[Apr 27, 2026] Free CCNP Service Provider 300-535 Official Cert Guide PDF Download
Cisco 300-535 Official Cert Guide PDF
NEW QUESTION # 22
An automation engineer is trying to configure a destination group to use dial-out telemetry with gRPC on a Cisco IOS XR platform. The template created is failing to apply. Which parameters must be configured?
- A. destination IP address, destination port, encoding, and protocol
- B. source IP address, source port, encoding, and sampling interval
- C. source IP address, source port, encoding, and protocol
- D. destination IP address, destination port, encoding, and sensor path
Answer: A
NEW QUESTION # 23
What are two advantages of using Python virtual environments? (Choose two.)
- A. They allow for all Python projects to utilize the same set of shared dependencies.
- B. They allow for multiple Python projects to use different versions of the same dependency without conflict.
- C. They allow multiple Python applications to share virtual memory between subprocesses.
- D. They allow for isolated environments where each can use a different version of Python.
- E. They allow for multiple virtual machines to share a single Python environment.
Answer: B,D
NEW QUESTION # 24
Which method maps MPLS EXP bit 5 to COS 5 on Cisco IOS XE?
- A.
- B.
- C.
- D.
- E.
Answer: E
NEW QUESTION # 25
Which Cisco IOS XR high-availability feature is used to prevent routes from being used before LDP converges?
- A. LDP session protection
- B. BFD
- C. IGP session protection
- D. LDP-IGP synchronization
Answer: D
NEW QUESTION # 26
Which of the following three statements are correct regarding IPv6 QoS? (Choose three.)
- A. A 20-bit flow label field enables per-flow processing.
- B. IPv6 QoS features are configured using the modular QoS CLI on Cisco routers.
- C. Per-hop behavior in IPv6 networks is based on EXP bits.
- D. DS-TE is not supported by IPv6.
- E. The traffic class field in the IPv6 header can be used to set specific precedence or DSCP values.
Answer: A,B,E
Explanation:
http://www.cisco.com/en/US/technologies/tk648/tk872/technologies_white_paper0900aecd8026004d.pdf Cisco Systems. IPv6 QoS AT-A-GLANCE RFC 2460/3697 Currently IPv6 provides support for QoS marking via a field in the IPv6 header.
Similar to the type of service (ToS) field in the IPv4 header, the traffic class field (8 bits) is available for use by originating nodes and for forwarding routers to identify and distinguish between different classes or priorities of IPv6 packets.
Current Cisco IOS Software support for IPv6 QoS includes:
Packet classification
Queuing (includes LLQ; excludes legacy PQ/CQ)
Traffic shaping
WRED
IPv6 also has a 20-bit field known as the flow label field (RFC 3697). The flow label enables per flow processing for differentiation at the IP layer.
It can be used for special sender requests and is set by the source node.
The flow label must be modified by an intermediate mode.
Planned Cisco IOS Software support for IPv6 QoS includes:
Compressed Real-Time Protocol (cRTP)
Network-based application recognition (NBAR)
Committed access rate (CAR)
NEW QUESTION # 27
Refer to the exhibit.
Which XML output is a valid instantiation of the YANG model?
A)
B)
C)
D)
- A. Option C
- B. Option D
- C. Option B
- D. Option A
Answer: D
NEW QUESTION # 28
What is a key feature of YANG?
- A. JAVA compatibility
- B. reusable types and groupings
- C. use identification
- D. error prediction
Answer: B
NEW QUESTION # 29
Refer to the exhibit. Which two configuration leaves in this YANG model are optional? (Choose two.)
- A. mtu
- B. type
- C. enabled
- D. oper-status
- E. last-change
Answer: A,E
NEW QUESTION # 30
Refer to the exhibit. A network engineer is expecting the collector to initiate a gRPC session to the router. To accomplish this task, a subscription is specified. A Cisco IOS XR device was configured using the details in the exhibit. When the code is applied, the session is not initiated.
What is the issue?
- A. The destination group must be configured.
- B. The sample-interval has an incorrect value
- C. The proper sensor-path must be configured.
