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A security administrator is trying to prevent incorrect IP addresses from being assigned to clients on the network. Which of the following would MOST likely prevent this and allow the network to continue to operate?
Correct Answer: A
In computer networking, DHCP snooping is a series of techniques applied to improve the security of a DHCP infrastructure. DHCP servers allocate IP addresses to clients on a LAN. DHCP snooping can be configured on LAN switches to exclude rogue DHCP servers and remove malicious or malformed DHCP traffic. In addition, information on hosts which have successfully completed a DHCP transaction is accrued in a database of bindings which may then be used by other security or accounting features. Other features may use DHCP snooping database information to ensure IP integrity on a Layer 2 switched domain. This information enables a network to: Track the physical location of IP addresses when combined with AAA accounting or SNMP. Ensure that hosts only use the IP addresses assigned to them when combined with source-guard a.k.a. source-lockdown Sanitize ARP requests when combined with arp-inspection a.k.a. arp-protect