Computer science winter mock

• What are the two versions of IP addressing?

  IPv4 and IPv6
• What is unique about each IP address?


  Each IP address is unique to that device on a network
• What is an example of an IPv4 address?


  192.168.1.17
• How does an IP address change when a device joins a different network?


  The IP address changes whenever the device joins a different network
• What is the purpose of encryption in data transmission?


  Encryption scrambles the message to protect it from unauthorized access
• What is the term for non-encrypted data?

  Plaintext
• What are the advantages and disadvantages of wired Ethernet connections?


  Advantages:

  • Reliable connection
  • Typically faster than wireless

  
  

  Disadvantages:

  • Limited mobility
  • Requires physical cables
• What are the advantages and disadvantages of wireless connections?


  Advantages:

  • Portable and flexible
  • Easy to set up

  
  

  Disadvantages:

  • Short range
  • Potential interference
• What is the function of a protocol in networking?


  A protocol defines the rules for data transmission over a network
• What does HTTPS stand for?


  HyperText Transfer Protocol Secure
• What does SMTP stand for?


  Simple Mail Transfer Protocol
• What does FTP stand for?


  File Transfer Protocol
• What does TCP/IP stand for?


  Transmission Control Protocol/Internet Protocol
• What does POP3 stand for?


  Post Office Protocol version 3
• What does IMAP stand for?


  Internet Message Access Protocol
• What is the role of the Network Layer in the OSI model?


  The Network Layer is responsible for data routing and forwarding
• What is the purpose of an access network?


  An access network connects end-user devices to the internet
• How does encryption work in data transmission?


  Data is scrambled before being sent, making it unreadable to unauthorized users
• How does the use of encryption enhance data security during transmission?


  It ensures that only the intended recipient can read the message
• What digits are used in binary numbers?

  0 or 1
• What digits are used in decimal numbers?

  0-9
• What digits are used in hexadecimal numbers?

  0-9, A-F
• How is the binary number 101101₂ converted to decimal?

  By calculating 1*2⁵ + 0*2⁴ + 1*2³ + 1*2² + 0*2¹ + 1*2⁰
• What is the decimal equivalent of the binary number 101101₂?

  45₁₀
• How is the decimal number 45₁₀ converted to binary?

  By summing 32 + 8 + 4 + 1
• What is the binary equivalent of the decimal number 45₁₀?

  101101₂
• How is the hexadecimal number 1A₂₁₆ converted to decimal?

  By calculating 1*16¹ + 10*16⁰
• What is the decimal equivalent of the hexadecimal number 1A₂₁₆?


  26₁₀
• How is the decimal number 26₁₀ converted to hexadecimal?

  By summing 16 + 10
• What is the hexadecimal equivalent of the decimal number 26₁₀?


  1A₁₆
• What is the array representation of the binary number 101101?

  • [1, 0, 1, 1, 0, 1]
  • [45]
• What is the matrix representation of the binary number 101101?

  • 1 0 1 1 0 1
  • 45
• What is the result of adding binary numbers 1 + 1?

  10
• What is the result of adding binary numbers 1 + 1 + 1?


  11
• What is the result of adding binary numbers 1 + 1 + 1 + 1?

  100
• What is the process of adding binary numbers with carrying over?

  • Add digits from right to left
  • Carry over when sum exceeds 1
  • Example:
  • 0 1 1 0 1
  • + 1 0 1 1 1
  • Result: 1 0 0 1 0 0
• What digits are used in hexadecimal numbers?

  • 0-9
  • A-F
• What is an overflow error in binary arithmetic?

  When result exceeds available bits
• What base are hexadecimal numbers represented in?

  Base 16
• How are numbers represented in base 16 compared to base 10?

  They are larger and fixed in space