Which address class specifies an initial octet value spanning from 128 to 191 under traditional classful IP routing protocols? MCQ with Answer and Explanation

Question

Which address class specifies an initial octet value spanning from 128 to 191 under traditional classful IP routing protocols?

A. Class A

B. Class B

C. Class C

D. Class D

Answer: Option B

Solution (By JKSSB Mock Tests)

Class B IP addresses feature a first octet ranging from 128 to 191, typically mapped to medium-sized corporate networks.

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Question #1

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What specific task is performed by the Address Resolution Protocol (ARP) within a local area network segment?

A. It routes data packets across separate internet gateways.

B. It translates web domain names into IP paths.

C. It maps a known logical IP address to a physical hardware MAC address.

D. It automatically assigns dynamic IP configurations to client devices.

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Correct Answer: Option C

Explanation:
ARP maps logical IP network targets to their physical MAC hardware addresses within a local data link layer segment.

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Question #2

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Which IP address range specifies a Class C network identity under traditional classful routing protocols?

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

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Correct Answer: Option D

Explanation:
Class C IP addresses use a first octet range from 192 to 223, commonly allocated for small-to-medium local networks.

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Question #3

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Which of the following is a dynamic routing protocol?

A. Static routing

B. OSPF

C. Routing table

D. Default routing

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Correct Answer: Option B

Explanation:
OSPF (Open Shortest Path First) is a dynamic routing protocol that automatically adapts to network changes.

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