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| Section | Weight | Objectives |
|---|---|---|
| WAN for Enterprise Networks | 20% | - WAN connectivity options
|
| Advanced Enterprise Campus Networks | 25% | - Layer 2 campus design
- Layer 3 campus design
|
| Security Services | 10% | - Secure connectivity - Security architecture design
|
| Network Services | 15% | - Multicast design - IP services
|
| Software-Defined Access (SDA) | 5% | - Control plane and data plane design - SD-Access architecture - Fabric design and deployment |
| Advanced Addressing and Routing Solutions | 25% | - IPv4 and IPv6 addressing design
|
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問題 #362
An engineer must design an addressing plan for a small business using a single /24 network. Each department must have its own subnet. Drag and drop the subnets from the left onto the departments requirements that they fulfill on the right. Not all options are used.
答案：
解題說明：
Explanation:
Human Resources: 10.1.1.112/29; Facilities: 10.1.1.64/27; Engineering: 10.1.1.0/26; Finance: 10.1.1.96
/28.
The addressing plan must use VLSM and assign the smallest subnet that satisfies each department's host requirement without overlapping inside the single /24 block. Engineering needs 32 hosts, so a /27 is not enough because it provides only 30 usable addresses. The smallest listed subnet that satisfies Engineering is
10.1.1.0/26, which provides 62 usable addresses. Facilities needs 18 hosts, so a /27 is appropriate; 10.1.1.64
/27 provides 30 usable addresses. Finance needs 12 hosts, so a /28 is sufficient because it provides 14 usable addresses; the matching listed subnet is 10.1.1.96/28. Human Resources needs 5 hosts, so a /29 is sufficient because it provides 6 usable addresses; the matching listed subnet is 10.1.1.112/29. The unused options either overlap with selected ranges, provide too few hosts for the department, or waste address space unnecessarily.
Cisco addressing design favors hierarchical, nonoverlapping, right-sized prefixes so the plan remains scalable and easy to summarize where possible.
問題 #363
Which feature minimizes HOC connections and reduces strain on the vSmart controller m an SO-WAN architecture?
答案：C
問題 #364
An engineer must design a QoS solution for a customer. The network currently supports data only, but the customer will roll out VoIP and IP video in conjunction with the new QoS solution. The engineer plans to use DiffServ. To ensure priority for voice services, which model must the design include?
答案：B
解題說明：
The 8-class QoS model is the appropriate DiffServ design when an enterprise is adding voice and video to an existing data network and needs priority treatment for voice. Cisco enterprise QoS designs commonly evolve from a simple data-only model to a multi-class model that separates routing/control, voice bearer, video, signaling, transactional data, bulk data, scavenger traffic, and default traffic. This separation is important because voice requires strict low latency, low jitter, and minimal loss, while video usually requires guaranteed bandwidth but must not starve voice or network control traffic. A 4-class model can be too coarse when both VoIP and IP video are introduced because it often collapses distinct traffic types into broad queues. A 12-class model may be appropriate for very mature or complex environments, but it is more operationally demanding.
The 6-class model can work in some cases, but the common Cisco campus and WAN baseline for mixed voice, video, and data is the 8-class model. Reference topics: DiffServ QoS, enterprise QoS class models, voice priority queue, video classification, DSCP design.
問題 #365
A company wants to switch from static to dynamic routing. The branches use DMVPN back to the hub using two internet connections. One internet connection speed is 10 Mbps, and the other is
100 Mbps. All locations use Cisco routers; however, the branch routers have limited memory and CPU resources. Which routing protocol and design solution must the company choose for optimal traffic forwarding during peak traffic times?
答案：C
問題 #366 
Refer to the exhibit. An architect is designing an ISIS solution with these requirements:
* The backbone area will grow to 50 routers in the next 12 months.
* Routers A1 and A2 must avoid suboptimal routing.
* Summarization and route-leaking should be allowed in areas 49.002 and 49.003.
Which solution must the architect select?
答案：B
解題說明：
The correct IS-IS hierarchy places area 49.000 as Level 2 and areas 49.001, 49.002, and 49.003 as Level 1. In IS-IS, Level 2 forms the interarea backbone, while Level 1 areas contain local topology details. This design supports growth in the backbone because Level 2 routers exchange interarea reachability without carrying every local topology change from every access area. Areas 49.002 and 49.003 can perform summarization and route leaking at their Level 1/Level 2 boundaries, allowing routers such as A1 and A2 to avoid suboptimal routing by learning selected more-specific routes from the backbone when necessary. If the nonbackbone areas were made Level 2, the design would flatten the hierarchy and expose more of the network to topology changes. If the backbone were Level 1, interarea routing would be broken or badly constrained. The selected hierarchy preserves scaling, allows route control, and avoids unnecessary propagation of local link flaps.
Reference topics: IS-IS hierarchy, Level 1 areas, Level 2 backbone, route leaking, summarization, scaling.
問題 #367
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