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I started learning nmap but I ran into a big problem. I was following some youtube tutorials and the command nmap -sT 192.168.8.0/24 took over 27 minutes while I saw that for many it took around 2 seconds. So what is the reason for so slow speed?
What OS are you running? Wired or wireless? Number of hosts within that IP range? Many things can affect the speed of an -sT scan. Old/cheap WiFi adapters for example.
-n
option.-sT
scan. Old/cheap WiFi adapters for example.