Refer to the exhibit. An organization is using DHCP Snooping within their network. A user on VLAN 41 on a new switch is complaining that an IP address is not being obtained. Which command should be configured on the switch interface in order to provide the user with network connectivity?
To provide the user with network connectivity and allow the DHCP server's messages to be trusted on a trunk link, the command 'ip dhcp snooping trust' should be configured on the switch interface. This command configures the interface as trusted for DHCP messages, allowing DHCP offers to traverse this link. This is necessary because an untrusted port can obtain IP configurations but cannot offer them, and since this is a trunk port, it is critical to trust DHCP messages to ensure proper IP address allocation.
Even though the correct answer is C the entire question and especially exhibit is stupid. We do not know where the DHCP server is. It could be on the same switch or the other switch reachable via the shown interface. If it is on the same switch then adding "ip dhcp snooping trust" on port 41 won't help because it needs added on the port where DHCP server is connected. An untrusted port is a port that does not accept DHCP server messages. In other words, if a device is connected to an untrusted port, it can obtain IP configuration from the DHCP server but it cannot offer an IP configuration. A trusted port is a port that accepts DHCP server messages. In other words, a DHCP server can provide IP configuration only if it is connected to a trusted port.
I add that command from D is already visible in configuration and answer A i think is incorrect so B and C left. C work like zheka described so theoretically should resolve problem. B I'm not sure if it has any impact for clients, it's just security feature.
perhaps it is using IP DHCP RELAY command...
note here that the config is for the trunk port to a distribution switch and switch to switch ports need to be set to trusted. No detailed information but the possibility exists that the DHCP server is on another switch so without the trunk between switches being trusted no DHCP offers would transit the link
C is correct