SI110 Homework
Alpha: ________ Name: ____________________ Page 1 of 2
Collaboration Policy: Default
choose one: □ None □ XS110 □ EI with:
(or more)
□ MGSP
□ Discussed with: ____________________________
Homework:
/SI110/Cyber Battlefield/Digital Data
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1. [ 10 / 8 / 5 / 0 ] What decimal number does the 8-bit pattern 0101 1111 (spaced for
readability) represent?
2. [ 10 / 8 / 5 / 0 ] What 8-bit pattern represents the decimal number 191?
3. [ 10 / 8 / 5 / 0] Exactly how many bits are in a 6 KB (KiloByte) file?
4. [ 10 / 8 / 5 / 0 ] How many bytes are needed for an ASCII text file containing only these
characters: Cats & Dogs
5. [ 10 / 8 / 5 / 0 ] What ASCII characters are represented by the Hex values: 59 4f 4c 30
6. A file consists of the below 3 bytes represented in binary (spaced for readability):
0100 1001
0101 0111
0110 0111
a. [ 5 / 3 / 2 / 0 ] What is exactly displayed if the file is opened in Notepad?
b. [ 5 / 3 / 2 / 0 ] What would exactly be displayed if the file is opened in frhed?
Main View Portion
Right View Portion
c. [ 5 / 3 / 2 / 0 ] What would happen if you tried to open the file with Windows Photo
Viewer? Use complete sentences, spelling and grammar count.
7. Download the file:
SI110 Homework
Collaboration Policy: Default
Page
2 of 2
http://rona.academy.usna.edu/~si110/lec/dataFiles/hw/tiger.zip
a. [ 5 / 3 / 2 / 0 ] The file extension leads you to believe it is what type of file?
b. [ 5 / 3 / 2 / 0 ] What type of file is it really?
c. [ 5 / 3 / 2 / 0 ] Explain how you determined your answer to b? Use complete sentences,
spelling and grammar count.
8. WEP (Wired Equivalent Privacy) is a scheme for securing wireless networks. To connect to a
network using WEP you have to enter a key, where the key is really a number written in hex.
Suppose your friend wrote down his wireless network's WEP key for you, and there's a character
in the key that might be the number 0 or the letter O.
a. [ 10 / 8 / 5 / 0 ] Is the character the number 0 or the letter O?
b. [ 10 / 8 / 5 / 0 ] Explain your answer to a. Use complete sentences, spelling and grammar
count.