buy your own - what it costs, what you gain and lose, and a middle path.
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How-to Routers
How to Reset Your Router: Restart vs Factory Reset
The difference between restarting a router and a factory reset, what a reset erases, what to save first, how long to hold the button, and what to do afterwards.
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Explainer Routers
Router Speed Ratings Explained: What AX3000 and BE9300 Mean
What the letters and number in a router's rating (AX3000, BE9300) mean, why you never see that speed, and how to compare two routers properly.
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How-to Wi-Fi
How to Check Your Wi-Fi Signal Strength (and What the Numbers Mean)
Where to see Wi-Fi signal strength on Windows, Mac and your router's app, what dBm and signal percentages mean, and how to use the numbers to place hardware.
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Buying guide Networking
Best MoCA Adapters: Wired Speed Over Your Coax
Three MoCA 2.5 adapter picks for wired connections over coax, plus which TV and internet services conflict with MoCA and what else you need.
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Buying guide Routers
Best Routers for Parental Controls (Without Surprise Subscriptions)
Three routers picked for parental controls, with what each includes for free, what needs a subscription, and the limits of router-level controls.
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How-to Networking
How to Change Your DNS Server (Router or Device)
Switch your home network to another DNS service such as Cloudflare 1.1.1.1 or Google 8.8.8.8: where the setting is, what to note first, and when it is locked.
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Explainer Networking
How a Home Network Works: IP, DHCP, DNS and NAT
The four jobs your router does behind the scenes, handing out addresses, translating them, finding websites and routing traffic, explained in plain English.
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Explainer Networking
IPv6 at Home: What It Is and Should You Turn It On?
IPv6 gives every device its own address instead of sharing one through NAT. What changes at home, how privacy addresses work, and whether to leave IPv6 on.
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How-to Routers
How to Set Up a New Router
Set up a new router the right way: connect it to the modem in order, run the app or web setup, choose secure settings, and avoid double NAT with a gateway.
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Explainer Wi-Fi
Wi-Fi 8 (802.11bn): What It Changes and Why "Wi-Fi 8" Routers Are Pre-Standard
Wi-Fi 8 focuses on reliability, not peak speed. What 802.11bn aims to improve, where the standard stands, and why routers sold as Wi-Fi 8 now are pre-standard.
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Buying guide Networking
Best 2.5G and 10G Ethernet Adapters for PCs
Three multi-gig Ethernet adapter picks, from a 2.5G USB adapter to 10G over USB-C or PCIe, plus how to check your PC's port and match the router and cable.
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Buying guide Networking
Best Multi-Gig Switches for Home: 2.5G and 10G Picks
Five multi-gig switch picks, from quiet 2.5G models to 10G, plus how to tell whether your router, devices and cabling can use the speed.
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Guide Security
Guest and IoT Networks: Isolating Devices You Don't Trust
Why NIST suggests a separate network for smart home devices, how a guest network keeps visitors off your main network, and how to set one up safely.
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Explainer Wi-Fi
How Wi-Fi Works: Signal, Bands, Channels and Interference
A plain-English guide to how Wi-Fi works: radio in shared bands, why range and walls matter, how channels and generations fit together, and what keeps it secure.
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Explainer Gaming
NAT Types Explained: Open, Moderate and Strict
What your console means by an Open, Moderate or Strict NAT type, why it affects party chat and matchmaking, and the fixes to try, from UPnP to double NAT and CGNAT.
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How-to Networking
Port Forwarding: When You Need It and How to Do It Safely
Port forwarding lets connections from the internet reach one device at home. When you need it, how to set it up, why it fails behind CGNAT, and how to keep it safe.
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How-to Security
How to See Who's on Your Wi-Fi (and Remove Them)
Find the list of connected devices in your router or its app, work out which device is which, and remove anyone who shouldn't be there by changing the password.
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Buying guide Wi-Fi
Best Wi-Fi 7 Adapters for PCs: PCIe and USB Picks
Two Wi-Fi 7 adapter picks for Windows PCs, a PCIe card and a USB adapter, plus the Windows, router and CPU requirements to check before buying.
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Buying guide Routers
Best Wi-Fi Access Points for Home: PoE and Router Options
Three ways to add a wired Wi-Fi access point at home, from a standard-PoE ceiling unit to eero's Wi-Fi 7 PoE 7, with the power and setup details that matter.
