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Cisco 300-420 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Enterprise Campus Security	20%	- Design network security - Design network access control
Topic 2: Advanced Addressing and Routing Solutions	25%	- Determine IPv6 migration strategy - Create stable, secure, and scalable routing designs for Layer 3 - Create structured addressing designs
Topic 3: WAN for Enterprise Networks	20%	- Design SD-WAN solution - Design QoS for WAN - Design WAN connectivity
Topic 4: Services	10%	- Design end-to-end QoS policy - Design network management
Topic 5: Advanced Enterprise Campus Networks	25%	- Design campus network services (QoS, multicast, etc.) - Design for high availability - Design Layer 2 and Layer 3 campus networks

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Cisco Designing Cisco Enterprise Networks Sample Questions (Q88-Q93):

NEW QUESTION # 88
A network engineer prepares a script to configure a loopback interface with IP address
172.16.15.12/32. To comply with the company security policies, 'Content-type': 'application/yang- data+json' is added to the script. Connection to the network devices must be secured. Which code snippet must the network engineer use to meet this requirement?

Answer: A

NEW QUESTION # 89
What are the two purpose of the RPF check in multicast routing?

A. to ensure that multicast packets are forwarded if they arrived on the interface used to route traffic back to the source address
B. to ensure that multicast packets are dropped if they arrived on the interface used to route traffic back to the source address
C. to ensure that multicast packets are forwarded if they arrived on the interface used to route traffic to the destination address
D. to ensure that multicast packets, no matter the interface they arrived on. are forwarded out all interfaces
E. to ensure that multicast packets are dropped if they arrived on the interface used to route traffic to the destination address

Answer: A,E

NEW QUESTION # 90
Drag and drop the elements from the left onto the functions they perform in the Cisco SD-WAN architecture on the right.

Answer:

Explanation:

NEW QUESTION # 91
Refer to the exhibit. ISP_C is enabling IPTV services to ISP_A and ISP_B. IPTV services are launched with GLOP IP address range 233.3.1.0/24. PIM-SM already has been enabled globally in each ISP network. RP functions have been configured on edge routers in each autonomous system. ISP_C must implement a connection based on RFC 3618. Which solution achieves this goal?

A. Enable BIDIR-PIM.
B. Enable MP-BGP.
C. Set PIM SSM.
D. Configure MSDP.

Answer: D

Explanation:
MSDP is the correct solution because the question explicitly references RFC 3618, which defines the Multicast Source Discovery Protocol. The design has separate PIM Sparse Mode multicast domains, with RP functions already configured on edge routers in each autonomous system. Cisco explains that MSDP allows rendezvous points in different PIM-SM domains to discover active multicast sources outside their local domain. When a source becomes active, the local RP can advertise source-active information to MSDP peers, allowing receivers in another domain to learn and join the stream. PIM-SSM is not correct because SSM removes the RP dependency and requires receivers to know the source directly. MP-BGP can carry multicast routing information, but it does not perform RP-to-RP source discovery. BIDIR-PIM is a multicast mode for many-to-many shared-tree forwarding, not an interdomain RP discovery mechanism under RFC 3618.
Reference topics: MSDP, RFC 3618, PIM Sparse Mode, interdomain multicast, Source-Active messages, rendezvous points.

NEW QUESTION # 92
A large chain of stores currently uses MPLS-based T1 lines to connect their stores to their data center. An architect must design a new solution to improve availability and reduce costs while keeping these considerations in mind:
- The company uses multicast to deliver training to the stores.
- The company uses dynamic routing protocols and has implemented QoS.
- To simplify deployments, tunnels should be created dynamically on the hub when additional stores open.
Which solution should be included in this design?

A. GET VPN
B. VPLS
C. IPsec
D. DMVPN

Answer: D

Explanation:
DMVPN can be run over MPLS, with all the benefits of QoS. Under the hood, DMVPN is GRE with IPSEC, and GRE will deliver multicast.

NEW QUESTION # 93
......

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