It's the another unclear question from Cisco as usual.
The one hand a switch with DHCP snooping enabled check ALL packets received on the untrusted interface but the other hand DHCP Snooping isn't a DHCP packet type. Sometimes it's just guessing an answer for non-native speakers.
A switch intercepts all DHCP requests coming from untrusted ports before flooding them
throughout the VLAN. Any DHCP replies coming from an untrusted port are discarded
because they must have come from a rogue DHCP server. In addition, the offending
switch port automatically is shut down in the errdisable state. (From Cisco Official Cert Guide). So I belive that "C" and "E" should be the correct ones
The switch validates DHCP packets received on the untrusted interfaces of VLANs with DHCP snooping
enabled. The switch forwards the DHCP packet unless any of the following conditions occur (in which
case the packet is dropped):
The switch receives a packet (such as a DHCPOFFER, DHCPACK, DHCPNAK, or
DHCPLEASEQUERY packet) from a DHCP server outside the network or firewall.
This maybe incorrect. It should be C:
“A switch intercepts all DHCP REQUESTS coming from untrusted ports before flooding them throughout the VLAN. Any DHCP REPLIES coming from an untrusted port are discarded because they must have come from a rogue DHCP server. In addition, the offending switch port automatically is shut down in the errdisable state”
upvoted 2 times
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