| AND: The result is true only when both A and B are true. |
| A | B | Result |
| 1 | 1 | 1 |
| 1 | 0 | 0 |
| 0 | 1 | 0 |
| 0 | 0 | 0 |
|
| |
| |
| OR: The result is true if A or B are true. |
| A | B | Result |
| 1 | 1 | 1 |
| 1 | 0 | 1 |
| 0 | 1 | 1 |
| 0 | 0 | 0 |
|
| |
| |
| XOR: The result is true if A != B. |
| A | B | Result |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
| 0 | 0 | 0 |
|
| |
| Computing Access-List and Wildcard Pairs |
| |
| Bit Swap: convert from canonical format to non-canonical format. |
| This works pretty great with 4 fingers on each hand, cross and flip. |
| |
| |
| |
| |
| Memorize the bit patterns for contiguous ones and zeroes in an octet: |
| Octet-1 | Octet-2 | Decimal |
| 0000 | 0000 | 0 |
| 0000 | 0001 | 1 |
| 0000 | 0011 | 3 |
| 0000 | 0111 | 7 |
| 0000 | 1111 | 15 |
| 0001 | 1111 | 31 |
| 0011 | 1111 | 63 |
| 0111 | 1111 | 127 |
| 1111 | 1111 | 255 |
| | | |
| 0000 | 0000 | 0 |
| 1000 | 0000 | 128 |
| 1100 | 0000 | 192 |
| 1110 | 0000 | 224 |
| 1111 | 0000 | 240 |
| 1111 | 1000 | 248 |
| 1111 | 1100 | 252 |
| 1111 | 1110 | 254 |
| 1111 | 1111 | 255 |
|