- D. The subscription must be configured
Answer: A
Explanation:
A destination group (collector address/port) must be configured for the telemetry data to be sent from the router to the collector. Without this, the subscription cannot deliver telemetry data.
NEW QUESTION # 31
Refer to the exhibit. Which JSON output is a valid instantiation of the YANG model?
- A.
- B.
- C.
- D.
Answer: C
NEW QUESTION # 32
After a configuration request is sent using NETCONF, which call releases any locks and resources associated with the session?
- A. <close-session>
- B. <close-activity>
- C. <exit-operation>
- D. <boot-app>
Answer: A
Explanation:
Reference: https://tools.ietf.org/html/rfc6241
NEW QUESTION # 33 
Refer to the exhibit. Based on the YANG presented, what is the correct xpath to retrieve the router named "ios- device" under the "CustomerA" service name?
- A. /ncs:abc_service/CustomerA/ios-device
- B. /ncs:services/abc_service/CustomerA/ios-device
- C. /abc_service/CustomerA/"ios-device"
- D. /ncs:service/abc_service/"CustomerA"/ios-device
Answer: B
Explanation:
Section: 3.0 Network Device Programmability
NEW QUESTION # 34 
Refer to the exhibit. Which XML output is a valid instantiation of the YANG model?
- A.
- B.
- C.
- D.
Answer: A
Explanation:
Section: 3.0 Network Device Programmability
NEW QUESTION # 35
A developer must create an Ansible playbook for a Cisco IOS XR device. The playbook must configure an interface that uses variables var_interfce, var_ip, and var_mask for the interface name, IP address, and mask. Which playbook must the developer create?
- A.
- B.
- C.
- D.
Answer: A
Explanation:
The chosen option uses iosxr_config, references all required variables correctly ({{var_ip}}
{{var_mask}} and {{var_interface}}), and uses the correct YAML structure for an Ansible playbook targeting Cisco IOS XR.
NEW QUESTION # 36
Refer to the exhibit. An engineer must change an interface description by adding "-modified" as a suffix. Which code snippet must be added to the box in the code to accomplish this task?
- A.
- B.
- C.
- D.
Answer: A
Explanation:
Chosen option uses the correct requests.patch method, the appropriate Content-type header for YANG-JSON, the correct authentication, and the payload format. This is required to update the interface description through the RESTCONF API.
NEW QUESTION # 37
Refer to the exhibit.
A Python script is created to add a new device on Cisco NSO using RESTCONF API. The device is added successfully, but a 405 Method Not Allowed RESTCONF error code has received as the line to fetch SSH keys runs. Which code is missing to complete the script?
- A. response = requests.post(baseUriOperation + "/devices/device=ios-device/ssh/fetch-host-keys", auth=auth, headers=headers)
- B. response = requests.put(baseUriOperation + "/devices/device=ios-device/ssh/request-host-keys", auth=auth, headers=headers)
- C. response = requests.put(baseUriOperation + "/devices/device=ios-device/ssh/fetch-host-keys", auth=auth, headers=headers)
- D. response = requests.post(baseUriOperation + "/devices/device=ios-device/ssh/request-host-keys", auth=auth, headers=headers)
Answer: D
NEW QUESTION # 38
What are two benefits of using Cisco NSO? (Choose two.)
- A. It uses load balancing services for better traffic distribution.
- B. It abstracts the device adapter and complex device logic from the service logic.
- C. It easily integrates into northbound systems and APIs.
- D. It automatically discovers all deployed services.
- E. It can replace the CI/CD pipeline tools.
Answer: B,C
NEW QUESTION # 39
When troubleshooting LDP operations on the Cisco IOS and IOS XE routers, what is one of the first things that should be verified?
- A. check if the ip cef command has been enabled
- B. verify if there are any access lists that are denying TCP and UDP port 464 packets
- C. verify in the running configurations that all of the required LDP interfaces are defined under the mpls ldp command configuration mode
- D. if running OSPF as the IGP, ensure that OSPFv3 has been enabled
Answer: A
NEW QUESTION # 40
Which data format should be used to serialize structured data in the most compact way?
- A. protobufs
- B. JSON
- C. YAML
- D. XML
Answer: C
NEW QUESTION # 41
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