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Question 66/79
Which two port security features are dependent on the DHCP snooping database? (Choose two.)
Correct Answer: B,C
Explanation/Reference:
Explanation:
B: Dynamic ARP inspection (DAI) prevents Address Resolution Protocol (ARP) spoofing attacks. ARP requests and replies are compared against entries in the DHCP snooping database, and filtering decisions are made on the basis of the results of those comparisons.
C: IP source guard mitigates the effects of IP address spoofing attacks on the Ethernet LAN. With IP source guard enabled, the source IP address in the packet sent from an untrusted access interface is validated against the SourceDSN MAC address in the DHCP snooping database. The packet is forwarded if the source IP-MAC binding is valid; if the binding is not valid, the packet is discarded. You enable IP source guard on a VLAN. EX Series switches support IPv6 source guard also.
Reference:
http://www.juniper.net/techpubs/en_US/junos13.2/topics/concept/port-security-overview.html
Explanation:
B: Dynamic ARP inspection (DAI) prevents Address Resolution Protocol (ARP) spoofing attacks. ARP requests and replies are compared against entries in the DHCP snooping database, and filtering decisions are made on the basis of the results of those comparisons.
C: IP source guard mitigates the effects of IP address spoofing attacks on the Ethernet LAN. With IP source guard enabled, the source IP address in the packet sent from an untrusted access interface is validated against the SourceDSN MAC address in the DHCP snooping database. The packet is forwarded if the source IP-MAC binding is valid; if the binding is not valid, the packet is discarded. You enable IP source guard on a VLAN. EX Series switches support IPv6 source guard also.
Reference:
http://www.juniper.net/techpubs/en_US/junos13.2/topics/concept/port-security-overview.html
- Question List (79q)
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- Question 11: Click the Exhibit button. (Exhibit) The IS-IS adjacency betw...
- Question 12: Click the Exhibit button. (Exhibit) Referring to the exhibit...
- Question 13: Click the Exhibit button. (Exhibit) You have an existing Vir...
- Question 14: Click to the exhibit button. Referring to the exhibit, which...
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- Question 16: Click the Exhibit button. Referring to the exhibit, what doe...
- Question 17: Click the Exhibit button. (Exhibit) Referring to the exhibit...
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- Question 21: Click the Exhibit button. Referring to the exhibit, what doe...
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- Question 24: Click the Exhibit button. (Exhibit) Referring to the exhibit...
- Question 25: What is considered a requirement for passing traffic through...
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- Question 29: Click the Exhibit button. (Exhibit) Referring to the outputs...
- Question 30: Click the Exhibit button. Referring to the exhibit, you are ...
- Question 31: You notice that there are currently two MAC addresses associ...
- Question 32: Click the Exhibit button. Referring to the exhibit, which st...
- Question 33: Click the Exhibit button. (Exhibit) Referring to the exhibit...
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- Question 39: Which statement about IS-IS adjacencies is true?...
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- Question 42: You are currently defining a new OSPF area. The area must ad...
- Question 43: Which two statements are correct about a Virtual Chassis?...
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- Question 49: Click the Exhibit button. (Exhibit) Referring to the exhibit...
- Question 50: Which two statements describe the BGP Local Preference attri...
- Question 51: Click the Exhibit button. In the exhibit, each IP subnet in ...
- Question 52: Click the Exhibit button. (Exhibit) You are establishing a B...
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- Question 57: Click the Exhibit button. Based on the output shown in the e...
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- Question 64: Click the Exhibit button. (Exhibit) There are dynamically an...
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- Question 66: Which two port security features are dependent on the DHCP s...
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- Question 68: Click the Exhibit button. (Exhibit) What will be two results...
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