(1. Remote desktop of windows server: PC Remote Desktop-RDP. It's very easy to use, keep the user name and password, but I don't know why the desktop color is wrong after entering. 2. Telnet: JuiceSSH, aTelnet. JuiceSSH has powerful functions, and the connection types include SSH, MOSH, and telnet. Ability to establish groups to keep multiple connections. aTelnet can only be used for telnet connection, the interface is rough and cannot display multiple pages (at least I didn't find a way). However, the user name and password of the connection can be preserved. 3. WiFi signal test: WiFi analyzer can scan all WiFi signal strength, channel, access point list, etc. 4. Network speed test: Needless to say, speedtest measures network speed. 5, ping: network ping is relatively simple, only used for ping, can set the total number of data packets 6, tracert: fing has more functions, can ping\tracert\TCP port scan... I haven't explored it carefully. There is a Chinese version on the Internet, and I accidentally upgraded it to an English version.)
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