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| Section | Objectives |
|---|---|
| Enterprise Network Design Principles | - Scalability and high availability design - Design methodologies and best practices |
| Enterprise Campus Network Design | - Campus LAN architecture - Spine-leaf and hierarchical design models |
| Security Design in Enterprise Networks | - Segmentation and access control design - VPN and perimeter security architecture |
| Network Automation and Programmability | - API-driven network automation concepts - Controller-based networking design |
| WAN and Edge Connectivity Design | - SD-WAN architecture and design considerations - Traditional WAN and internet edge design |
| Network Services Design | - Multicast and QoS design considerations - Routing protocols design (OSPF, EIGRP, BGP) |
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NEW QUESTION # 267
Which two statements describe source trees in a multicast environment? (Choose two.)
Answer: C,D
NEW QUESTION # 268
Drag and drop the model driven telemetry characteristics from the left onto the mode they belong to on the right.
Answer:
Explanation:
Explanation:
The telemetry-mode mapping distinguishes configured subscriptions from dynamic collector-initiated subscriptions. In dial-out telemetry, the network device initiates the connection to the collector according to a configured subscription. This model is useful when devices must proactively stream data to a known receiver, especially where firewall policy allows outbound sessions from the network device. In dial-in telemetry, the collector initiates the session to the device and subscribes to the desired data stream. This approach is useful for ad hoc collection, testing, or centralized collectors that can reach the devices directly. Cisco model-driven telemetry also distinguishes periodic and on-change behavior. Periodic subscriptions send data at configured intervals, while on-change subscriptions publish updates when subscribed state changes. These design choices affect firewall rules, collector reachability, device configuration, scale, and data volume. The architect should match telemetry mode to operational requirements: dial-out for stable production streams from many devices, dial-in for collector-driven access, periodic for baselines, and on-change for efficient state-change monitoring.
Reference topics: model-driven telemetry, dial-in, dial-out, subscriptions, periodic and on-change streaming.
NEW QUESTION # 269 
Refer to the exhibit. An architect is designing an IPv4 plan using the 172.16.0.0/16. The design must maximize the number of subnets while meeting these requirements:
* 500 hosts within the server room
* 100 hosts at the remote site
* 25 hosts at the access site
Which plan must the architect choose?
Answer: C
NEW QUESTION # 270 
Refer to the exhibit. A customer is planning to onboard three new VPN partner connections in the data center.
The new subnets must not overlap with the existing data center network, and the subnet size must not be bigger than necessary. The customer dedicated 10.1.8.0/21 for this design. Ho 1 // must the subnets be divided to meet these requirements?
Answer: D
Explanation:
Option B is retained because the subnetting task depends on the exhibit options and the chosen plan must divide 10.1.8.0/21 into nonoverlapping partner VPN subnets without allocating more address space than required. The design principle is variable-length subnet masking: allocate the smallest subnet that satisfies each partner requirement, then place the subnets on valid prefix boundaries inside the reserved aggregate.
Cisco addressing design emphasizes conserving address space, avoiding overlap, and preserving summarization where possible. A /21 provides 2048 total addresses, so the designer can carve several smaller partner ranges while keeping the entire allocation summarizable as 10.1.8.0/21 toward the data-center core.
Incorrect options would either waste addresses, overlap existing ranges, place subnets on invalid boundaries, or allocate blocks larger than necessary. Option B is the mapping that satisfies the exhibit constraints while keeping the design clean for routing, firewall policy, and VPN onboarding. Reference topics: IPv4 VLSM, subnet boundary alignment, partner VPN addressing, summarization, nonoverlapping address design.
NEW QUESTION # 271
Refer to the exhibit.
A network engineer must design a multicast solution based on:
* Many-to-many communications between the users and sources
* Support of up to 50 multicast sources
* Users that must register for steams
Which multicast solution must the engineer select?
Answer: B
Explanation:
Bidirectional PIM is the best fit for this multicast design because the application is many-to-many and has a manageable but meaningful number of multicast sources. Cisco describes BIDIR-PIM as a multicast mode designed for many-to-many applications where sources and receivers can be widely distributed. Unlike classic PIM sparse mode, BIDIR-PIM does not build source-specific shortest-path trees for each active source.
Instead, traffic uses a shared bidirectional tree rooted at the rendezvous point, which reduces multicast state in the network and improves scale when many sources may send to the same group. Source-Specific Multicast is optimized for one-to-many distribution where receivers know the source and join an (S,G) channel; it is not the natural many-to-many choice. Any Source Multicast can support many-to-many traffic but usually creates more state because source trees may be built. Multicast VPN is a transport/service architecture, not the specific multicast mode requested. Reference topics: BIDIR-PIM, many-to-many multicast, shared trees, RP- based forwarding, multicast state scaling.
NEW QUESTION # 272
......
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