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Question 27 - JN0-280 discussion

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You are configuring an aggregate route. In this scenario, which two statements are correct? (Choose two.)

A.

Reject will silently drop the traffic.

Answers
A.

Reject will silently drop the traffic.

B.

Discard will silently drop the traffic.

Answers
B.

Discard will silently drop the traffic.

C.

Reject will send an ICMP Destination Unreachable message back to the sender.

Answers
C.

Reject will send an ICMP Destination Unreachable message back to the sender.

D.

Discard will send an ICMP Destination Unreachable message back to the sender.

Answers
D.

Discard will send an ICMP Destination Unreachable message back to the sender.

Suggested answer: B, C

Explanation:

When configuring an aggregate route, you have options for how to handle traffic that matches the route but does not match any more specific route in the routing table. Two actions can be taken: discard and reject.

Step-by-Step Breakdown:

Discard:

The discard option will silently drop packets that match the aggregate route. No notification is sent to the sender, and the packet is simply dropped.

Reject:

The reject option will drop the packet and also send an ICMP Destination Unreachable message back to the sender. This informs the sender that the packet could not be delivered because there is no specific route available.

Juniper

Reference:

Aggregate Routes: The reject and discard next-hop options provide different levels of feedback when packets cannot be routed, and they can be used to control how unreachable destinations are handled.

asked 10/10/2024
George Sanchez
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