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Cisco 300-420 Exam Tests candidates on their knowledge and skills in designing and deploying advanced routing and switching technologies, including Cisco Enterprise Campus Architecture, Software-Defined Access (SDA) and Wireless, Network Services, and Network Security. These skills are crucial for network professionals who want to advance their careers and take on more challenging roles in designing and managing complex enterprise networks.
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To prepare for the Cisco 300-420 Certification Exam, candidates can enroll in Cisco training courses, study Cisco Press books, and practice using Cisco networking equipment. Cisco offers a range of training courses, including instructor-led courses, e-learning courses, and virtual instructor-led courses. In addition, candidates can use Cisco's network simulation software, Packet Tracer, to practice designing and implementing enterprise networks.
NEW QUESTION # 94
Which security functionality does gRPC provide?
Answer: B
Explanation:
gRPC provides secure communication between network devices and control systems by supporting TLS. In Cisco programmability and model-driven telemetry designs, gRPC is commonly used as a high-performance remote procedure call framework that carries structured data encoded with Protocol Buffers. Security is provided through TLS so that the client and server can authenticate and protect the session in transit. The question asks for security functionality, so TLS support is the correct selection. The other options describe incorrect or misleading cryptographic behavior. gRPC does not implement generic RSA tunnel encryption as described in option A, and it does not provide mandatory encryption of data at rest. RC6 with CRC is not the security model used for Cisco gRPC telemetry or programmability. In a secure management design, gRPC should be deployed with certificates, TLS verification, controlled access lists, and appropriate AAA integration so only authorized collectors or controllers can communicate with infrastructure devices.
Reference topics: gRPC, TLS, model-driven telemetry, Protocol Buffers, secure automation transport.
NEW QUESTION # 95 
Refer to the exhibit A customer requires maximum uptime for the data plane between R1 and R3 running OSPF Which solution must the design include for high availability if the routing process on R2 requires maintenance?
Answer: C
Explanation:
Graceful restart is the correct high-availability design when the routing process on an intermediate OSPF router must undergo maintenance while the data plane remains available. Cisco describes graceful restart as a mechanism that allows a restarting router to continue forwarding traffic while neighbors temporarily preserve adjacency and route information. In OSPF, helper-capable neighbors assist the restarting router by maintaining forwarding state during the restart interval, preventing unnecessary route withdrawal and reconvergence. BFD is a failure-detection mechanism, so it would actually accelerate detection of a failure rather than preserve the forwarding path during planned process maintenance. Nonstop forwarding must be enabled on the device performing the control-plane restart and supported by neighbors, but the broad answer choice that captures the required routing-protocol behavior across the design is graceful restart on the participating routers. Configuring it only on R1 and R3 or only on R3 would not support the R2 process maintenance scenario. Reference topics: OSPF graceful restart, NSF, helper mode, control-plane maintenance, data-plane availability.
NEW QUESTION # 96
Which two steps can be taken to improve convergence in an OSPF network? (Choose two.)
Answer: A,B
Explanation:
Section: Advanced Addressing and Routing Solutions
NEW QUESTION # 97
An engineer must design a scalable QoS architecture that allows the separation of the traffic into classes on predefined business requirements. The design must also utilize the differentiated services code points as the QoS priority descriptor value and support at least 10 levels of classification. Which QoS technology should the engineer include in the design?
Answer: A
Explanation:
DSCP Values allow for > 10 classes and are used in DiffServ to discriminate traffic.
NEW QUESTION # 98
Refer to the exhibit. Which two solutions maximize the use of the links between the core and distribution layers? (Choose two.)
Answer: A,E
NEW QUESTION # 99
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