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Exam JN0-347 topic 1 question 76 discussion

Actual exam question from Juniper's JN0-347
Question #: 76
Topic #: 1
[All JN0-347 Questions]

Click the Exhibit button. You are notified that clients connected to your EX Series switch are not receiving IP addresses from the DHCP server.
You examine the switch configuration and notice that DHCP snooping has been enabled. In this scenario, what would cause the problem?

  • A. The location information is not being inserted into the DHCP option 82 requests.
  • B. The dynamic ARP inspection feature needs to be enabled on the ge-0/0/0 interface.
  • C. The DHCP relay setting in the forwarding-options hierarchy has not been configured.
  • D. The DHCP server's ge-0/0/0 interface has not been configured as a trusted interface.
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Suggested Answer: B 🗳️
You can configure DHCP snooping, dynamic ARP inspection (DAI), MAC limiting, persistent MAC learning, and MAC move limiting on the access ports of EX
Series switches to protect the switches and the Ethernet LAN against address spoofing and Layer 2 denial-of-service (DoS) attacks.
You can also configure a trusted DHCP server and specific (allowed) MAC addresses for the switch interfaces. Step-by-Step Procedure Configure basic port security on the switch: Etc.
Reference:
http://www.juniper.net/techpubs/en_US/junos11.4/topics/example/port-security-configuring.html
by Clxxcv420 at March 5, 2021, 10:38 a.m.

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Clxxcv420
4 years, 1 month ago
Definetely Answer is D. By default when enabling DHCP snooping, all access port become untrust, and trunk port become trust.
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