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2021 Apr 352-001 exam
Q61. You are the lead network designer hired by Service Provider XYZ to deploy CoS functionality on the core MPLS network (P routers). The goal of the network design is to provide a complete CoS solution to all customers that purchase services such as dedicated Internet access, MPLS L3VPN, and L2VPN (pseudowire). Service Provider XYZ has these design requirements:
The network supports four service queues with equal treatment for delay, jitter, and packet loss.
Queues are numbered 0-3, where 0 is the default queue.
Three queues have one treatment.
One queue has either one or two treatments.
If your design includes eight CoS queues on the Service Provider XYZ MPLS PE router ingress (CE facing) interface, how will customer traffic be classified as it enters the MLS P routers?
A. The eight CoS queues in the MPLS P router are remapped to the eight CoS queues.
B. Traffic is classified on the MPLS PE routers on core facing interface. The DSCP value is mapped into EXP field where multiple EXP settings (2+) will be assigned to a single queue throughout the MPLS P routers.
C. Discard the traffic from the eight CoS queues that does not match the four CoS queues of the MPLS P routers.
D. The 8 CoS queues in the MPLS P router are remapped to four 4 flow-label queues.
Answer: B
Q62. Refer to the exhibit.
Assume that no multicast optimization is done on LAN switches A and B. Which feature can be used to optimize multicast traffic forwarding in this situation?
A. Enable IGMP snooping querier on both switches.
B. Configure a static MAC entry for the multicast server.
C. Disable IGMP snooping on both switches.
D. Disable the IGMP query election process.
E. Enable PIM Snooping on both switches.
Answer: A
Q63. Refer to the exhibit.
You are planning the design of an encrypted WAN. IP packets will be transferred over encrypted GRE tunnels between routers B and C. The packet size is limited to a maximum of 1500 bytes inside the WAN between routers B and C. If endpoint 1 tries to send 1500-byte IP packets to endpoint 2, in what three ways will the network design handle the fragmentation in three different possible network configurations? (Choose three.)
A. When router B fragments packets after the encryption, router C must reassemble these fragmented packets.
B. When router B fragments packets before the encryption, router C must reassemble these fragmented packets.
C. When router B fragments packets after the encryption, the endpoint 2 must reassemble these fragmented packets.
D. When router B fragments packets before the encryption, endpoint 2 must reassemble these fragmented packets.
E. When router A fragments packets, router C must reassemble these fragmented packets.
F. When router A fragments packets, endpoint 2 must reassemble these fragmented packets.
Answer: ADF
Q64. What are two design advantages to using virtual port channel? (Choose two.)
A. enhanced system availability through multiple systems
B. reduced Spanning Tree Protocol convergence time
C. loop management without use of Spanning Tree Protocol
D. ability to use Spanning Tree Protocol blocked ports to forward traffic
E. enhanced ability to recover from Spanning Tree Protocol changes
Answer: AC
Q65. You are designing a network to support data, voice and video. Which two main factors will you address to improve network convergence? (Choose two.)
A. event propagation delay
B. failure detection delay
C. forwarding engine update delay
D. routing table recalculation delay
Answer: BD
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Q66. Which technique can you use to detect forwarding path failures at a uniform rate, and reconvergence times will be consistent and predictable when your routers are in the same broadcast domain?
A. Enable BFD on your routers.
B. Configure your routers with IP-SLA to ping the peer router.
C. Configure your routers with IP-SLA and track to ping the peer and switch to a default route if the pings fail.
D. Tune your routing protocol timers.
Answer: A
Q67. You are working on a network design for Customer A. This design should consider fast convergence features, and it was agreed that BFD should be used for faster link-transition detection. Which three options apply to the use of the echo function in BFD? (Choose three.)
A. It can be used with asynchronous mode.
B. BFD control packets are not required.
C. It can be enabled individually in each direction.
D. It has the advantage of testing the forwarding path on the remote system.
E. The rate of periodic transmission of BFD control packets should be increased.
Answer: ACD
Q68. A switched network is being designed to support a manufacturing factory. Due to cost constraints, fiber-based connectivity is not an option. Which design allows for a stable network when there is a risk of interference from the manufacturing hardware in use on the factory floor?
A. Design the network to include UDLD to detect unidirectional links and take them out of service.
B. Design the network to include EtherChannel bundles to prevent a single-link failure from taking down a switch interconnection point.
C. Design the network to include loop guard to prevent a loop in the switched network when a link has too much interference.
D. Design the network to include BackboneFast on all devices to accelerate failure convergence times.
Answer: A
Q69. When creating a network design that routes an IGP over L2VPNs, with which device does the remote CE router form an IGP adjacency?
A. the hub site PE router
B. the hub site CE router
C. the directly connected PE router
D. The IGP will not establish adjacency over the MPLS network.
Answer: B
Q70. Refer to the exhibit.
This Layer 2 ring has 10 VLANs with 1000 MAC addresses in each VLAN. Which protocol or mechanism provides the shortest traffic outage if the link marked with "X" fails?
A. PVRST
B. REP
C. MST
D. G.8031
E. BFD
Answer: B
