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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Tanesha

2 months ago

Switches are like the traffic cops of the network, directing those MAC address frames to their proper destinations!

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Nida

22 days ago

C) The MAC address identifies the physical hardware.

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Louis

1 months ago

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

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Jesusita

2 months ago

Hmm, I'm not sure about D. Doesn't the switch just look at the destination MAC and forward accordingly?

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Beatriz

2 months ago

I think A and D are the right answers. Switches use the MAC address table to forward frames to the correct destination.

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Brandon

2 months ago

B is wrong. The source and destination MAC addresses can change at each hop in the network.

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Crista

1 months ago

C) The MAC address identifies the physical hardware.

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Eden

1 months ago

C) The MAC address identifies the physical hardware.

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Merissa

1 months ago

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

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Marshall

2 months ago

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

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Arlyne

2 months ago

I'm not sure about statement B, though. The source and destination MAC addresses can change as the frame is forwarded, right?

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Beata

2 months 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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