Скачать с ютуб test or check your cables - layer 1.... в хорошем качестве

test or check your cables - layer 1....

These are one of the few topics that I constantly cover, review, bring up and explain. I've been doing this for over 30 years and still run into layer one issues. This is so easy to avoid. you can do one or all of the following: buy a cable tester or network tool that can test a cable if you have manageable switches, look at the current port status if you have unmanageable switches, look at the port LED's since many of them will display the port speed, and possibly duplex. lastly check the host connected to the switch, like your laptop, access point, etc and see what speed or duplex it reports.