Which IP address class has the first octet range of 1 to 126? MCQ with Answer and Explanation

Which IP address class has the first octet range of 1 to 126?
A. Class A
B. Class D
C. Class B
D. Class C
Answer: Option A
Solution (By JKSSB Mock Tests)
Class A addresses range from 1.0.0.0 to 126.255.255.255, with first bit 0.

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Practice More Computer Networking Questions

Question #1
What basic operational weakness is shared by both Bus and Star topologies if their respective central shared medium (backbone line or central switch) fails completely?
A. They require dynamic analog rewiring steps.
B. They experience an instantaneous duplication of MAC addresses.
C. They automatically switch to high-frequency multicast mode.
D. They suffer a single point of failure that can cause total network collapse.

Correct Answer: Option D


Explanation:
If the core backbone cable in a bus topology or the central switch in a star topology fails, the entire connected network collapses.

This question belongs to: Computer Computer Networking
Question #2
Which protocol is used for remote terminal access?
A. FTP
B. HTTP
C. SSH
D. SMTP

Correct Answer: Option C


Explanation:
SSH (Secure Shell) provides secure remote terminal access and command execution.

This question belongs to: Computer Computer Networking
Question #3
Which network device operates at both physical and data link layers?
A. Router
B. Gateway
C. Hub
D. Switch

Correct Answer: Option D


Explanation:
Switches operate at layer 2 (data link) and have physical layer capabilities for receiving/transmitting signals.

This question belongs to: Computer Computer Networking