What is YANG used for?

Question

Options

• Ascraping data via CLI
• Bprocessing SNMP read-only polls
• Cdescribing data models
• Dproviding a transport for network configuration data between client and server

• A
  4% (2)
• B
  2% (1)
• C
  94% (45)

Explanation

YANG Explained

YANG (Yet Another Next Generation) is a data modeling language used to describe the structure, syntax, and semantics of network configuration and state data - making option C correct. It defines what data looks like (e.g., interfaces, routing tables), but does not handle how that data is transported or retrieved.

Why the distractors are wrong:

• A (CLI scraping): CLI scraping is an informal, unstructured method using tools like Expect scripts - YANG has nothing to do with this.
• B (SNMP read-only polls): SNMP is a separate protocol with its own data modeling system (MIBs); YANG is associated with NETCONF/RESTCONF, not SNMP.
• D (transport for configuration data): This describes NETCONF (which uses SSH as transport) or RESTCONF (which uses HTTP). YANG is the model, while NETCONF/RESTCONF are the transport/protocol mechanisms.

Memory Tip: Think of YANG as the blueprint and NETCONF/RESTCONF as the delivery truck. YANG describes the data; NETCONF/RESTCONF moves it. "YANG = Your data model's Architectural New Guide."

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