Juniper Exam JN0-105 Topic 2 Question 31 Discussion

Actual exam question for Juniper's JN0-105 exam

Question #: 31
Topic #: 2

Which two statements are correct about MAC addresses? (Choose two.)

ASwitches use the Address Resolution Protocol table to assign MAC addresses to network interface cards in the forwarding frame.

BThe source and destination MAC addresses always remains static to the final destination.

CThe MAC address identifies the physical hardware.

DSwitches use the destination MAC address to identify the next-hop destination and to change the destination MAC address in the frame.

Show Suggested Answer

Suggested Answer: C, D

MAC (Media Access Control) addresses are unique identifiers assigned to network interfaces for communications at the data link layer of a network segment. MAC addresses are used to identify the physical hardware on a network. In the context of Ethernet switches, the destination MAC address in incoming frames is used to determine the appropriate output port for forwarding the frame towards its final destination. The switch does not change the destination MAC address; it uses the MAC address to make forwarding decisions within the local network segment.

by Bernardine at Feb 08, 2025, 12:19 PM

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Beata

3 days ago

I agree with you, Mike. I also believe that statement D is correct because switches use the destination MAC address to identify the next-hop destination.

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Abel

11 days ago

C is definitely correct. MAC addresses are physical layer identifiers that represent the network interface card.

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Mike

12 days ago

I think statement C is correct because MAC addresses do identify the physical hardware.

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