Free Practice Questions for Cisco 800-150 Exam

Answer : A

A pre-service checklist is a procedural step followed before replacing an endpoint. Its primary purpose is to confirm that all resources, tools, documentation, and personnel are in place to execute the replacement efficiently and without delays.

It helps avoid service interruptions and ensures a smooth replacement by ensuring that every necessary component and action is accounted for ahead of time.

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Answer : D

Backing up the configuration of a network device before replacement is a critical step to ensure business continuity and minimize downtime. The primary purpose of this backup is to restore the existing settings onto the new device, ensuring that it operates identically to the one being replaced.

This process includes preserving interface configurations, routing protocols, access control lists, and other essential parameters. By restoring the backed-up configuration to the new device, network administrators can quickly reintegrate it into the network infrastructure without the need for manual reconfiguration, thereby reducing the risk of errors and service disruptions.

Options A, B, and C do not align with the primary objective of configuration backups in the context of device replacement.

Answer : D

The Cisco Catalyst 9000 Series is engineered to address the evolving needs of modern enterprise networks by integrating the functionalities of both the core and distribution layers into a unified, converged architecture. This series offers advanced capabilities such as high-speed data forwarding, enhanced security features, and support for automation and programmability, making it suitable for scalable and efficient network designs.

The Catalyst 9000 Series includes models like the Catalyst 9500 and 9600, which are optimized for core and distribution roles, providing high throughput and reliability. These switches support advanced features like Software-Defined Access (SD-Access) and are designed to meet the demands of cloud-scale and security-focused environments.Wikipedia+2Cisco+2Cisco+2

In contrast, the Meraki MS400 Series (Option A) is tailored for cloud-managed aggregation and lacks the comprehensive feature set required for core functionalities. The Catalyst 6500 E-Series (Option B), while historically significant, is considered a legacy platform and may not support the latest advancements in network convergence. The Catalyst 1300 Series (Option C) is designed for small to medium-sized businesses and is not intended for core or distribution layer deployments.

Answer : D

When addressing call quality issues between IP phones, the Real-time Transport Protocol (RTP) is the primary protocol to analyze. RTP is responsible for the actual transmission of voice data during a call, and its performance directly impacts call quality.

Key factors affecting RTP and, consequently, call quality include:

Packet Loss: Missing packets can lead to audio gaps.

Jitter: Variations in packet arrival times can cause choppy audio.

Latency: Delays in packet delivery can result in noticeable lag.

Analyzing RTP streams allows technicians to identify these issues and implement appropriate Quality of Service (QoS) measures to mitigate them.

In contrast:

SIP (Session Initiation Protocol): Handles call setup, modification, and teardown but not the media stream.

SCCP (Skinny Client Control Protocol): A Cisco proprietary protocol for signaling, not media transport.

H .323: An older protocol suite for multimedia communication, encompassing both signaling and media, but less commonly used in modern IP telephony. Reference: Supporting Cisco Devices for Field Technicians (FLDTEC) -- Troubleshooting Methodologie

Answer : B

In the hierarchical network design model, the access layer is the first layer and serves as the entry point for end-user devices to connect to the network. This layer connects user devices such as PCs, IP phones, wireless access points, printers, and scanners to the network. It facilitates the initial connection between end-user devices and the network infrastructure. The access layer also enforces security policies and provides services such as VLAN membership, port security, and Quality of Service (QoS).

Options A, C, and D refer to functions typically associated with the core or distribution layers, or with WAN connectivity, rather than the access layer.

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