400-007 Certification Exam Questions with AI Explanations

QUESTION: 56

Which BGP feature provides fast convergence?

BGP-LS
BGP FlowSpec
BGP-EVPN
BGP PIC

Answer(s): D

Explanation:

BGP PIC (BGP Policy Installed Constraints) is a feature that allows BGP to quickly converge in the event of a topology change. BGP PIC does this by pre-installing policy constraints on BGP routes. This means that when a topology change occurs, BGP only needs to update the policy constraints, rather than the entire routing table.

The other options are not as effective for providing fast convergence. Option A, BGP-LS, is a feature that allows BGP to exchange link-state information. However, BGP-LS does not provide any specific functionality for improving convergence. Option B, BGP FlowSpec, is a feature that allows BGP to control the forwarding of traffic based on flow information. However, BGP FlowSpec does not provide any specific functionality for improving convergence. Option C, BGP-EVPN, is a feature that allows BGP to exchange Ethernet VPN (EVPN) information. However, BGP-EVPN does not provide any specific functionality for improving convergence.

Reference:

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_bgp/configuration/xe-3s/asr903/17-1-1/b-irg-xe-17-1-asr903/b-irg-xe-17-1-asr903_chapter_01.pdf

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QUESTION: 57

Refer to the exhibit. This network is running OSPF and EIGRP as the routing protocols. Mutual redistribution of the routing protocols has been configured on the appropriate ASBRs. The OSPF network must be designed so that flapping routes in EIGRP domains do not affect the SPF runs within OSPF. The design solution must not affect the way EIGRP routes are propagated into the EIGRP domains. Which technique accomplishes the requirement?

route summarization on the ASBR interfaces facing the OSPF domain
route summarization on the appropriate ABRs
route summarization on EIGRP routers connecting toward the ASBR
route summarization on the appropriate ASBRs

Answer(s): D

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QUESTION: 58

Which two mechanisms avoid suboptimal routing in a network with dynamic mutual redistribution between multiple OSPFv2 and EIGRP boundaries? (Choose two.)

AD manipulation
matching OSPF external routes
route filtering
matching EIGRP process ID
route tagging

Answer(s): C,E

Reference:

https://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/8606-redist.html

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QUESTION: 59

Company XYZ has a new network based on IPv6. Some of the subnets that they are planning to use will be confidential and need an addressing scheme that confines them to the local campus network. Which type of IPv6 addresses can be used for these networks in the IPv6 addressing design?

link-local addresses
private addresses
unique local addresses
local addresses

Answer(s): C

Explanation:

Unique local addresses (ULAs) are a type of IPv6 address that can be used for networks that need to be confined to the local campus network. ULAs are not routable on the public internet, which makes them ideal for confidential networks.

The other options are not as suitable for this requirement. Option A, link-local addresses, are only used for communication on the local link. Option B, private addresses, are routable on the public internet, which makes them unsuitable for confidential networks. Option D, local addresses, is a generic term that can refer to any type of IPv6 address that is not routable on the public internet.

Therefore, the best type of IPv6 address for confidential networks is a unique local address.

Here are some additional reasons why ULAs are a good choice for confidential networks:

-ULAs are not routable on the public internet, which makes them ideal for networks that need to be kept private.
-ULAs are easy to configure and manage.
-ULAs are supported by most major operating systems and network devices.

Reference:

https://study-ccna.com/ipv6-unique-local-addresses/

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QUESTION: 60

Refer to the exhibit. An engineer is designing a multiarea OSPF network for a client who also has a large EIGRP domain. EIGRP routes are getting redistributed into OSPF. OSPF area 20 has routers with limited memory and CPU resources. The engineer wants to block routes from EIGRP 111 from propagating into area 20 and allow EIGRP 222 routes to flow in. Which OSPF area type fulfills this design requirement?

type 3 LSA filtering on the ABR between area 0 and area 20
type 5 LSA filtering on the ASBR between EIGRP 111 and area 0
area 20 as a stub area
area 20 as a NSSA area

Answer(s): D

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Cisco Certified Design Expert CCDE v3.0 400-007 Dumps in PDF

Free Cisco 400-007 Real Questions (page: 49)

QUESTION: 56

Explanation:

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QUESTION: 57

QUESTION: 58

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QUESTION: 59

Explanation:

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QUESTION: 60