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Cisco 300-420 Exam Syllabus Topics:

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

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300-420合格率書籍 & 300-420資格試験

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Cisco Designing Cisco Enterprise Networks 認定 300-420 試験問題 (Q429-Q434):

質問 # 429
Drag and Drop Question
Drag and drop the characteristics from the left onto the configuration protocols they describe on the right.

正解：

解説：

質問 # 430
Which two statements about VRRP object tracking are true? (Choose two)

A. The priority of a VRRP device can change in accordance with the up or down status of a VRRP object
B. A VRRP group can track only one object at a time
C. VRRP supports only interface tracking
D. The VRRP interface priority must be manually configured by the administrator
E. VRRP can track the status of interfaces and routes

正解：A、E

解説：
VRRP object tracking allows the effective priority of a VRRP router to change when a tracked object changes state. Cisco documentation states that VRRP object tracking ensures the best VRRP router is master by altering VRRP priorities according to tracked objects such as interface or IP route states. This directly supports answer A. It also supports answer D, because VRRP can track interfaces and routes through the tracking process. The priority does not have to remain fixed; object tracking is specifically designed so a router can lower its priority when an uplink, route, or critical dependency fails. A VRRP group is not limited to one tracked object in modern Cisco implementations, so option C is too restrictive. VRRP does not support only interface tracking; route tracking is also a common use case, especially when the LAN interface is still up but upstream reachability has failed. In a resilient campus or branch gateway design, object tracking prevents a router from remaining master when it no longer has a valid upstream path, improving deterministic failover.

質問 # 431
Refer to the exhibit. A customer is running HSRP on the core routers. Over time the company has grown and requires more network capacity. In the current environment, some of the downstream interfaces are almost fully utilized, but others are not. Which solution improves the situation?

A. Add more interfaces to R1 and R2.
B. Make router R2 active for half of the VLANs.
C. Configure port channel toward downstream switches.
D. Enable RSTP on the downstream switches.

正解：B

質問 # 432
An engineer is designing an enterprise campus network.
The LAN infrastructure consists of switches from multiple vendors, and Spanning Tree must be used as a Layer 2 loop prevention mechanism.
All configured VLANs must be grouped in two SIP instances.
Which standards-based Spanning Tree technology supports this design solution?

A. RSTP
B. MSTP
C. STP
D. Rapid PVST

正解：B

質問 # 433
You are implementing WAN access for an enterprise network while running applications that require a fully meshed network, which two design standards are appropriate for such an environment? (Choose two)

A. Multiple MPLS VPN connections with dynamic routing
B. A centralized DMVPN solution to simplify connectivity for the enterprise
C. Multiple MPLS VPN connections with static routing
D. A dedicated WAN distribution layer to consolidate connectivity to remote sites
E. A collapsed core and distribution layer to minimize costs

正解：B、D

解説：
With DMVPN phase 2 and 3, spokes can speak with each other directly like they are directly connected in a meshed network. This simplifies the connectivity for the enterprise -> Answer A is correct.
Another way to run applications that require a fully meshed network is through a WAN distribution layer that is connected to all remote sites. Therefore these sites can communicate with each other via this WAN distribution layer.

質問 # 434
......

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