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.
Section
Networking
The concepts underneath every home network — addressing, NAT, ports and wired connections — explained for people who want to understand what their equipment is doing.
Understand
Fix problems
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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.
Topics we cover
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Home networking
How a home network fits together — IP addresses, DHCP, DNS, NAT, switches and cabling.
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Ethernet and cabling
Ethernet cable categories, switches, MoCA and powerline — the wired side of a home network.
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MoCA and coax networking
Ethernet over the coaxial cable already in your walls — MoCA versions, adapters, filters and sharing coax with cable internet or TV.
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Network adapters
Wired network adapters for computers — USB and PCIe cards that add 2.5, 5 or 10 Gbps Ethernet so a PC can use a multi-gig connection.
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NAT and ports
Network address translation, double NAT, bridge mode, port forwarding and NAT type for games.