Cisco CCNP Enterprise (350-401 ENCOR) — All Questions
4 questions
In a traditional three-tier enterprise campus design, which layer aggregates access-layer switches and typically enforces routing policy and redundancy between the access and core?
- a.Access layer
- b.Distribution layer✓
- c.Core layer
- d.Data-center spine layer
The distribution layer aggregates access switches, provides Layer 3 boundaries, applies routing and policy, and offers redundancy toward the core. The access layer connects end devices, and the core provides high-speed, low-latency transport between distribution blocks. In a collapsed-core design the distribution and core functions merge.
In a Cisco SD-Access fabric, which plane is responsible for the mapping database that resolves endpoint identifiers to their location (the LISP map system)?
- a.Data plane
- b.Policy plane
- c.Control plane✓
- d.Management plane
In SD-Access, the control plane node runs LISP and maintains the endpoint-to-location mapping database used to resolve where an endpoint is attached. The data plane uses VXLAN encapsulation for forwarding, and policy is carried with scalable group tags. Separating identity from location is the essence of the fabric control plane.
Which wireless deployment model has lightweight access points forward client traffic through a central controller using CAPWAP tunnels?
- a.Centralized (local-mode) deployment with a WLC✓
- b.Autonomous access points with no controller
- c.FlexConnect with all traffic switched locally
- d.Cloud-managed access points with no tunneling
In a centralized local-mode deployment, lightweight APs tunnel client data and control traffic to a wireless LAN controller over CAPWAP, so the controller centralizes forwarding and policy. Autonomous APs work standalone, and FlexConnect can switch some traffic locally at the branch. CAPWAP tunneling to the WLC defines the centralized model.
Which statement correctly distinguishes the control plane from the data plane in a network device?
- a.The data plane builds routing tables and runs protocols like OSPF
- b.The control plane forwards user packets at line rate
- c.Both planes perform identical functions on modern hardware
- d.The control plane builds forwarding information (running protocols), while the data plane forwards packets based on it✓
The control plane runs routing and other protocols and builds the tables that describe how to forward traffic; the data plane (forwarding plane) uses those tables to move user packets, ideally in hardware at line rate. Keeping these functions distinct is central to understanding both traditional and software-defined architectures.