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最新的 CCDE v3.0 400-007 免費考試真題 (Q338-Q343):

問題 #338
Refer to the exhibit.

A customer runs OSPF with Area 5 between its aggregation router and an internal router When a network change occurs in the backbone. Area 5 starts having connectivity issues due to the SPF algorithm recalculating an abnormal number of times in Area 5 You are tasked to redesign this network to increase resiliency on the customer network with the caveat that Router B does not support the stub area How can you accomplish this task*?

A. Implement LSA filtering ontheAB, allowing summary routes and preventing more specific routes into Area 5
B. Set Area 5 to stubby at the ABR anyway
C. Create a virtual link to Area 0 from Router B to the ABR
D. Turn on LSA throttling on all devices in Area 5
E. Increase the bandwidth on the connection between Router A and Router B

答案：A

問題 #339
Network operators have many options available from fully centralized to fully distributed control planes and each approach has its own set of characteristics Drag and drop the characteristics from the left onto the corresponding approach on the right

答案：

解題說明：

* Strictly Centralized Control Plane: Single point of failure and difficult to horizontally scale, most often used in experimental SDN controllers.
* Semi or Logically Centralized Control Plane: Possible convergence difficulties, N instances to configure and manage, easy to horizontally scale, just deploy.
* Fully Distributed Control Plane: Resilient to many failure points but still susceptible to issues around synchronization of state, canonical approach, one instance of control plane per device (logical or real).

問題 #340
If the desire is to connect virtual network functions together to accommodate different types of network service connectivity, what must be deployed?

A. Service Chaining
B. Switching
C. Linking
D. Daisy Chaining
E. Bridging

答案：A

解題說明：
In modern network architectures, particularly those using NFV (Network Function Virtualization),Service Chainingis used to direct traffic through a sequence of virtualized network functions (VNFs)-such as firewalls, load balancers, NAT devices, etc.-based on service requirements.
Service chaining allows:
* Dynamic or policy-based redirection of traffic through VNFs
* Simplified orchestration of network services
* Scalability and flexibility across multi-tenant or virtualized environments CCDE v3.1 emphasizes service chaining as a key enabler in cloud-native and virtualized architectures, ensuring services are efficiently composed based on application or security needs.
Why other options are incorrect:
* A and E (Bridging/Switching): Refer to traditional Layer 2 forwarding and do not provide VNF sequencing logic.
* C and D: "Linking" and "Daisy chaining" are not standard or scalable methods in NFV environments.

問題 #341
Which two conditions must be met for EIGRP to maintain an alternate loop-free path to a remote network?
(Choose two.)

A. The Feasible Distance from a successor is lower than the local Reported Distance.
B. A feasible successor must be present.
C. The Reported Distance from a successor is lower than the local Feasible Distance.
D. The feasibility condition does not need to be met.
E. The Reported Distance from a successor is higher than the local Feasible Distance.

答案：B,C

問題 #342
Network operators have many options available from fully centralized to fully distributed control planes and each approach has its own set of characteristics Drag and drop the characteristics from the left onto the corresponding approach on the right

答案：

問題 #343
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