What is the effect of entering the ip dhcp snooping limit rate 6 configuration command on a switch?
- It displays the IP-to-MAC address associations for switch interfaces.
- It enables port security globally on the switch.
- It dynamically learns the L2 address and copies it to the running configuration.
- It restricts the number of discovery messages, per second, to be received on the interface.
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Answers Explanation & Hints: The effect of entering the “ip dhcp snooping limit rate 6” configuration command on a switch is that it restricts the number of DHCP discovery messages, per second, that can be received on an interface.
This command sets a rate limit on the number of DHCP discovery messages that can be received on an interface, preventing a potential denial-of-service (DoS) attack in which an attacker floods the switch with DHCP requests. In this case, the limit is set to 6 messages per second.
This command does not display the IP-to-MAC address associations for switch interfaces, enable port security globally on the switch, or dynamically learn the L2 address and copy it to the running configuration. These are separate configuration commands with their own functions:
- “show arp” or “show mac-address-table” can be used to display the IP-to-MAC address associations for switch interfaces.
- “switchport port-security” can be used to enable port security on a switch port.
- “mac-address-table” or “static-mac-address” commands can be used to manually configure the L2 address on a switch port.