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Troubleshooting
Router Keeps Rebooting or Overheating: Causes and Fixes
Why a router restarts on its own, from power supply and heat to firmware and a scheduled auto reboot, and the order to check them in before replacing it.
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How-to Routers
How to Update Your Router Firmware
Keep your router patched: turn on automatic updates or update by hand on ASUS, NETGEAR and TP-Link, and avoid the mistakes that can damage a router.
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Guide Networking
What Internet Speed Do You Need?
Work out the internet speed your home actually needs: add up what you do at the same time, compare with the FCC benchmark, and check your router can keep up.
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Guide Networking
Ethernet, MoCA or Powerline: Getting a Wired Connection Where You Need It
Three ways to wire a room without new Wi-Fi: Ethernet cable, MoCA over TV coax and powerline over electrical wiring. How each works and which to try first.
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Comparison Security
WPA2 vs WPA3: Which Wi-Fi Security Should You Use?
WPA3 stops attackers guessing your Wi-Fi password offline and protects past traffic. When to use WPA3-only, when to use mixed mode, and what WPA2 still does well.
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Buying guide Routers
Best Cable Modems: DOCSIS 3.1 Picks and When a Combo Makes Sense
Four cable modem and combo picks matched to your plan speed, plus what DOCSIS 3.1, mid/high-split and your ISP's approved list mean before you buy.
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Buying guide Wi-Fi
Best Wi-Fi Extenders (and When You Should Buy Mesh Instead)
Two Wi-Fi extender picks for one weak room, plus where to put an extender, why an Ethernet link helps, and when mesh is the better buy.
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How-to Security
How to Change Your Wi-Fi Password
Change your Wi-Fi password in a few minutes: where the setting lives on ASUS, NETGEAR and TP-Link routers, how to pick a strong one, and reconnecting devices.
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How-to Routers
How to Log In to Your Router (Admin Page and App)
How to open your router's settings: find its address, sign in on ASUS, NETGEAR and TP-Link, and what to do when the login page won't load.
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Guide Gaming
How to Reduce Ping and Lag on Your Home Network
Lower ping and fewer lag spikes: play wired, stop other traffic flooding the connection with SQM, check your Wi-Fi, and know which parts of ping you can control.
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Comparison Routers
Router vs Access Point: Which Do You Need?
A router runs your network; an access point only adds Wi-Fi to it. What each does, what switches off in AP mode, and when an access point beats mesh.
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Guide Wi-Fi
Wi-Fi Channels Explained: Which Channel Should You Use?
Why only channels 1, 6 and 11 avoid overlap on 2.4 GHz, what DFS means on 5 GHz, why 6 GHz has room to spare, and when to change your router from Auto.
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Buying guide Mesh Wi-Fi
Best Mesh Wi-Fi Systems (Research-Based Picks)
Three Wi-Fi 7 mesh systems picked against clear criteria: multi-gig ports on every unit, wired backhaul, 6 GHz and US regulatory status. Who each suits.
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Buying guide Routers
Best Routers for Multi-Gig and Fiber Internet (Research-Based Picks)
Which router a 2 Gig, 5 Gig or 8 Gig plan needs: internet-port rules by plan tier, where multi-gig speed actually shows up, and research-based picks for each tier.
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Buying guide Wi-Fi
Best Wi-Fi Extender for Google Fiber (gFiber)
Start with gFiber's included Wi-Fi 7 Mesh Extender. If you run your own router, here's how to match a mesh system to your plan, with two research-based picks.
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Buying guide Routers
Best Wi-Fi Routers (Research-Based Picks)
Four Wi-Fi 7 routers for a typical home, picked against clear criteria: plan speed, 6 GHz, wired ports and US regulatory status. And when to look elsewhere.
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Guide Gaming
Bufferbloat: Why Ping Spikes When Your Network Is Busy, and How to Fix It
If games lag or calls stutter only when someone else is downloading, bufferbloat is the likely cause. How to test for it and fix it with smart queue management.
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Guide Gaming
Do You Need a Gaming Router? What Actually Lowers Lag
Most home lag comes from bufferbloat, Wi-Fi and NAT, not from lacking a gaming router. What lowers lag, in order, and the router features that matter.
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Troubleshooting Networking
Double NAT: How to Tell If You Have It and How to Fix It
Double NAT happens when two routers translate addresses in a row. How to check your router for it, how it differs from carrier-grade NAT, and how to fix it.
