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CCDE v3.1 Unified Exam

CCDE v3.1 Written

For example：

QUESTION 245

what are two key design principles when using a hierarchical core-distribution-access network model? （choose two）

A.    A hierarchical network design model aids fault isolation

B.    The core layer is designed first, followed by the distribution layer and then the access layer

C.    The core layer provides server access in a small campus.

D.    A hierarchical network design facilitates changes

E.    The core layer controls access to resources for security

Answer: AD

QUESTION 246

Which two pain points are the most common for container technology adoption? (choose two)

A.    Performance

B.    Security

C.    Cost

D.    Container deployment

E.    Skilled staff

F.     Compliance

Answer: DE

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Practical Exam - Core Technologies

For example：

Based on the recommendations shared by the network design engineer, which OSPF design offers a scalable solution and meets the requirements?

¡  Create zones and deploy them as stub areas to reduce LSA propagation and propose a VPNsolution to further control the traffic.

¡  Create zones and keep each zone in a single standard OSPF area.

¡  Continue to run OSPF in a single backbone area and propose a VPN solution to control traffic.

¡  Keep each spoke site in an independent OSPF area to limit LSAs and use area filters to havebetter control over traffic.

While performing a cost analysis of the SD-WAN solution, which statement is accurate?

¡  SD-WAN will lower overall circuit costs because there is no redundancy requirement forremote sites due to higher reliability of an SD-WAN solution and the self-healing nature.

¡  SD-WAN will lower Ojin's capital expenditure over the next five years as fewer routers willbe required in the next lifecycle refresh.

¡  SD-WAN will lower operating costs over the next five years through the standardization andautomation capabilities of the SD-WAN platform.

¡  SD-WAN will lower initial labor costs by reducing the time-to-deploy of Tyr's new WANenvironment.

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Practical Exam - Workforce Mobility

Scenario details.

…… PFS headquarters has about 1,000 employees who are all equipped with a laptop: Windows or MacBook, depending on employee preference. The laptop connects to the wireless network via an 802.1X SSID to perform daily office operations such as mail, browsing, file exchange, video conferencing, and interaction with cloud and local servers for system transactions. etc.

Technical constraints

What are two technical constraints that can impact the decision to move from 802.11n to 802.11ax? (Choose two.)

o  Access layer cabling must be upgraded from Cate to Cat (or later) to get full capacity and data rates.

o  802.11ax does not support the 2.4 GHz band, so all 2.4 GHz wireless client devices must be replaced with 5 GHz-capable clients.

o  The RF channel plan must be re-evaluated to maximize 802.11ax throughput.

o  Access layer PoE must be evaluated to determine if sufficient power is available for the access points.

o  Access layer switches must support 802.3ax to achieve full interoperability with 802.11ax access points.

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Practical Exam -On-Prem and Cloud Services

Scenario details.

…… This change will enable the majority of their mostly custom applications to support cloud application integrations and ultimately provide the conditions that will ease the migration of customer facing applications to the cloud. Although currently the company is using virtualization with hypervisors and VMs, the goal is to move most of their in-house applications to highly available container platforms.etc.

Why is the chosen strategy for VM migration better than other strategies?

o  It orchestrates ACI stateful changes and VM migration.

o  It focuses on virtual machine migration.

o  Ansible is the industry best practice for orchestration.

o  Ansible playbooks include methods for orchestrating VM migration.

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Practical Exam -Large Scale Networks

Scenario details.

…… The Europe network consists of four main hub locations running MPLS L3VPNs utilizing OSPF as the underlying routing protocol. Two provider-managed data centers are also in Europe, both in the greater London area and managed by EFG Systems (EFG). The downtown London data center has 600 servers, and the Chiswick (suburban London) data center has 1200 servers. etc.

Which two solutions minimize the connectivity impact? (Choose two.)

o  Set the OSPF down-bit.

o  Migrate to L3VPN.

o  Implement BFD.

o  Set the carrier delay to 0.

o  Tune the OSPF timers.

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