800-150 Cisco Supporting Cisco Devices for Field Technicians (FLDTEC) Free Practice Exam Questions (2026 Updated)

When replacing afabric interconnectin a Cisco Unified Computing System (UCS), the recommended procedure tominimize traffic disruptionis touse the fabric evacuation procedure on the subordinate fabric interconnect. This ensures that traffic is redirected to the other (active) fabric interconnect, allowing the system to maintain connectivity while one interconnect is replaced.

High availability should remain enabled to preserve redundancy.

Powering down both interconnects would cause a complete outage.

Disconnecting cables without graceful evacuation can result in traffic loss.

Bundle modesimplifies the installation and operation of Cisco IOS XE Software by using a monolithic image file. In thismode, the switch runs directly from the bundled image, eliminating the need to manage individual software packages. This approach is straightforward and reduces complexity, making it suitable for environments where simplicity is a priority.​

However, it's important to note that:​

Bundle mode may result in slower boot times compared to Install mode.

It does not support the independent installation or upgrade of individual packages.

Thepackages.conffile is not utilized in Bundle mode; it's specific toInstall mode.​

Online Insertion and Removal (OIR)is a feature supported by Cisco ASR routers that allows for the insertion and removal of hardware components, such as line cards and modules, while the router is operating. Thiscapability enables maintenance and upgrades without the need to power down the system, thus minimizing network downtime.​

Key aspects of OIR include:​

Seamless Operation:OIR allows for hardware changes without interrupting the router's operation.​

Preservation of Routing Information:The router maintains all routing information and active sessions during the insertion or removal process.

Administrative Shutdown:While not mandatory, it is recommended to administratively shut down the interfaces associated with the component being removed to ensure a graceful transition.​

This feature is particularly beneficial in high-availability environments where maintaining continuous network service is critical.​

TheFLDTECtraining describes theTCP/IP encapsulationas a step-by-step process where data is passed down through the layers of the TCP/IP model:

Application Layer: User data is created (email, file, request) and the application layeradds the application header, creating a data payload.

Transport Layer: The data is segmented. Each segment receives a transport-layer header (TCP/UDP), enabling proper sequencing and error handling at the destination.

Internet Layer: Segments are encapsulated intopackets(IP datagrams), with an IPheader added to facilitate routing between networks.

Link Layer: Finally, packets are framed with Layer 2 headers and trailers (including theFrame Check Sequencefor error detection), creating aframeready to be transmitted on the physical medium.

This layered encapsulation ensuresinteroperabilityandtroubleshooting clarity, which is why it is emphasized inFLDTEC’s IOS Software Basics module.

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.​

Theideal resistance rangefor ESD wrist straps isbetween 1 and 10 megaohms. This range is sufficient to safely discharge static electricity from the technician to ground, while not allowing an abrupt discharge that could damage sensitive electronic components.

Values below 1 megaohm may result in a rapid discharge, risking damage.

Valuesabove 10 megaohms may not discharge static efficiently enough.

To apply a prewritten configuration to a new Cisco device, the console terminal must be inGlobal Configuration Mode. This mode allows administrators to enter configuration commands that affect the device's overall operation. To access Global Configuration Mode, one must first enter Privileged EXEC Mode by typingenable, and then enterconfigure terminal. Once in Global Configuration Mode, theprewritten configuration can be pasted, and the device will accept the commands accordingly.​

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.

Theinstall allcommand is the standard method used to install or upgrade Cisco NX-OS software on Nexus switches. This command streamlines the installation process by automating tasks such as verifying the software image, checking for compatibility, and managing the installation of optional packages or SMUs (Software Maintenance Upgrades). It ensures a comprehensive and efficient upgrade process, minimizing the potential for errors.​Cisco

In contrast:​

copy tftp: running-configis used to copy configuration files, not software images.

install kickstartis an outdated command from earlier NX-OS versions.

boot systemsets the boot variable but does not handle the full installation process.​