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Peter Gerwinski
es
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f35e57d6
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f35e57d6
authored
3 months ago
by
Peter Gerwinski
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Notizen 3.4.2025
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2d692e74
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20250403/es-20250403.txt
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f35e57d6
Übungsaufgabe 5.1, 03.04.2025, 12:42:18
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
(f) 192.168.20.254 zur Basis 256 --> umwandeln nach Hexadezimal
binär = 1 Bit pro Ziffer
hexadezimal = 4 Bits pro Ziffer
zur Basis 256 = 8 Bits pro Ziffer ("Ziffer" = Dezimalzahl von 0 bis 255)
dezimal = Total krumm. Keine glatte Zahl von Bits pro Ziffern. Nicht verwenden.
254 = 0xfe
20 = 0x14
168 = 0xa8
192 = 0xc0
--> 192.168.20.254 zur Basis 256 = 0xc0a814fe
(j) 750_8 & 666_8 = 111 101 000 & 110 110 110 = 110 100 000 = 640_8
T-Shirt: Es gibt 11 Sorten von Menschen:
- solche, die das Binärsystem kennen,
- solche, die es nicht kennen und
- solche, die das Binärsystem kennen, diese Zahl aber trotzdem "elf" aussprechen.
(k) A380
B747
¹----
15AC7
(l) 0xAFFE >> 1 = 1010 1111 1111 1110 >> 1 = 0101 0111 1111 1111 ² = 0x57FF
²: Dies (0 kommt von links) gilt für vorzeichenlose Zahlen.
Bei vorzeichenbehafteten Zahlen kommt von links eine 1,
wenn ganz links bereits eine 1 stand, ansonsten eine 0.
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