Cisco Certified Internetwork Expert (CCIE) Practice Test

Which statement describes the role of the access layer switch in a Cisco network?

1. It consolidates data from virtual machines

2. It serves as a core router

3. It enforces security policies

4. It manages cloud resource allocation

The correct answer is: It enforces security policies

In a Cisco network, the access layer switch primarily serves to enforce security policies. This layer acts as the first point of contact for devices connecting to the network, such as PCs, printers, and IP phones. Its role includes implementing security mechanisms like 802.1X for port-based network access control, VLAN segmentation for traffic isolation, and access control lists (ACLs) to restrict unauthorized access. The access layer is designed to control the data traffic entering and leaving the local area network (LAN) environment. By enforcing security policies at this layer, organizations can ensure that only legitimate users and devices gain access to sensitive resources, which is essential for maintaining the overall integrity and security of the network. In contrast, consolidating data from virtual machines is more associated with virtualization platforms rather than the access layer. Serving as a core router typically relates to core layer infrastructure designed to handle the routing and high-performance forwarding of traffic across the network's backbone, which is outside the scope of the access layer's functions. Managing cloud resource allocation is primarily a cloud management task that involves provisioning and orchestration in cloud environments, differing significantly from the responsibilities of access layer switches.