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Question 21 - JN0-351 discussion

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You deployed a new EX Series switch with DHCP snooping enabled and you do not see any entries in the snooping databases for an interface. Which two Juniper configurations for that interface caused this issue? (Choose two.)

A.
The interface is configured as a disabled port.
Answers
A.
The interface is configured as a disabled port.
B.
MAC limiting is enabled on the interface.
Answers
B.
MAC limiting is enabled on the interface.
C.
The interface is configured as a trunk port.
Answers
C.
The interface is configured as a trunk port.
D.
Dynamic ARP inspection is enabled on the interface.
Answers
D.
Dynamic ARP inspection is enabled on the interface.
Suggested answer: A, C

Explanation:

Ais correct because the interface is configured as a disabled port. A disabled port does not forward any traffic, including DHCP packets.Therefore, DHCP snooping cannot learn any MAC addresses or lease information from a disabled port1.

Cis correct because the interface is configured as a trunk port.By default, all trunk ports on the switch are trusted for DHCP snooping2. This means that DHCP snooping does not inspect or filter any DHCP packets received on a trunk port.Therefore, DHCP snooping does not add any entries to the snooping database for a trunk port2.

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asked 18/09/2024
carlos miyares
22 questions
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