I do understand basic port numbers but not all.

While port scaning a website a found these open ports.
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Port 25
Port 21
Port 22
Port 23
Port 26
Port 53
Port 79
Port 80
Port 110
Port 106
Port 119
Port 139
Port 143
Port 513
Port 514
Port 587
Port 990
Port 992
Port 993
Port 995
Port 2401
Port 3306
Port 4111
Port 4996
Port 5150
Port 5190
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1) Help me to understand these ALL ports

2) I want to getin this computer so if any one can help to do so,

that will be fine 4 me.
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Rg