Which hierarchical layer has functions such as High availability, port security, and rate limiting?

A.
Core

B.
Access

C.
Network

D.
Distribution

Explanation:
Explanation

Access Layer
The access layer provides user access to local segments on the network. The access layer is characterized by switched LAN segments in a campus environment. Microsegmentation using LAN switches provides high bandwidth to workgroups by reducing the number of devices on Ethernet segments. Functions of the access layer include the following:

Cisco Press CCDA 640-864 Official Certification Guide Fourth Edition, Chapter 2