130.34.12.64/26 是Class B 預設遮罩為255.255.0.0=11111111.11111111.000000000.00000000, 切四個子網路 2^2 = 4 11111111.11111111.111100000.00000000, 要如何算出28
This entry passed through the Full-Text RSS service - if this is your content and you're reading it on someone else's site, please read the FAQ at fivefilters.org/content-only/faq.php#publishers.
You are receiving this email because you subscribed to this feed at blogtrottr.com.