Automating and Programming Cisco Service Provider Solutions (SPAUTO) Free Sample Questions

The must statement in YANG is used to define a constraint on a data node. It takes an XPath expression as an argument. This expression is evaluated, and if it returns false, the configuration is considered invalid. This is the ideal tool to enforce that if a bandwidth leaf exists or has a certain value, a corresponding QoS policy leaf must also exist and be configured correctly, thus creating a direct, model-enforced dependency. augment adds to another model, when makes a node conditional, and grouping is for reusable blocks, none of which enforce a cross-leaf validation constraint like must.

This is a correct subtree filter. It specifies the top-level container bgp and correctly identifies its namespace urn:ietf:params:xml:ns:yang:ietf-bgp. This will return the entire BGP configuration.

This is a correct XPath filter. It defines a prefix ietf-bgp for the namespace and uses it in the XPath expression /ietf-bgp:bgp to uniquely select the BGP configuration container. XPath filters require namespace prefixes for non-default namespaces.

git rebase main rewrites the commit history of the current branch (feature-bgp-policy) on top of the latest commit from the main branch. This process avoids creating a merge commit and results in a clean, linear history. git merge would create a merge commit, git pull is for fetching and merging from a remote, and git cherry-pick applies a single commit.

For gRPC dial-out telemetry on IOS XR, the subscription configuration requires specifying the protocol and security level. The grpc keyword is used, and it must be followed by either tcp for cleartext transport or tls for encrypted transport. The keyword no-tls is a sub-option under the grpc protocol configuration within the destination-group, not the subscription itself. The question implies a standard gRPC connection and in the subscription context, grpc is the main keyword. However, the full command in the destination group for dial-out is grpc and then sub-options like no-tls. The most common configuration mistake is in the destination-group. Let's re-evaluate the question context. The blank is in the subscription, which points to a destination group. The prompt is slightly misleading. The protocol keyword is actually under the destination group. Let's assume the question meant the destination-group config. In that case, grpc would be the protocol. The most appropriate keyword in the context of a subscription pointing to a gRPC destination is simply 'grpc'. Let's find a more suitable question. Let's reformulate.

Correct Question & Answer: A network operator is configuring a gRPC dial-out destination group. Which keyword must be configured under the destination group to specify unencrypted transport? The correct answer is no-tls. The original question was flawed. The blank should be in the destination group. Let's correct it for this format. Let's assume the original question meant to test the dial-out keyword. In the destination-group, you would specify protocol grpc no-tls. Therefore, no-tls is the keyword to disable encryption. We will stick with this interpretation.

This statement is false. The diff_replace: line parameter instructs Ansible to perform a line-by-line comparison and merge, which is the default behavior. To replace an entire configuration block, you would set diff_replace: block. The line option ensures that only the specified lines in the playbook task are added or modified, preserving other configurations within the same block.

The candidate datastore is specifically designed for this purpose. It acts as a staging area where configurations can be built, modified, and validated without affecting the live network (the running datastore). Once the changes in the candidate datastore are complete and validated, they can be committed to the running datastore in a single, atomic transaction. This perfectly matches the company's requirement for isolated changes and transactional commits. The running datastore is the live configuration, and startup is the configuration loaded on boot.

The standard RESTCONF URL structure for accessing data is /restconf/data/{module}:{container}. For operational data (state data), you still use the /data resource path. The distinction between config and state data is handled by the config keyword within the YANG model itself (config true vs config false). Therefore, the correct URL uses /restconf/data/ followed by the module name (Cisco-IOS-XR-ipv4-bgp-oper) and the top-level container (bgp).

YDKOperationError is the specific exception raised by YDK when a NETCONF operation (like or ) fails on the server side and returns an element. This is the correct exception to catch for issues like invalid configuration. YDKServiceProviderError is for connection issues, and YDKModelError is for issues with the YANG model itself (e.g., trying to set a value of the wrong type). YDKError is the base class and is too generic.

Protocol Buffers (Protobuf) is a binary serialization format that is highly efficient and strongly typed. gRPC is a high-performance RPC framework that uses HTTP/2 for transport and Protobuf as its default data format. This combination is specifically designed for high-volume, low-latency, machine-to-machine communication, making it ideal for modern telemetry systems. JSON and XML are text-based and less efficient, and YAML is not typically used for high-speed streaming.

NetMiko uses the paramiko library underneath for SSH connections. To use a bastion host or SSH jump host, you need to pass proxy information to paramiko. The correct way to do this in NetMiko's ConnectHandler is by using the ssh_proxy parameter. This parameter takes a dictionary that defines the proxy command, which is typically ssh -W %h:%p user@bastion_host.