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Explainer Routers
The FCC's Foreign-Made Router Rule: What It Means for Buying and Updating Your Router
What the FCC did in 2026 about foreign-produced routers, what it means for the router you own, its security updates and new purchases, and which brands are approved.
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Guide Mesh Wi-Fi
How Many Mesh Nodes Do You Need? A Placement-First Method
There is no reliable square-foot rule for mesh nodes. A placement-first method to find the right number for your home, and what makes it go up or down.
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Buying guide Routers
How to Choose a Wi-Fi Router: A Decision Framework
Choose a Wi-Fi router by what actually limits you: your internet plan and port speed, your devices, your home, ISP equipment, security updates and US rules.
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Explainer Mesh Wi-Fi
Mesh Backhaul Explained: Why It Decides Your Mesh Speed
Mesh backhaul is how your mesh units talk to each other. How shared wireless, dedicated wireless, Ethernet and coax backhaul differ, and how to improve yours.
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Comparison Mesh Wi-Fi
Mesh Wi-Fi vs Router vs Extender: Which Fixes Your Coverage Problem?
A better-placed router, an extender, a mesh system or wired access points: what each does, what each costs you in speed, and which fits your home.
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Comparison Routers
Modem vs Router vs Gateway: What Each Does and What You Need
What a modem, a router and an ISP gateway each do, how cable and fiber setups differ, and how to add your own router without putting two routers in a row.
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Explainer Networking
2.5G, 5G and 10G Ethernet: What You Need for a Multi-Gig Plan
Multi-gig Ethernet explained: which cable each speed needs, why your connection runs at the slowest link, and what to check before paying for a 2 Gig or faster plan.
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Guide Wi-Fi
Where to Put Your Router (and Mesh Points) for Better Wi-Fi
Central, elevated, in the open and away from interference: where to put a router or mesh point, what to keep it away from, and how to check the result.
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How-to Security
How to Secure Your Home Router: A Settings Checklist
The router settings that matter most for security, in order: admin password, WPA3, updates, remote access, WPS, UPnP and guest Wi-Fi, plus two that don't help.
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Troubleshooting
Slow Wi-Fi? Find Out Whether It's Your Device, Wi-Fi, Router or ISP
Three quick tests isolate why your Wi-Fi is slow: one device or all, wired or wireless, near or far. Then the fix for each cause, before you pay for anything.
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Guide Routers
When to Replace Your Router (and When Not To)
The clearest sign it is time: your router no longer gets security updates. Plus the other good reasons to replace one, and the reasons that are not enough.
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Comparison Wi-Fi
Wi-Fi 6 vs Wi-Fi 6E: Does the 6 GHz Band Matter for You?
Wi-Fi 6E is Wi-Fi 6 plus the 6 GHz band. What that adds, what it costs in range, which devices can use it, and when it is worth choosing a 6E router.
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Comparison Wi-Fi
Wi-Fi 6E vs Wi-Fi 7: Is Upgrading Worth It?
Wi-Fi 6E and Wi-Fi 7 both use 6 GHz. What Wi-Fi 7 adds, the conditions its gains depend on, and whether upgrading makes sense for your devices and plan.
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Explainer Wi-Fi
Wi-Fi 7 Explained: MLO, 320 MHz Channels and What Your Devices Actually Support
What Wi-Fi 7 (802.11be) adds, from multi-link operation to 320 MHz channels and 4K QAM, the conditions each needs, and what your router and devices must support.
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Comparison Wi-Fi
2.4 GHz vs 5 GHz vs 6 GHz: Which Wi-Fi Band Should You Use?
How the 2.4 GHz, 5 GHz and 6 GHz Wi-Fi bands differ in range, crowding, channels and device support, and which band each of your devices should use.
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Troubleshooting
Wi-Fi Dead Zones: Diagnose the Cause Before You Buy Anything
Find out why a room has weak Wi-Fi, from router placement and bands to walls, interference and the device itself, and fix the free causes before buying hardware.
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Troubleshooting
Wi-Fi Keeps Disconnecting: A Step-by-Step Diagnosis
Two questions narrow down why Wi-Fi keeps dropping: one device or all, Wi-Fi or internet. Then fixes from power settings and drivers to band steering and radar.
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Explainer Wi-Fi
Wi-Fi Standards Explained: Wi-Fi 4 to Wi-Fi 7, and Where Wi-Fi 8 Stands
What Wi-Fi 4, 5, 6, 6E and 7 mean, which IEEE standard and bands each uses, why the headline speeds are theoretical, and what to check on your devices.
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