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Cisco Designing Cisco Enterprise Networks Sample Questions (Q339-Q344):

NEW QUESTION # 339
An engineer must design a VPN solution for a company that has multiple branches connecting to a main office. What are two advantages of using DMVPN instead of IPsec tunnels to accomplish this task? (Choose two.)

A. support for AES 256-bit encryption
B. dynamic spoke-to-spoke tunnels
C. support for anycast gateway
D. greater scalability
E. lower traffic overhead

Answer: B,D

Explanation:
DMVPN is preferred over individually configured point-to-point IPsec tunnels when a company has many branches because it scales the overlay more efficiently. A traditional IPsec tunnel design requires manual or template-based tunnel definitions for every required site-to-site relationship. As branches increase, tunnel count, configuration complexity, and operational overhead grow quickly. Cisco DMVPN combines multipoint GRE, NHRP, and IPsec so spokes can register with the hub and dynamically discover next-hop information for other spokes. This supports a hub-and-spoke control model while allowing dynamic spoke-to-spoke data tunnels when branch-to-branch traffic is required. That is why greater scalability and dynamic spoke-to-spoke tunnel creation are the two design advantages. AES-256 encryption is not unique to DMVPN because normal IPsec can also use strong encryption. Anycast gateway is unrelated to DMVPN WAN overlay design. Lower traffic overhead is not the best answer because DMVPN adds mGRE, NHRP, and IPsec encapsulation overhead; its advantage is operational scalability and dynamic tunnel establishment.

NEW QUESTION # 340
Drag and drop the characteristics from the left onto the configuration protocols they describe on the right.

Answer:

Explanation:

NEW QUESTION # 341
An engineer is creating a design to enable IPv6 to run on an existing IPv4 IS-IS network. The IPv4 and IPv6 topologies will match exactly, and the engineer plans to use the same router levels for each protocol per interface. Which IS-IS design is required?

A. multi topology with transition feature enabled
B. single topology with transition feature enabled
C. single topology without enabling transition feature
D. multi topology without enabling transition feature

Answer: B

Explanation:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_isis/configuration/xe-3s/irs-xe-3s-book/ip6-route-isis-xe.html#GUID-04990BCF-8228-459E-AFAA-9FAF1E2136E9 For single-topology IS-IS IPv6, routers must be configured to run the same set of address families. IS-IS performs consistency checks on hello packets and will reject hello packets that do not have the same set of configured address families. For example, a router running IS-IS for both IPv4 and IPv6 will not form an adjacency with a router running IS-IS for IPv4 or IPv6 only. In order to allow adjacency to be formed in mismatched address-families network, the adjacency-check command in IPv6 address family configuration mode must be disabled.

NEW QUESTION # 342
Refer to the exhibit. Which method must an architect use to provide connectivity between the mail servers?

A. 6rd
B. ISATAP
C. 6to4
D. IPv4 compatible

Answer: C

NEW QUESTION # 343
Which topology within a network underlay eliminates the need for first hop redundancy protocols while improving fault tolerance, increasing resiliency, and simplifying the network?

A. virtualized topology
B. routed access topology
C. logical fabric topology
D. Layer 2 topology

Answer: C

NEW QUESTION # 344
......

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