Home • Router Encyclopedia - Page 3

Routers and switches look alike, both plug in network cables, and have completely different roles: routers handle dialing, issue address numbers, send WiFi, while switches only handle splitting. In 2021, my study didn't have enough network ports, so I spent 89 yuan to buy a router. After connecting it, I got an extra layer of network at home and switched to a 50-yuan eight-port switch, which finally settled down. Three questions to determine which one your home lacks—if you buy in the wrong direction, you won't be able to use it....

The desktop had a network cable plugged in, but the taskbar showed a globe icon, and the network settings said "unidentified network." This line of fine text actually has three ways to write it, corresponding to three issues: not getting the address number, probe failure, and configuration file stuck in the public domain. The root of my problem from that time ended up with a network cable crushed by a bookcase....

If the computer pops up with DNS server not responding, but WeChat still sends and receives messages normally, it means the network is connected, and the connection is interrupted by the asking link. Restarting the router and adding ipconfig/flushdns can fix 70-80% of the issues. The remaining three root causes—upstream DNS issues, v6 silent rushing to answer, and hosts being altered—I remotely queued them one by one with my mother-in-law. I've attached a five-step troubleshooting sequence at the end of the article....

WiFi is called SSID, and each transmitter has its own BSSID under the name. A dual-band router has two units, and for each additional Mesh router, two more are added. Learn to check BSSID, determine which device your phone is connected to, whether roaming is switched, and whether the frequency band is truly 5G—all are instantly clear. After Mesh networking, troubleshooting saves half the hassle....

My wife's laptop frequently disconnects from the internet, with a yellow exclamation mark on the taskbar. Right-click the troubleshooting summary and report "Fixed: Default gateway not available," but a few days after fixing, the issue reappears. I ran through the machine from scratch. The root cause was the network card's power management and drivers. After fixing both areas, it didn't happen again for two weeks. The complete inspection sequence and the entry point for each step are all in this article....

After uninstalling accelerators or packet capture tools, the webpage won't open at all, but ping works fine? The tutorial asks you to type netsh winsock reset, which resets the Windows network ticket gate—the Winsock directory—and clears the LSP security checker inserted by software. It manages flushdns and netsh int IP reset on a separate level, from light to heavy, don't swing the wrong hammer, and side effects must be recorded first....

Are broadband and WiFi the same thing? No. Broadband is the pipe the operator brings to your home; WiFi is just the last ten meters of wireless signal inside the house, separated by two boxes: the optical modem and the router. WiFi is maxed out but you can't get online, and the megapixel count doesn't match. If you distinguish these three, everything works....

What exactly is the "4 independent FEMs" mentioned in teardown reviews? FEM is the front-end module of the router's wireless transceiver, containing the power amplifier PA for transmitting and the low-noise amplifier LNA for reception, essentially acting as a speaker and ear for signals. Routers with the same chip have a 70MB difference in barrier walls, and the difference is often just these few small chips. This article breaks them down and explains them clearly....

UPnP is the secret channel where the software itself greets the router to open the port. The PS5 connects as soon as you plug it in, and the download port automatically turns green. This is thanks to three codes: SSDP shouting, taking the manual, and sending commands via SOAP. I break down the message format and parameters line by line, and also calculate how it is connected to port forwarding, DMZ, and the security ledger....

Computers connect to NAS to map network drives, TVs play movies directly from the NAS, printers plugged into NAS for family use, all backed by the SMB protocol. I have sorted through its third-generation version, the past of SMB1 being ruined by WannaCry, and why the 445 port can't get out—all in one go. If you can't connect to NAS sharing, read this article first before you act....