Which IP address range indicates a Class A network identity under traditional routing rules? MCQ with Answer and Explanation

Question
Which IP address range indicates a Class A network identity under traditional routing rules?
A. 1.0.0.0 to 126.255.255.255
B. 224.0.0.0 to 239.255.255.255
C. 128.0.0.0 to 191.255.255.255
D. 192.0.0.0 to 223.255.255.255
Answer: Option A
Solution (By JKSSB Mock Tests)
Class A IP addresses utilize the first octet range from 1 to 126 (excluding 127 which is reserved for loopback diagnostics).
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Practice More Computer Networking Questions

Question #1
What is the range of port numbers for well-known (system) ports in TCP/IP?
A. 1 to 255
B. 1024 to 49151
C. 0 to 1023
D. 49152 to 65535
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Correct Answer: Option C

Explanation:
Well-known ports are 0-1023, registered ports 1024-49151, and dynamic/private ports 49152-65535.
This question belongs to: Computer Computer Networking
Question #2
What default subnet mask is mapped to standard Class A IP network address tracks under traditional classful sorting models?
A. 255.255.0.0
B. 255.0.0.0
C. 255.255.255.255
D. 255.255.255.0
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Correct Answer: Option B

Explanation:
Class A networks allocate the first 8 bits (octet) to the network ID, which corresponds to a default subnet mask of 255.0.0.0.
This question belongs to: Computer Computer Networking
Question #3
Which class of IP address has the first octet ranging from 128 to 191?
A. Class B
B. Class D
C. Class C
D. Class A
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Correct Answer: Option A

Explanation:
Class B addresses have first octet between 128 and 191.
This question belongs to: Computer Computer Networking
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