What layer of the OSI model does an intelligent network switch use to read hardware MAC addresses and make data forwarding choices? MCQ with Answer and Explanation

Question
What layer of the OSI model does an intelligent network switch use to read hardware MAC addresses and make data forwarding choices?
A. Physical Layer (Layer 1)
B. Application Layer (Layer 7)
C. Network Layer (Layer 3)
D. Data Link Layer (Layer 2)
Answer: Option D
Solution (By JKSSB Mock Tests)
Switches operate at the Data Link Layer (Layer 2), using hardware MAC addresses to forward data frames across local network segments.
This question belongs to: Computer Computer Networking
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Question #1
Which protocol is used to prevent loops in a switched network?
A. STP (Spanning Tree Protocol)
B. OSPF
C. BGP
D. RIP
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Correct Answer: Option A

Explanation:
Spanning Tree Protocol (STP) prevents loops in networks with redundant links.
This question belongs to: Computer Computer Networking
Question #2
What is the purpose of a packet header?
A. Contains error correction codes
B. Contains the actual data payload
C. Contains source and destination addresses and control information
D. Contains routing tables
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Correct Answer: Option C

Explanation:
Packet headers include addressing, protocol, and other metadata for routing and reassembly.
This question belongs to: Computer Computer Networking
Question #3
Which protocol is used to manage multicast group memberships?
A. ICMP
B. IGMP
C. ARP
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Correct Answer: Option B

Explanation:
IGMP (Internet Group Management Protocol) manages multicast group memberships.
This question belongs to: Computer Computer Networking
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