400-007 Practice Exam Questions and Answers

Zero Trust principles cover multiple domains:

A (Workload): Securing application workloads regardless of location.

C (Workplace): Securing user access to services across office, remote, or hybrid work models.

Zero Trust design ensures authentication, authorization, and policy enforcement at every access point for both users and applications.

Why other options are incorrect:

B, D, E: These terms are not recognized Zero Trust domains in CCDE or industry frameworks.

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Mutual redistribution between different routing protocols can cause routing loops and suboptimal routing due to:

Route feedback loops (routes being re-imported back into the originating protocol).

Inconsistent administrative distances (AD) leading to selection of suboptimal paths.

Two key mechanisms avoid these issues:

A.  

Administrative Distance (AD) manipulation: Ensures that one protocol is consistently preferred over the other when duplicate routes exist.

C.  

Route tagging: Assigns tags to redistributed routes to identify the source of the route and prevent re-importation (looping) into the originating protocol.

These methods align with CCDE v3.1 principles for multi-protocol control plane design and stability.

Why other options are incorrect:

B & F: Matching routes or process IDs do not directly prevent loops or suboptimal routing.

D is a duplicate of

C.  

E: Filtering helps but is reactive, not a comprehensive prevention mechanism.

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ChatGPT said:???? QUESTION NO: 391

[Main Topic: Scenario-Based Design Strategy Guidance]

Feature-rich and attributed networks are used to model complex systems where nodes and links can represent various relationships and characteristics. Which two alternative network models can be used to model interactions over time or by specific relationships?

A.  

B.  

C.  

D.  

E.  

F.  

Answer: D, F

????Comprehensive Explanation:

D.  

Multilayer Network:This model captures different types of relationships or interactions by separating them into layers. Each layer can represent a specific attribute (e.g., organizational structure, communication paths, or access levels), enabling a more granular view of network behaviors or dependencies.

F.  

Temporal Network:A temporal network models interactions over time by including timestamps or time intervals for each interaction or link. It’s well-suited for analyzing dynamic behaviors such as traffic flow, communication logs, or transaction timelines.

Other options:

❌

A.  

Heterogeneous Network: Refers to networks composed of different technologies or platforms, not necessarily different types of attributes or timelines.

❌

B.  

Information Network: This is a general term and does not specifically define a structured modeling approach for attributes or time.

❌

C.  

Location-Aware Network: Involves geolocation or spatial data but does not inherently model time or multi-attribute structures.

❌

E.  

Probabilistic Network: Uses probability distributions to model uncertain events, not ideal for modeling time or attributes.

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???? QUESTION NO: 392

[Main Topic: Business-Driven Design Approaches]

A company is assessing their technology landscape before moving to the cloud. They observe that over 5000 servers have less than 50% capacity utilization. What cloud architecture model best supports optimizing resource utilization?

A.  

B.  

C.  

D.  

Answer: D

????Comprehensive Explanation:

D.  

Public Cloud:Public cloud services provide elastic and scalable infrastructure. For workloads with low or variable utilization, public cloud offers pay-as-you-go models that significantly reduce the overhead of underutilized on-prem hardware. This is ideal for shifting capital expenditure (CAPEX) to operational expenditure (OPEX), achieving better cost efficiency.

Other options:

❌

A.  

Homogenous Cloud: Not a standard term; it might imply uniform hardware/software environments, but it doesn’t address utilization.

❌

B.  

Heterogenous Cloud: Typically used to describe mixed environments but doesn’t directly offer utilization optimization.

❌

C.  

Hybrid-Private Cloud: Offers flexibility and data control but still often involves maintaining some level of underused on-prem resources unless carefully managed.

1 - target 4

2 - target 5

3 - target 1

4 - target 6

5 - target 2

6 - target 3

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C (Both modes use control packets):Regardless of whether echo packets are used, BFD asynchronous mode always relies on periodic transmission of control packets to verify session liveliness.

E (Echo mode uses separate packets):When echo is enabled, the echo packets are transmitted in addition to control packets, providing even faster failure detection by relying on data plane processing.

Other options explained:

A: Control and echo packets are never combined into a single packet.

B: Both modes always use control packets; echo packets are optional.

D: BFD echo packets are locally looped, not reflected back from the remote device.

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