D. It enforces configuration semantics:
YANG provides a structured and standardized way to define the configuration and operational semantics of network devices. It allows for clear and consistent definitions of data models, specifying how configuration elements relate to each other and what their intended behavior is. This helps ensure that network devices are configured correctly and consistently.
E. It enforces configuration constraints:
YANG allows for the definition of constraints and validation rules on the configuration data. These constraints help ensure that the configuration adheres to specific requirements, such as data type, range, length, and dependencies between configuration elements. By enforcing configuration constraints, YANG helps prevent misconfigurations and improves the overall reliability and stability of the network.
This statement is incorrect. YANG itself does not enforce the use of a specific encoding format for NETCONF. YANG is a data modeling language used to define the structure, hierarchy, and semantics of data. NETCONF, on the other hand, is a network management protocol that typically uses XML as its encoding format to exchange data between devices and management systems. While YANG models are often associated with NETCONF, YANG itself does not mandate the use of a specific encoding format.
Therefore, option A is not a direct benefit of YANG.
Two benefits of YANG are:
C. It enables multiple leaf statements to exist within a leaf list.
- YANG allows the definition of leaf-lists, which are used to represent lists of leaf nodes with the same name and type, enabling efficient modeling of repeating data elements.
D. It enforces configuration semantics.
- YANG provides a structured and standardized way to define data models for network devices and services, which helps in enforcing configuration semantics. By defining the syntax, structure, and semantics of configuration data, YANG facilitates interoperability and consistency across different devices and vendors.
YANG models can describe constraints to be enforced on the data,
restricting the appearance or value of nodes based on the presence or
value of other nodes in the hierarchy. These constraints are
enforceable by either the client or the server, and valid content
MUST abide by them.
https://www.rfc-editor.org/rfc/rfc6020.html
Multiple answers are corrects ... difficult to choose a best one..
upvoted 2 times
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