The Cisco 800-150 exam, Supporting Cisco Devices for Field Technicians, validates the technical competencies required for field technicians working within the Cisco Certified Field Technician certification path. This exam assesses your ability to support, troubleshoot, and maintain Cisco devices in real-world environments. Whether you are new to field support roles or seeking formal credential recognition, this page provides a structured study roadmap aligned to the official exam blueprint. By understanding the core topics and question formats, you can build targeted preparation and approach the exam with confidence.
Use this topic map to guide your study for Cisco 800-150 (Supporting Cisco Devices for Field Technicians) within the Cisco Certified Field Technician path.
The 800-150 exam uses a mix of question types to evaluate both foundational knowledge and practical field decision-making. Questions progress in difficulty and reflect scenarios you will encounter as a field technician.
Questions increase in complexity as you progress, combining multiple topics to mirror the integrated nature of field support work.
Effective preparation requires a structured schedule that maps exam topics to weekly study blocks and includes regular practice and review cycles. By spacing your learning and testing yourself frequently, you reinforce weak areas and build confidence before exam day.
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Cisco Hardware Replacement and Infrastructure topics typically account for a larger portion of exam questions because field technicians spend significant time on these tasks. However, Networking Foundations and Cisco Software knowledge are essential prerequisites; questions often combine multiple domains to test integrated understanding. Review the official exam blueprint to confirm current topic weightings.
Strong networking knowledge helps you verify that devices function correctly after hardware replacement by testing connectivity, checking interface status, and confirming proper network integration. For example, after replacing a network interface card, you must validate that the device rejoins the network and communicates with other infrastructure components. Understanding both domains ensures you can troubleshoot end-to-end and avoid reintroducing the same device to the field with undetected issues.
Prioritize hands-on work with actual Cisco devices or lab environments that cover hardware identification, safe removal and installation procedures, and software image verification. If live equipment is unavailable, use Cisco learning labs, simulators, or virtual environments to practice navigating device interfaces and executing multi-step procedures. Even brief practical exposure significantly improves your confidence and ability to apply knowledge under exam pressure.
Candidates often overlook safety procedures and best practices in hardware replacement scenarios, choosing the fastest solution rather than the safest one. Another common error is confusing similar device models or software versions, leading to incorrect troubleshooting recommendations. Additionally, misreading scenario details or rushing through multi-step questions causes selection of partially correct answers. Slow down on scenario questions, reread the situation, and verify that your answer addresses the specific constraint or requirement mentioned.
In your final week, focus on weak topic areas identified during practice tests rather than re-reading all material. Take one full-length timed practice test to confirm pacing and identify any remaining gaps. Spend remaining days reviewing explanations for questions you missed, working through scenario-based items, and doing quick spot checks on terminology. Avoid cramming new topics; instead, reinforce what you already know and build confidence in your ability to apply concepts under time pressure.
Which two configuration parameters are most critical to ensure optimal performance when configuring a network port for a newly installed IP phone in an enterprise environment? (Choose two.)
When configuring a network port for a newly installed IP phone, two critical parameters to ensure optimal performance are:
VLAN Assignment: Assigning the correct VLANs is essential for segregating voice and data traffic. Typically, a separate voice VLAN is configured to prioritize voice traffic and enhance security.
Power over Ethernet (PoE): PoE allows the switch to supply power to the IP phone over the same Ethernet cable used for data transmission. This eliminates the need for separate power supplies and simplifies installation.
While QoS classification (Option E) is important for prioritizing voice traffic, it is typically configured at a broader network level. Link aggregation (Option B) and Spanning Tree Protocol (Option C) are more relevant to network redundancy and loop prevention, respectively, and are not directly critical for the initial configuration of an IP phone port.
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What is the purpose of a subnet mask?
A subnet mask is a 32-bit number used in IP networking to divide an IP address into network and host portions. This division is crucial for routing traffic within and between networks. The subnet mask works in tandem with the IP address to identify which part of the address refers to the network and which part refers to the host. This distinction allows for efficient IP address allocation and routing.
For example, in the IP address 192.168.1.10 with a subnet mask of 255.255.255.0, the first three octets (192.168.1) represent the network portion, while the last octet (10) identifies the specific host within that network.
What is a feature of Cisco Meraki switches that simplifies the replacement process?
Cloud-based management is a core feature of Cisco Meraki switches and significantly simplifies the device replacement process. When a failed switch is replaced:
The new hardware can be claimed in the Meraki dashboard.
The previously assigned configuration is automatically applied to the replacement device.
This eliminates the need for local reconfiguration and ensures continuity with minimal manual effort.
This centralized approach ensures that configurations are stored securely and consistently applied across devices.
What is the primary purpose of backing up the endpoint configuration prior to replacing the device?
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.
Refer to the exhibit.
Refer to the exhibit. Which CLI show command identifies the serial number on a router?
The show inventory command is used on Cisco devices to display detailed information about the hardware components installed, including:
Product Identifier (PID)
Serial Number (SN)
Description of the component
In the exhibit, the output clearly shows:
NAME: 'Chassis', DESCR: 'Cisco ISR4451-X/K9'
PID: ISR4451-X/K9, VID: V01, SN: FCW2134L0SH
This confirms that show inventory is the correct command to retrieve the serial number and hardware inventory details.
show version provides some system information and sometimes includes serial numbers, but it's not as reliable or detailed for component-level hardware info.
show idprom is not commonly used and not supported on all platforms.
show platform provides platform-specific info but not typically the serial number.
