What is the purpose of the ip dhcp snooping command on a switch?

What is the purpose of the ip dhcp snooping command on a switch?

• A. To disable DHCP on the switch
• B. To monitor DHCP traffic only
• C. To enable DHCP snooping globally on a switch
• D. To create a DHCP relay agent

Answer: (C)

The purpose of the ip dhcp snooping command on a switch is to enable DHCP snooping globally on the device. This feature acts as a security mechanism that helps to protect the network from rogue DHCP servers. When enabled, DHCP snooping allows the switch to filter untrusted DHCP messages and only allow trusted messages from authorized DHCP servers, which helps ensure that clients receive valid IP configurations. By using DHCP snooping, network administrators can prevent attacks where an unauthorized server provides malicious IP addresses to clients, which could result in man-in-the-middle attacks or other forms of disruption. DHCP snooping also records a binding table that maps the MAC addresses of devices to their assigned IP addresses, enabling better control and monitoring of IP address allocation within the network. The other options do not accurately reflect the purpose of the command. For instance, disabling DHCP on the switch does not relate to DHCP snooping, as this command specifically enhances DHCP functionality rather than turning it off. Monitoring DHCP traffic alone does not encompass the broader protective measures implemented by DHCP snooping. Similarly, creating a DHCP relay agent involves different configurations and is not the purpose of enabling DHCP snooping.

The purpose of the ip dhcp snooping command on a switch is to enable DHCP snooping globally on the device. This feature acts as a security mechanism that helps to protect the network from rogue DHCP servers. When enabled, DHCP snooping allows the switch to filter untrusted DHCP messages and only allow trusted messages from authorized DHCP servers, which helps ensure that clients receive valid IP configurations.

By using DHCP snooping, network administrators can prevent attacks where an unauthorized server provides malicious IP addresses to clients, which could result in man-in-the-middle attacks or other forms of disruption. DHCP snooping also records a binding table that maps the MAC addresses of devices to their assigned IP addresses, enabling better control and monitoring of IP address allocation within the network.

The other options do not accurately reflect the purpose of the command. For instance, disabling DHCP on the switch does not relate to DHCP snooping, as this command specifically enhances DHCP functionality rather than turning it off. Monitoring DHCP traffic alone does not encompass the broader protective measures implemented by DHCP snooping. Similarly, creating a DHCP relay agent involves different configurations and is not the purpose of enabling DHCP snooping.