taap.digitalnetwork engineering toolkit

Quick answers

Common networking questions with the direct answer, the math and the tool ready to adjust.

Wildcard masks

/16 → 0.0.255.255/17 → 0.0.127.255/18 → 0.0.63.255/19 → 0.0.31.255/20 → 0.0.15.255/21 → 0.0.7.255/22 → 0.0.3.255/23 → 0.0.1.255/24 → 0.0.0.255/25 → 0.0.0.127/26 → 0.0.0.63/27 → 0.0.0.31/28 → 0.0.0.15/29 → 0.0.0.7/30 → 0.0.0.3

IPv6 subnet counts

/64 in a /48/64 in a /56/64 in a /60/64 in a /52/48 in a /32/48 in a /40/48 in a /44/56 in a /48/64 in a /32

Transfer times

100 GB @ 1 Gbps1 TB @ 1 Gbps1 TB @ 10 Gbps10 TB @ 10 Gbps50 GB @ 100 Mbps500 GB @ 1 Gbps4 TB @ 2.5 Gbps1 TB @ 100 Mbps

TCP window / BDP

1 Gbps · 100 ms1 Gbps · 50 ms10 Gbps · 100 ms100 Mbps · 200 ms1 Gbps · 600 ms10 Gbps · 20 ms