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…
Question
Options
- A10.4.0.1
- B169.254.0.1
- C192.168.17.3
- D254.200.53.5
How the community answered
(18 responses)- A89% (16)
- B6% (1)
- D6% (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.
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