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NEW QUESTION # 88
The clients existing network isexperiencing trouble with voice occasionally dropping out on phone calls between office locations, it Is determined that no packet loss is occurring and QOS is likely the cause. With what phenomenon Is the client currently experiencing issues?
Answer: C
Explanation:
The client is experiencing issues with Jitter, as depicted in Option B. Jitter refers to the variation in time between packets arriving, caused by network congestion, timing drift, or route changes. In voice communications, jitter can manifest as the occasional dropping out of voice on phone calls because the variable delay can affect the steady stream of voice packets needed for a clear conversation. Even when there is no packet loss, high levels of jitter can significantly impact the quality of Voice over IP (VoIP) calls.
Quality of Service (QoS) settings are essential in managing jitter, as they can prioritize voice traffic over other types of data, ensuring that voice packets are delivered consistently and in the correct order to minimize delays and prevent call quality degradation. Aruba Campus Access solutions would typically include QoS features to manage and mitigate jitter on the network.
NEW QUESTION # 89
A large multinational financial institution has contracted you to design a new full-stack wired and wireless network for their new 6-story regional office building. The bottom two floors of this facility will be retail space for a large banking branch. The upper floors will be carpeted office space for corporate users, each floor being approximately 100,000 sq ft (9290 sq m). Data centers are all offsite and will be out of scope for this project. The customer is underserved by its existing L2- based network infrastructure and would like to take advantage of modem best practices in the new design. The network should be fully resilient and fault-tolerant, with dynamic segmentation at the edge.
The retail space will include public guest Wi-Fi access. Retail associates will have corporate tablets for customer service, and there will be a mix of wired and wireless devices throughout the retail floors. The corporate users will primarily use wireless for connectivity, but several wired clients, printers, and hard VoIP phones will be in use.
The customer is also planning on renovating the corporate office space in order to take advantage of 'smart office' technology. These improvements will drive blue-dot wayfinding, presence analytics, and other location-based services.
The client would like to ensure redundant RADIUS resources in each of their three geographical regions (AMER, EMEA, and APAC). A large office location is available in each region with sufficient VMware resources available.
- Each region has 5,000 clients, all of which will need to do either 802.1x wired or wireless authentications as well as 802.1x authentication for a single personal device on Wi-Fi.
- All of the non-personal devices will also need to validate health with a local agent.
- A total of 500 guests are expected to be connected on average with a maximum of 700 simultaneous connections making use of Guest Portal for access to the Internet.
- TACACS authentication will also be configured for a total of 1,200 evenly dispersed NADs.
In order to support virtual IPs and server redundancy in each region how many Virtual Policy Manager Licenses will be needed?
Answer: D
Explanation:
In a scenario requiring redundant RADIUS resources across three geographical regions, with the scale of operations as described, opting for six C3000V Virtual Policy Manager licenses would ensure adequate capacity and redundancy. The C3000V model is designed to cater to larger deployments, offering high-capacity RADIUS services suitable for environments with thousands of clients and devices requiring authentication and health validation. By deploying two C3000V instances in each region (AMER, EMEA, and APAC), the financial institution can achieve both high availability and load balancing, ensuring that authentication services remain uninterrupted and efficient, even in the event of a server failure or during maintenance periods. This approach aligns with best practices for enterprise network design, emphasizing resilience and reliability in critical infrastructure components like authentication services.
NEW QUESTION # 90
What is true about 1000 Base-LX single mode transceivers?
Answer: D
Explanation:
The 1000Base-LX standard is designed primarily for single-mode fiber (SMF) but can also operate over multi- mode fiber (MMF). However, when using a 1000Base-LX (long wavelength) transceiver with older multi- mode fiber like OM1 ($62.5/125$ $\mu m$), a specific technical issue called Differential Mode Delay (DMD) occurs.
* Mode Conditioning Patch (MCP) Cable: To mitigate DMD, an MCP cable must be used when connecting a 1000Base-LX transceiver to OM1 or OM2 multi-mode fiber for distances up to 550 meters. This cable offsets the laser launch into the fiber core to ensure the signal propagates correctly.
* OM1 Specifics: OM1 fiber has a smaller bandwidth-distance product compared to newer standards.
Without the MCP, the signal distortion makes the 550m distance unattainable or unreliable.
* Comparison: * OS1 (Option D): This is single-mode fiber. 1000Base-LX transceivers are native to single-mode and do not require mode conditioning cables for OS1/OS2.
* OM5 (Option A): While technically possible, MCPs are typically associated with the legacy
$62.5$ $\mu m$ (OM1) and $50$ $\mu m$ (OM2) fiber types.
* OM2 (Option C): Standard practice dictates that OM2 also requires an MCP for 1000Base-LX at
550m to avoid DMD, making "doesn't need" incorrect.
NEW QUESTION # 91
During the discovery phase, why is it important to identify regulatory compliance requirements?
Answer: A
NEW QUESTION # 92
When planning vsx. which connectivity option is supported but should be avoided when planning Keepalive links?
Answer: A
Explanation:
The VSX Keepalive link is a crucial secondary communication path used to prevent "split-brain" scenarios by monitoring the health of the peer switch when the Inter-Switch Link (ISL) fails.
While multiple methods are technically supported, the OOBM (Out-of-Band Management) interface is generally recommended only as a last resort and should be avoided in high-performance or critical environments for the following reasons:
* Shared Management Infrastructure: Using the OOBM port makes the VSX state dependent on the management network's reliability. If the management switch or network between the two VSX peers fails, it can trigger a false Keepalive failure.
* Latency and Convergence: The OOBM interface typically has lower processing priority and bandwidth compared to front-panel data ports, which can lead to slower convergence or missed heartbeats during periods of high management traffic.
* Best Practice: The preferred method is a Dedicated Interface (Option B) using a direct physical connection between the two switches on a dedicated VRF to ensure maximum reliability and isolation from both the data plane and the management plane.
NEW QUESTION # 93
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