Which of the following is a primary function of the leaf switch in a spine/leaf architecture?

In a spine-leaf (or IP fabric) architecture, the leaf switches form the access layer of the network. Their primary function is to provide network connectivity for end devices such as servers, storage arrays, and firewalls. Each leaf switch connects directly to these endpoints. To facilitate communication across the data center, each leaf switch also has a direct uplink connection to every spine switch in the fabric. This dual connectivity role—down to endpoints and up to the spine—is fundamental to the architecture's design.

A. Connecting to external gateways is the role of specialized "border leaf" switches, not a primary function of all leaf switches.

B. The spine switches are responsible for forwarding traffic between different leaf switches; traffic does not flow directly from leaf to leaf.

D. While security policies can be enforced at the leaf, this is a secondary function. The primary role is providing connectivity.

1. Juniper Networks TechLibrary. (2023). IP Fabric Architecture. In Data Center Fabric Design and Implementation Guide. "The leaf layer includes access switches that connect to devices in the data center

such as servers and storage devices... Each leaf device connects to every spine device in the IP fabric."

2. Juniper Networks. (n.d.). JNCIA-DC - Data Center Design. Juniper Open Learning. "Leaf switches connect to endpoints

such as servers

storage

and firewalls. Leaf switches also connect to all spine switches in the fabric."

3. Arista Networks. (2021). Spine and Leaf Architecture. In Arista Design and Best Practice Guides. "Leaf switches provide connectivity to servers... Each leaf switch connects to each spine switch in the fabric." (Note: Citing a competitor's documentation is acceptable when it describes an industry-standard architecture).