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CCDE鈩?Written Exam

Question No: 201 – (Topic 3)

Which two options are two advantages of summarizing networks at the aggregation layer rather than at the core? (Choose two.)

1. It prevents the core from having unnecessary routes.

2. It no longer needs a core layer.

3. It prevents black hole routing.

4. It avoids network-wide impact upon VLAN changes local to the aggregation devices.

Answer: A,D

Question No: 202 – (Topic 3)

A large service provider offers VoIP and Video services to business customers. Which three areas should the service provider monitor related to these services? (Choose three.)

1. bandwidth utilization

2. service response time

3. packet loss

4. jitter

5. latency

6. availability

Answer: C,D,E

Question No: 203 – (Topic 3)

Which multicast technology provides a large, many-to-many connectivity for a new application while minimizing load on the existing network infrastructure?

1. Bidirectional PIM

2. PIM Sparse Mode

3. Any-source Multicast

4. Source Specific Multicast

Answer: A

Question No: 204 – (Topic 3)

Acme Corporation wants to minimize the risk of users plugging unauthorized switches and hubs into the network. Which two features can be used on the LAN access ports to support this design requirement? (Choose two.)

1. BPDU Guard

2. PortFast

3. Loop Guard

4. Port Security

5. UDLD

Answer: A,D

Question No: 205 – (Topic 3)

Which network topology is characterized by a link fate-sharing situation? A)

B)

C)

D)

1. Exhibit A

2. Exhibit B

3. Exhibit C

4. Exhibit D

Answer: B

Question No: 206 – (Topic 3)

In a routed access hierarchical campus design, the access-to-distribution Layer 2 uplink trunks are replaced with Layer 3 point-to-point routed links. Why is it recommended that VLANs are confined on a single access switch rather than span across multiple access switches?

1. to allow for better convergence time

2. to prevent the occurrence of Layer 2 loops

3. to allow for fault isolation

4. to prevent routing black holes

Answer: D

Question No: 207 – (Topic 3)

A large retail bank is designing a unified communications solution to be deployed to its 200 branches. Its current network traffic consists of a web-based portal, Internet browsing, and general file server access. Each branch has between 15 and 20 users. The current WAN is based on Layer 3 MPLS and the customer manages its own CE routers. The WAN circuit interface to the service provider is Gigabit Ethernet, although the MPLS service that is contracted from the service provider is 10 Mb/s. The design is to use a DSCP-based four- class QoS policy to manage traffic demands. From the options below, which two QoS design options that should be implemented on the customer side will meet the requirement? (Choose two.)

1. Shape traffic to 10 Mb/s on the CE router.

2. Police traffic to drop outbound traffic that exceeds 10 Mb/s.

3. Classify DSCP value EF for call signaling and voice packets, and place traffic in a strict priority queue.

4. Priority queue traffic to demand up to 80% of total bandwidth.

5. Enable DSCP-based WRED on all AF classes.

Answer: A,E

Question No: 208 – (Topic 3)

Refer to the exhibit. Service Provider A has offered to help Service Provider B to provide local connectivity for a customer who has a business operation in North America and recently opened an office in Asia. The service to be offered for the customer is a Layer 3 MPLS VPN. Service Provider A and Service Provider B have never shared any business dealings or interconnected their networks. What is the most secure and easiest way for the two service providers to interconnect?

1. carrier supporting carrier

2. eBGP VPNv4 multihop between route reflectors

3. back-to-back VRF

4. VPNv4 peering between ASBRs

Answer: C

Question No: 209 – (Topic 3)

Which option is a BFD design consideration?

1. BFD should not be used with RSVP-TE backup tunnels.

2. BFD echo mode may reduce convergence time.

3. BFD does not support sessions over MPLS LSPs.

4. BFD is supported on indirectly connected peers.

Answer: B

Question No: 210 – (Topic 3)

What are two design characteristics of GETVPN? (Choose two.)

1. It uses GDOI to distribute keys.

2. It supports private addresses over public Internet.

3. It requires multicast replication at the hub.

4. It uses tunnel-less technology.

5. It supports dynamic partial- or full-mesh tunnels.

Answer: A,D

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