Questions and Answers
What is the binary representation of the decimal number 26?
In hexadecimal, how would the binary number 10010101 be represented?
What does the '0x' represent when used in the abbreviation of hexadecimal numbers like '0x5D'?
In IP addresses, what does the network part of the address represent?
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What is the purpose of a subnet mask in networking?
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If an IP address is 192.168.1.25 and the subnet mask is 255.255.255.0, how many bits are used to represent the network?
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What is the binary representation of the decimal number 13?
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How many bits are required to represent the decimal numbers from 0 to 255?
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What is the hexadecimal representation of the binary number 11001101?
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What is the subnet mask used to divide a network into 8 subnets?
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What is the decimal value of the binary number 101101?
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What is the purpose of the ASCII code?
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What is the decimal representation of the binary number 10001100?
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What is the subnet mask for the network address 10.34.23.134/22?
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What is the network address for the IP address 10.34.23.134 and subnet mask 255.255.255.0?
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What is the maximum number of hosts that can be accommodated in a /22 subnet?
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What is the hexadecimal representation of the binary number 11110000?
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What is the broadcast address for the network 10.34.23.0/24?
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Study Notes
Number Systems
- Decimal system uses 10 digits: 0 to 9
- Binary system uses 2 digits: 0 and 1
- Hexadecimal system uses 16 digits: 0 to 9, and A to F
Binary to Decimal Conversion
- 2^0 = 1, 2^1 = 2, 2^2 = 4, 2^3 = 8, ...
- Convert binary to decimal by multiplying each binary digit by its corresponding power of 2
Hexadecimal System
- Abbreviated as "0x" (e.g. hex 5D might be written as "0x5D")
- Used to represent binary numbers in a more readable form
IP Addresses
- 32-bit binary numbers used to identify computers on the Internet
- Consist of a network part and a host part
- Represented in dotted-decimal notation (e.g. 192.168.1.1)
Subnet Masks
- A 32-bit number that identifies how many bits of the IP address are used to identify the network
- Used to determine the network address of a computer
- Example: 255.240.0.0
Web Browsers and Plug-ins
- Web browsers act on behalf of a user to request and display information
- Plug-ins are used to display special file types that standard web browsers cannot display (e.g. Flash, QuickTime)
Binary Presentation of Data
- Computers use electronic switches that are either on or off, corresponding to 1 or 0
- Binary numbers use the principle of place value, just like decimal numbers
ASCII Code
- American Standard Code for Information Interchange
- Used to represent alpha-numeric data in a computer
Bits and Bytes
- Bits are binary digits (0s and 1s)
- Represented by on/off switches or electrical charges, light pulses, or radio waves in a computer
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Description
Test your skills in converting decimal numbers to binary numbers. Practice converting base 10 numbers like 27, 26, and 25 to their binary equivalents. This quiz also covers hexadecimal representation and converting binary numbers to hexadecimal.
