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220-801 · Question #527

Which of the following is an example of a Class A IP address?

The correct answer is A. 10.4.0.1. IPv4 address classes are determined by the first octet. Class A addresses have a first octet in the range 1–126. The address 10.4.0.1 starts with 10, which falls in the Class A range (and is a reserved private Class A address per RFC 1918). 169.254.0.1 starts with 169 - this is…

Networking

Question

Which of the following is an example of a Class A IP address?

Options

  • A10.4.0.1
  • B169.254.0.1
  • C192.168.17.3
  • D254.200.53.5

How the community answered

(18 responses)
  • A
    89% (16)
  • B
    6% (1)
  • D
    6% (1)

Explanation

IPv4 address classes are determined by the first octet. Class A addresses have a first octet in the range 1–126. The address 10.4.0.1 starts with 10, which falls in the Class A range (and is a reserved private Class A address per RFC 1918). 169.254.0.1 starts with 169 - this is an APIPA link-local address in the Class B range (128–191). 192.168.17.3 starts with 192, which is Class C (192–223) and also a private address. 254.200.53.5 starts with 254, which falls in the Class E range (240–255), reserved for experimental use.

Topics

#Class A IP#IP addressing#IPv4#IP classes

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