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| Section | Weight | Objectives |
|---|---|---|
| Advanced Enterprise Campus Networks | 25% | - Design Layer 2 and Layer 3 campus networks - Design campus network services (QoS, multicast, etc.) - Design for high availability |
| Services | 10% | - Design end-to-end QoS policy - Design network management |
| Enterprise Campus Security | 20% | - Design network security - Design network access control |
| WAN for Enterprise Networks | 20% | - Design WAN connectivity - Design SD-WAN solution - Design QoS for WAN |
| Advanced Addressing and Routing Solutions | 25% | - Create stable, secure, and scalable routing designs for Layer 3 - Determine IPv6 migration strategy - Create structured addressing designs |
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NEW QUESTION # 263
An engineer is designing a QoS policy that queues excess packets for later transmission. Which mechanism must be included in the design?
Answer: A
Explanation:
Traffic shaping is the QoS mechanism that queues excess packets and transmits them later to conform to a configured rate. In Cisco QoS design, shaping smooths bursts by buffering traffic instead of immediately discarding it when the offered rate exceeds the configured rate. This makes shaping appropriate on egress interfaces where the enterprise router has a higher physical interface speed than the actual provider committed information rate. WRED and RED are congestion-avoidance mechanisms that drop packets probabilistically to prevent full queue exhaustion, especially for TCP traffic. They do not intentionally hold excess packets for later transmission as the primary behavior. Policing enforces a traffic rate by dropping or remarking traffic that exceeds the configured contract; it does not buffer traffic to smooth bursts. Therefore, when the design requirement says excess packets must be queued for later transmission, the mechanism must be shaping. In WAN edge QoS, shaping is often paired with child queuing policies so latency-sensitive and business-critical classes receive correct treatment inside the shaped parent rate.
NEW QUESTION # 264
A company wants to deploy IPv6 within its existing network infrastructure. All current infrastructure equipment supports IPv6, and the company wants a migration strategy that must not require purchasing additional equipment. The plan must keep operational management costs low, support IPv6 multicast, and allow applications to migrate using DNS. Which strategy must the company choose?
Answer: A
NEW QUESTION # 265
Refer to the exhibit. An engineer is designing a routing solution for a customer. The design must ensure that a failure of network 10.1.0.0/24, 10.1.2.0/24, 10.2.1.0/24, or 10.2.3.0/24 does not impact the core. It also requires fast convergence time during any link failover in the core or access networks.
Which solution must the engineer select?
Answer: C
NEW QUESTION # 266 
Refer to the exhibit A customer requires a Layer 2 network designed to support:
* 500 active logical ports
* trunking of 30 VLANs
* convergence of less than 1 second
Which Spanning Tree Protocol must be selected?
Answer: B
NEW QUESTION # 267
Which feature is required for graceful restart to recover from a processor failure?
Answer: C
Explanation:
https://archive.nanog.org/meetings/nanog42/presentations/Weissner_SSO.pdf
NEW QUESTION # 268
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