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To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

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Subnet masking

Networking

QuestionAnswer
/9 255.128.0.0
/10 255.192.0.0
/11 255.224.0.0
/12 255.240.0.0
/13 255.248.0.0
/14 255.252.0.0
/15 255.254.0.0
/17 255.255.128.0
/18 255.255.192.0
/19 255.255.224.0
/20 255.255.240.0
/21 255.255.248.0
/22 255.255.252.0
/23 255.255.254.0
/25 255.255.255.128
/26 255.255.255.192
/27 255.255.255.224
/28 255.255.255.240
/29 255.255.255.248
/30 255.255.255.252
/31 255.255.255.254
128 increments of 128
192 increments of 64
224 increments of 32
240 increments of 16
248 increments of 8
252 increments of 4
254 increments of 2
2 ¹ 2
4
8
2⁴ 16
2⁵ 32
2⁶ 64
2⁷ 128
2⁸ 256
2⁹ 512
2¹⁰ 1024
2¹¹ 2048
2¹² 4096
2¹³ 8192
2¹⁴ 16384
2¹⁵ 32768
2¹⁶ 65536
2¹⁷ 131072
2¹⁸ 262144
Created by: 1155127622