Free Cisco 350-401 Practice Exam with Questions & Answers | Set: 4

The correct answer is D. The WLC configuration maps user data ToS level priorities to IP precedence levels.

The exhibit shows the QoS Map feature enabled on the WLC and, under Up Stream, the option UP to DSCP Map is selected.

This means the controller is taking 802.1p User Priority (UP) values and mapping them to DSCP values for upstream traffic. Since 802.1p is a Layer 2 priority marking and DSCP/IP precedence are Layer 3 QoS markings in the IP header, the WLC is performing a priority-marking translation from user priority into IP QoS markings.

In ENCOR terms:

802.1p UP = Layer 2 Class of Service marking

DSCP / IP precedence = Layer 3 QoS marking

The WLC is configured to map UP values to DSCP values

A. The WLC configuration prioritizes traffic based on access group assignment. This is unrelated to the exhibit. QoS mapping here is based on 802.1p UP values, not access group assignment.

B. The WLC uses the Platinum, Gold, Silver, and Bronze levels for traffic classification based on priority. Those are older WLAN QoS profile names, but the exhibit is specifically showing UP-to-DSCP mapping, not profile-based classification.

C. The WLC configuration inherits DSCP values from an upstream AP. This would align with Trust DSCP Upstream, but that option is not selected in the exhibit.

For wireless QoS questions, remember these mappings:

802.1p / CoS / UP = Layer 2 priority

DSCP / IP precedence = Layer 3 priority

If UP to DSCP Map is selected, the controller is converting Layer 2 priority markings into Layer 3 QoS markings.

The correct answer is C. A point-to-point Layer 3 underlay network with jumbo frames enabled .

In Cisco SD-Access , the fabric is built on top of an underlay network . Cisco documentation states that the SD-Access underlay uses a structured Layer 3 foundation and a Layer 3 routed access design , where the network elements establish IP connectivity through routing rather than relying on Layer 2 adjacency. Cisco Catalyst Center LAN automation documentation also describes the underlay links as point-to-point Layer 3 routed connections .

This makes Option C the best answer because it matches the recommended SD-Access design approach:

Point-to-point Layer 3 links in the underlay

Routed access instead of Layer 2 campus meshing

Jumbo frames enabled to accommodate encapsulation overhead commonly associated with fabric technologies such as VXLAN in software-defined fabrics, which is a standard design consideration in Cisco fabric deployments.

Why the other options are incorrect:

A. A fully meshed Layer 2 topology This is not the SD-Access design model. Cisco SD-Access is not based on a campus-wide Layer 2 mesh; instead, it uses a routed Layer 3 underlay.

B. A fully meshed Layer 3 topology SD-Access does require Layer 3 underlay connectivity, but not a fully meshed Layer 3 topology . Cisco recommends a structured routed access design , not an every-device-to-every-device full mesh.

D. A point-to-point Layer 2 network with LACP between devices for redundancy This contradicts the SD-Access underlay principle. The underlay should be Layer 3 point-to-point , not Layer 2 point-to-point.

ENCOR exam point:

For Cisco SD-Access, remember this core design rule:

Underlay = routed, point-to-point, Layer 3 foundation

Overlay = virtualized fabric services on top of that underlay