Important Cisco 350-401 ENCOR Exam Questions

Answer: D

Answer: B

Explanation:

The correct answer is B. TLS.

Key Concept (Cisco SD-WAN Control Plane Security):

In Cisco Catalyst SD-WAN, the architecture separates:

Control Plane Secure communication between controllers and edge devices

Data Plane Encrypted tunnels carrying user traffic

Why B is correct:

The control plane (between vSmart, vBond, vManage, and WAN Edge routers) uses:

TLS (Transport Layer Security)

In some cases also DTLS, depending on configuration

These protocols provide:

Authentication

Encryption

Integrity protection

Thus, TLS is used to establish secure control plane adjacencies.

Why the other options are incorrect:

A . IPsec

Used for data plane encryption (IPsec tunnels), not control plane.

C . IKE

Used for key exchange in IPsec, not for SD-WAN control plane adjacencies.

D . ESP

Part of IPsec (data plane encryption), not control plane.

Final ENCOR Exam Tip:

Memorize this SD-WAN separation:

Control Plane TLS / DTLS

Data Plane IPsec (ESP encapsulation)

This distinction is frequently tested in ENCOR exams.

Answer: C, E

Answer: D

Answer: B

Explanation:

The correct snippet is option B because json.dump(Devices, OutFile) serializes the Python data structure and writes the resulting JSON directly to the open file object. The file is opened in write mode with open('devices.json', 'w'), and OutFile.close() closes the file after writing. Option A is wrong because json.load() reads JSON from a file and converts it into a Python object; it does not write a Python object to disk. It is also being used on a file opened in write mode, which is logically incorrect. Option C writes str(Devices), which produces a Python string representation of the dictionary, not standards-compliant JSON. That output may use single quotes and Python-specific formatting, which is not proper JSON. Option D uses json.dumps(Devices), which returns a JSON-formatted string, but it does not write that string to the file because the return value is ignored. ENCOR automation questions often test the difference between dump, dumps, load, and loads. Reference/topics: ENCOR Automation, Python, JSON, json.dump(), json.dumps(), file output, API data formatting.

Topic 2, Simulation