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Which of the following is NOT a valid Class A IP address?

Practice Questions

Q1
Which of the following is NOT a valid Class A IP address?
  1. 10.0.0.1
  2. 127.0.0.1
  3. 192.168.1.1
  4. 100.100.100.100

Questions & Step-by-Step Solutions

Which of the following is NOT a valid Class A IP address?
  • Step 1: Understand what a Class A IP address is. Class A IP addresses range from 1.0.0.0 to 126.255.255.255.
  • Step 2: Identify the IP addresses given in the question. Look for the one that does not fall within the Class A range.
  • Step 3: Check the first number of each IP address. If it is between 1 and 126, it is a Class A address.
  • Step 4: Note that 192.168.1.1 starts with 192, which is outside the Class A range, making it a Class C address.
  • Step 5: Conclude that 192.168.1.1 is NOT a valid Class A IP address.
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