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Fantastic 400-007 Latest Exam Question & Passing 400-007 Exam is No More a Challenging Task

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The CCDE v3.0 Written exam is a challenging test that covers a wide range of topics related to network design. Some of the key topics covered in the exam include network design methodologies, network security, routing protocols, network virtualization, and network management. To pass the exam, candidates must demonstrate a thorough understanding of these topics and be able to apply their knowledge to real-world scenarios.

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Cisco Certified Design Expert (CCDE) Written Exam Sample Questions (Q72-Q77):

NEW QUESTION # 72
Refer to the table.

A customer investigates connectivity options for a DCI between two production data centers. The solution must provide dual 10G connections between locations with no single points of failure for Day 1 operations. It must also include an option to scale for up to 20 resilient connections in the second year to accommodate isolated SAN over IP and isolated, dedicated replication IP circuits. All connectivity methods are duplex 10 Gbps. Which transport technology costs the least over two years, in the scenario?

A. CWDM
B. MPLS
C. DWDM
D. Metro Ethernet

Answer: D

Explanation:
Let's calculate Total Cost of Ownership (TCO) for 24 months based on the table and given scaling requirements:
-
Metro Ethernet:
* CAPEX = $45,000
* Installation Fee = $5,000
* OPEX = $125,000/year # $250,000 for 2 years
* Total = 45,000 + 5,000 + 250,000 = $300,000
DWDM:
* CAPEX = $250,000
* Installation Fee = $30,000
* OPEX = $100,000/year # $200,000 for 2 years
* Total = 250,000 + 30,000 + 200,000 = $480,000
CWDM:
* CAPEX = $150,000
* Installation Fee = $25,000
* OPEX = $100,000/year # $200,000 for 2 years
* Total = 150,000 + 25,000 + 200,000 = $375,000
MPLS:
* CAPEX = $50,000
* Installation Fee = $75,000
* OPEX = $150,000/year # $300,000 for 2 years
* Total = 50,000 + 75,000 + 300,000 = $425,000
-
Metro Ethernet clearly results in the lowest total cost while meeting dual 10G and scalable growth to 20 connections due to its simple provisioning and operational flexibility.
This approach fully aligns with CCDE v3.1 business-driven cost modeling principles: balancing cost, scalability, and operational simplicity.
Why other options are incorrect:
* B, C, D: All are more expensive after full 2-year calculation for the required scale.
-

NEW QUESTION # 73
Refer to the diagram. Which solution must be used to send traffic from the foreign wireless LAN controller to the anchor wireless LAN controller?

A. Send packets from the foreign controller to the anchor controller via Layer 3 MPLS VPN or VRF- Lite
B. Send packets without encapsulation to the anchor controller over the routed network.
C. Encapsulate packets into an EoIP tunnel and send them to the anchor controller.
D. Send packets from the foreign controller to the anchor controller via IPinIP or IPsec tunnel.

Answer: C

NEW QUESTION # 74
In the case of outsourced IT services, the RTO is defined within the SLA. Which two support terms are often included in the SLA by IT and other service providers? (Choose two.)

A. support availability
B. resolution time
C. network reliability
D. network sustainability
E. network size and cost

Answer: A,B

NEW QUESTION # 75
Refer to the exhibit. Company XYZ BGP topology is as shown in the diagram. The interface on the LA router connected toward the 10.1.5.0/24 network is faulty and is going up and down, which affects the entire routing domain. Which routing technique can the network administrator use so that the rest of the network is not affected by the flapping issue?

A. The LA administrator should use route filtering to block the 10.1.5.0/24 network from getting propagated toward Chicago and New York.
B. The Chicago administrator should use route filtering to block the 10.1.5.0/24 network from coming in from the LA router.
C. The LA administrator should use route aggregation to summarize the 10.1.4.0/24, 10.1.5 0/24,
10.1.6.0/24, and 10.1.7.0/24 networks toward Chicago.
D. The LA administrator should use route dampening for the 10.1.5.0/24 network so that it does not get propagated when it flaps up and down.

Answer: C

NEW QUESTION # 76
Refer to the exhibit.

The network 10.10.0.0/16 has been redistributed to OSPF processes and the best path to the destination from R1 has been chosen as R1-R2-R3. A failure occurred on the link between R2 and R3 and the path was changed to R1-R4-R5-R3. What happens when the link between R2 and R3 is restored?

A. The path reverts to R1-R2-R3 because this was the previous best path
B. The path R1-R4-R5-R3 continues to be the best path because the metric is better
C. The path reverts back to R1-R2-R3 because the route type is E1
D. The path R1-R4-R5-R3 continues to be the best path because OSPF does not compare the metrics between two domains

Answer: C

Explanation:
In the topology shown, the 10.10.0.0/16 network is redistributed into two different OSPF processes-OSPF 1 and OSPF 2-from router R3. The redistribution uses the external route types:
* Into OSPF 1 as an E1 route with a metric of 100
* Into OSPF 2 as an E2 route with a metric of 100
When redistribution occurs in OSPF, two types of external routes can be injected:
* Type E1: Adds the internal OSPF cost to the external cost (total path cost = external metric + internal OSPF path)
* Type E2: Considers only the external cost and ignores internal path cost (default behavior) In this case:
* The path via R2-R3 (E1) includes both the external cost and the internal cost from R1 to R2 to R3. That is: 10 (R1-R2) + 10 (R2-R3) + 100 (external) = 120.
* The path via R4-R5-R3 (E2) will show a constant metric of 100 regardless of the internal OSPF path (10 + 10 = ignored).
So when the link between R2 and R3 fails, the path R1-R4-R5-R3 (E2 route with constant metric 100) becomes the preferred route.
However, when the link between R2 and R3 is restored, the E1 route will be recalculated as:
* Internal cost (R1-R2-R3) = 10 + 10 = 20
* External metric = 100
* Total = 120
OSPF always prefers E1 routes over E2 routes when both are available, even if the E2 route appears to have a better metric. This is because E1 routes provide more accurate end-to-end cost calculation.
Therefore, upon restoration, the routing table reverts to the E1 route via R1-R2-R3.
This behavior is aligned with OSPF protocol standards and is emphasized in CCDE v3.1 under the "Protocol Design Implications" domain, which focuses on redistribution behaviors, route-type preferences, and convergence consistency in multi-domain IGP designs.

NEW QUESTION # 77
......

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