Exam 200-301 topic 1 question 671 discussion

C. Unicast messages from a host at a remote site to a server at headquarters. Pure IPsec is typically used to secure unicast traffic between two endpoints. Unicast traffic refers to one-to-one communication between a specific sender and receiver. In this case, it would involve unicast messages from a host at a remote site to a server at headquarters. IPsec is a protocol suite used to provide secure communication over IP networks. It can be used to encrypt and authenticate IP packets, ensuring the confidentiality, integrity, and authenticity of the transmitted data. While IPsec can also support multicast and broadcast traffic, the term "pure IPsec" generally refers to the use of IPsec in a point-to-point unicast communication scenario.

C is correct

Cisco STP variants use switches configured to send traffic out with a Destination MAC address of 01:00:0C:CC:CC:CD. This is a multicast address, so option 'c' is clearly incorrect too.

Just my input here. Multicast traffic is not related with IPsec at all. It is associated with GRE thus option A is out. Furthermore, IPSec is only passes unicast traffic. Not multicast and broadcast thus option B is out which leaves us with either C or D. I'll go with C as it stated the word unicast. Good enough for me.