Which two statements about designing the Data Center Access layer are correct?

Which two statements about designing the Data Center Access layer are correct? (Choose two)

A.
Multiport NIC servers should each have their own IP address

B.
Layer 3 connectivity should never be used in the access layer

C.
Layer 2 connectivity is primarily implemented in the access layer

D.
Multiport NIC servers should never be used in the access layer

E.
Layer 2 clustering implementation requires servers to be Layer 2 adjacent

Explanation:
User access is primarily layer 2 in nature, layer 2 clustering is possible only in layer Here is the explanation from the Cisco press CCDA certification guide Figure 4-8. Enterprise Data Center Infrastructure Overview

Defining the DC Access Layer
The data center access layer’s main purpose is to provide Layer 2 and Layer 3 physical port density for various servers in the data center. In addition, data center access layer switches

provide high-performance, low-latency switching and can support a mix of oversubscription requirements. Both Layer 2 and Layer 3 access (also called routed access) designs are available, but most data center access layers are built using Layer 2 connectivity. The Layer 2 access design uses VLAN trunks upstream, which allows data center aggregation services to be shared across the same VLAN and across multiple switches. Other advantages of Layer 2 access are support for NIC teaming and server clustering that requires network connections to be Layer 2 adjacent or on the same VLAN with one another.

CCDA 640-864 Official Certification Guide Fourth Edition, Chapter 4