Cisco Supporting Cisco Devices for Field Technicians (FLDTEC) 800-150 Exam Dumps: Updated Questions & Answers (October 2025)

The FLDTEC course teaches thatTFTPis a lightweight file transfer protocol often used in Cisco devices for transferring configuration files or IOS images, especially in environments where simplicity is more critical than security:

Advantages:

It has alightweight footprint, making it easy touse and configure.

Useful fortransferring small filessuch as backup configs or small IOS images.

Disadvantages:

Lacks encryption anddoes not support authentication, making itinsecurefor sensitive or production environments.

Not efficientfor large file transfers due to its limited feature set and reliance on UDP (User Datagram Protocol).

This makes TFTP a good fit fortrusted internal networkswhere simplicity is preferred over robust security.

A → Line cards

Provide the physicalinterfaces for network connectivity.

B → Route processor cards

Manage routing functions and system control.

C → Transceivers

Installed in the ports of line cards for optical/electrical signal transmission.

D → Power supplies

Provide power to themodular system and are hot-swappable.

Cisco'sNCS 5500 Seriesis designed for service provider and data center deployments. The FLDTEC course outlines the layout of FRUs in modular platforms like this one:

A – Line Cards: Located in the upper slots, these modules handle the bulk of switching and forwarding functions.

B – Route Processor Cards (RP Cards): Positioned centrally, these provide management and control plane services for the router.

C – Transceivers: Installed into the line cards, transceivers provide physical connectivity through optical or copper interfaces.

D – Power Supplies: Located in the bottom rear section, these modules provide redundant and hot-swappable power to the chassis.

Recognizing each FRU visually and functionally is critical when performingRMA procedures,component diagnostics, orhardware upgradesin the field.

Cisco NX-OSis the operating system specifically developed forCisco Nexus series switches, which are widely used in modern data centers. NX-OS is optimized forscalability, high availability, and virtualization features.

It differs from IOS and IOS XE (used in traditional routers and switches) and IOS XR (used in carrier-grade platforms). NX-OS includes advanced features such as Virtual Port Channels (vPC), FabricPath, and integrated Layer 2/3 capabilities tailored for data center networks.

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.​

These components are part of theCisco Collaboration System Architecture (CSA), and are reviewed in theFLDTEC trainingunderCisco Equipment and Collaboration Basics:

Call Control: Managed by services likeCisco Unified Communications Manager (CUCM), it routes and connects calls.

Collaboration Applications: Provide added value services such asvoicemail (Unity),messaging (IM&P), presence, and more.

Edge Devices: IncludeCisco ExpresswayandCUBE(Cisco Unified Border Element), offering secure access and traversal for mobile/remote endpoints.

Conferencing: Powered by platforms likeCisco Meeting ServerorWebex, enabling multi-party conferencing.

Endpoints: Include bothhardware (IP phones, video units)andsoftware (Webex app)that users interact with directly.

In a Class B network, the default subnet mask is 255.255.0.0, which allocates:​

16 bits for the network portion

16 bits for the host portion​

When the subnet mask is changed to255.255.255.0, it becomes:​

24 bits for the network portion

8 bits for the host portion​

This indicates that8 bitshave been borrowed from the host portion to create additional subnets. Borrowing bits allows for the division of the original network into smaller sub-networks, enhancing organization and security within the network.​

When diagnosing network connectivity issues between a Windows PC and a Cisco device, the combination ofipconfig /allandpingcommands provides comprehensive information:​

ipconfig /all:Displays detailed IP configuration information, including IP addresses, subnet masks, default gateways, DNS servers, and MAC addresses for all network adapters. This information is crucial for verifying correct network settings.​

ping:Tests the reachability of a host on an IP network and measures the round-trip time for messages sent from the originating host to a destination computer. It's a fundamental tool for checking connectivity between devices.​

While other commands likenetstat,tracert,nslookup,arp -a, androute printprovide valuable information,ipconfig /allandpingare typically the first and most informative commands used in initial troubleshooting steps.​

In theFLDTEC course, underSafety and ESD Procedures, Cisco outlines the following safety workflow before working on any network hardware:

Locate Emergency Power-Off Switch: Identifying how to cut power quickly is essential in case of an electrical fault or emergency.

Disconnect Power: Always ensure the power source is turned off and disconnected before handling any components.

Verify with Multimeter: Use a multimeter to confirm that no voltage is present before proceeding.

Connect ESD Strap: Once confirmed safe, attach your ESD strap to a grounded point to prevent electrostatic damage to sensitive components.

Following this process is critical not only forpersonal safetybut also forequipment protection, especially duringhardware installation, maintenance, or RMA replacements.

When installing a fan module in a Cisco Nexus fixed-configuration switch, it's crucial to ensure that theairflowdirection of the new fan matches the existing airflow configuration. Mismatched airflow directions can lead to inefficient cooling or even overheating of components, potentially affecting the performance or lifespan of the switch.

Cisco offers fan modules infront-to-backorback-to-frontairflow variants, and consistency is required for proper thermal management. These modules are also typically hot-swappable, meaning powering down the switch is not necessary.

On Cisco Catalyst 8000 Series Edge platforms, removing the chassis cover provides access to internal components such asDIMMs (Dual In-line Memory Modules)andSSDs (Solid-State Drives). These components are located internally and require the removal of the chassis cover for maintenance or replacement.​

DIMMsare used for system memory and are essential for the router's operation.

SSDsprovide storage for system software and configurations.​

Other components likeNetwork Interface Modules (NIMs)andtransceiversare typically accessible externally and do not require chassis cover removal.​