mediumMultiple Choice
350-401 Practice Question: An engineer configures gRPC dial-out telemetry on…
An engineer configures gRPC dial-out telemetry on a Cisco IOS-XE device:
``` telemetry ietf subscription 100 receiver ip address 10.1.1.100 port 50051 protocol grpc-tcp source-address 10.1.1.1 encoding encode-kvgpb filter xpath /interfaces/interface/state/counters update-policy periodic 10000 ```
What is the purpose of the 'source-address' command?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It specifies the source IP address for the telemetry stream.
The 'source-address' command specifies the IP address that the device uses as the source IP when sending telemetry data to the receiver. This ensures that the receiver can identify the device and that the traffic is sourced from a specific interface.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It specifies the IP address of the telemetry receiver.
Why it's wrong here
The receiver's IP is already set by the 'receiver ip address 10.1.1.100' line, so source-address cannot duplicate that role. It sets the local source interface for outgoing gRPC packets; specifying the collector address would be the receiver command's job.
- ✓
It specifies the source IP address for the telemetry stream.
Why this is correct
The source-address command sets the local IP the IOS-XE device uses as the origin of its gRPC dial-out connection, so the collector at 10.1.1.100 sees telemetry arriving from 10.1.1.1 rather than an arbitrary egress interface address.
- ✗
It enables the device to receive telemetry data from the receiver.
Why it's wrong here
Dial-out telemetry pushes data from the device to the collector, so the device never receives telemetry from the receiver. Source-address selects the local IP used as the origin of the outbound gRPC connection; inbound collection describes dial-in or SNMP polling instead.
- ✗
It specifies the IP address of the network management station.
Why it's wrong here
The network management station is the receiver at 10.1.1.100, already defined by the receiver command. Source-address instead sets the device's own local IP for the outbound gRPC session, ensuring return traffic and collector filtering work correctly.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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