Cisco Updated 350-401 Exam Questions and Answers by lloyd

 The correct HTTP status code for a request with an incorrect password applied to a REST API session is 401 Unauthorized. This status code indicates that the request has not been applied because it lacks valid authentication credentials for the target resource. If the request included authentication credentials, then the 401 response indicates that authorization has been refused for those credentials. The server generating a 401 response must send a WWW-Authenticate header field containing at least one challenge applicable to the target resource. References := HTTP Status Codes - REST API Tutorial, Stack Overflow discussion on HTTP status code for incorrect login

To support the MPLS LDP (Label Distribution Protocol) session between the headend and tailend routers for a Cisco MPLS TE (Traffic Engineering) tunnel, extended discovery must be configured. This is achieved by configuring a targeted neighbor session. Targeted LDP sessions are used to establish LDP adjacencies between non-directly connected LSRs (Label Switch Routers), which is necessary for setting up MPLS TE tunnels that span multiple hops. References: Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) v1.01.

 In a Cisco SD-Access solution, the control-plane node’s function is to operate a mapping system that manages the relationships between endpoints and network devices. This involves maintaining a database of all endpoints connected to the network, including their location, identity, and network access policies. The control-plane node is crucial for ensuring that endpoints can be correctly located and communicated with across the network, facilitating efficient routing and policy enforcement.

 In the context of Cisco Wireless Access Points (APs), the client mode allows an AP to function similarly to a WLAN client. This mode is particularly useful for testing the wireless environment from a client’s perspective. By operating in client mode, the AP associates with another AP as a client would, allowing it to test the end-to-end connectivity and identify any potential issues that a regular client might encounter. This mode is instrumental in troubleshooting client connectivity problems and ensuring that the wireless network is properly configured and operational for client devices.