Positive bin<->dec
Negative bin<->dec
Hex
Networks
Potpourri
100
A binary number that ends in a 1 will be...
Odd
100
What mathematical criteria must an algorithm for converting negative decimal numbers to binary meet for it to be a good algorithm?
No negative zero, and x + -x == 0
100
Hexadecimal is base ______
16
100
What does it mean for a network to be "scalable"?
It can expand effectively when new computers are added.
100
A caesar cipher is known as symmetric encryption. Public-key encryption is known as ___________ encryption.
Asymmetric! :)
200
Convert 8 to binary
1000
200
Our negative decimal to binary conversion algorithm is known as what?
Two's complement
200
Where is hex used in computer science?
Most commonly to represent colors, but anywhere binary is appropriate!
200
What trait does a fault-tolerant network have?
If one computer on it dies, the network still continues to function.
200
What is ASCII?
A system for converting between integers and characters, for encoding strings (and just about everything else)
300
Convert 1010 to decimal
10
300
Convert -12 to binary
12: 00...1100
flip: 11...0011
add one for final result: 11...0100
300
What range of letters are used in hex, and what decimal values do they represent?
A-F, 10-15
300
The diagram below represents a small network. Is it redundant?
Yes; there are multiple paths between each node on the graph.
300
Take a look at the ASCII table. Which two integers, combined, represent the message "Hi"?
72 105
400
Convert 11111 to decimal
31
400
Convert -1 to binary
positive: 00...01
flip bits: 11...10
add one to get result: 11...11
400
Convert B3 to binary.
10110011
400
Name 2 types of malware and what they do.
Answers vary!
400
What's the difference between encoding and encryption?
Encoding: changing the format of data (to make it easier to send, read, process, whatever)
Encryption: encoding data for the purpose of making it hard to "crack" and read if you're not the intended recipient.
500
Convert 72 to binary
1001000
500
Convert -19 to binary.
Positive 19: 00...10011
Flip: 11...01100
Add one to get result: 11...01101
500
Convert 87 (hex) to binary
10000111
500
What's the main weakness or drawback of using antivirus software, and how can you protect yourself in light of it?
Antivirus software is reactive, not proactive. Protect yourself with VPNs, MFA, not being stupid, rotating passwords, etc etc etc
500
Intercepting and reading a user's packets as they send them to the router is known as what type of attack?
"Monkey in the middle"