ExamTopics Logo
Mail Us[email protected]
Menu
Cisco Discussions
exam questions

Exam 300-115 All Questions

View all questions & answers for the 300-115 exam
Go to Exam

Exam 300-115 topic 5 question 340 discussion

Actual exam question from Cisco's 300-115
Question #: 340
Topic #: 5
[All 300-115 Questions]

Which database is used to determine the validity of an ARP packet based on a valid IP-to-MAC address binding?

  • A. DHCP snooping database
  • B. dynamic ARP database
  • C. dynamic routing database
  • D. static ARP database
Show Suggested Answer Hide Answer
Suggested Answer: Explanation 🗳️
Information About Dynamic ARP Inspection
DAI is used to validate ARP requests and responses as follows:
Intercepts all ARP requests and responses on untrusted ports.

Verifies that a packet has a valid IP-to-MAC address binding before updating the ARP cache or forwarding the packet.

Drops invalid ARP packets.

DAI can determine the validity of an ARP packet based on valid IP-to-MAC address bindings stored in a DHCP snooping binding database. This database is built by DHCP snooping when it is enabled on the VLANs and on the device. It may also contain static entries that you have created.
Reference:
http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus1000/hyperv/sw/5_2_1_s_m_1_ 5_2/troubleshooting/configuration/guide/n1000v_troubleshooting/ n1000v_trouble_19dhcp.html
by aadeeb at July 20, 2019, 4:16 p.m.

Comments

Chosen Answer:
This is a voting comment (?). It is better to Upvote an existing comment if you don't have anything to add.
Switch to a voting comment New
Submit Cancel
aadeeb
5 years, 11 months ago
A should be the correct answer.
upvoted 3 times
...
Community vote distribution
A (35%)
C (25%)
B (20%)
Other
Most Voted
A voting comment increases the vote count for the chosen answer by one.

Upvoting a comment with a selected answer will also increase the vote count towards that answer by one. So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.

SaveCancel