300-435 · Question #33
Which two statements are benefits of YANG-push telemetry data over traditional data collection methods? (Choose two.)
The correct answer is C. You can precisely define data subscriptions. D. It scales better than SNMP. YANG-push telemetry data offers significant benefits over traditional data collection methods, including the ability to precisely define data subscriptions and improved scalability.
Question
Options
- AThe subscription requests use less bandwidth than SNMP polls.
- BIt uses UDP rather than TCP.
- CYou can precisely define data subscriptions.
- DIt scales better than SNMP.
- EIt is supported on more devices than SNMP.
How the community answered
(35 responses)- B3% (1)
- C94% (33)
- E3% (1)
Why each option
YANG-push telemetry data offers significant benefits over traditional data collection methods, including the ability to precisely define data subscriptions and improved scalability.
While the initial subscription request is small, the primary benefit of YANG-push isn't solely about request size, but rather the overall data transfer efficiency and optimized bandwidth usage compared to continuous polling.
YANG-push telemetry typically relies on reliable, connection-oriented protocols like TCP (e.g., for NETCONF or gRPC-based transport) for guaranteed data delivery, not UDP.
YANG-push telemetry allows engineers to define highly granular data subscriptions using XPath filters, enabling the collection of only specific data points, unlike the broader scope of SNMP MIBs.
By employing a push model where devices stream data to collectors, YANG-push telemetry scales more effectively than traditional SNMP polling, which requires collectors to actively query each device, leading to increased overhead as the network grows.
SNMP has been widely deployed for decades and is supported on a much broader range of legacy and modern devices than the newer YANG-push telemetry, which requires programmable network devices.
Concept tested: YANG-push telemetry benefits
Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/prog/configuration/1612/b_1612_programmability_cg/telemetry.html
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