Pass the Cisco Certified Field Technician (CCT) 800-150 Questions and answers with ValidTests

During the password recovery process on Cisco devices, ROMMON (ROM Monitor) mode is utilized to perform specific actions that facilitate the recovery. Two critical actions typically performed in ROMMON mode are:​

Change the Configuration Register:The configuration register is modified to instruct the device to ignore the startup configuration during the next boot. This is commonly achieved by setting the configuration register to0x2142. This action prevents the device from loading the saved configuration, allowing access without requiring the existing passwords.​

Reboot the Device:After changing the configuration register, the device is rebooted to apply the new settings. This reboot enables the device to bypass the startup configuration, facilitating the password recovery process.​

These steps are essential in the password recovery procedure, allowing administrators to regain access to the device without erasing the existing configuration.​

To back up the startup configuration of a Cisco device to a USB drive, the commandcopy startup-config usbflash0:[filename]is used. This command copies the contents of the startup configuration file stored in NVRAM to a specified file on the USB flash drive. This is particularly useful for creating backups before performing upgrades or replacements.​Option A:Copies the startup configuration to a TFTP server, not a USB drive.

Option B:Attempts to copy from the USB drive to the startup configuration, which is the reverse of the desired operation.

Option D:Copies the running configuration, not the startup configuration, to the USB drive.​

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.​

TheSpine-and-Leafarchitecture is the preferredpod-based deployment modelin modern data centers because of itshigh scalability and flexibility. In this topology:

Leaf switchesconnect to servers and act as the access layer.

Spine switchesfunction as the core layer, interconnecting all leaf switches.

This non-blocking, highly redundant model supportspredictable latency, easy horizontal scaling, and load balancing, making it ideal for cloud-scale and virtualized environments.

Top of Rack (ToR)andEnd of Row (EoR)are physical cabling layouts that do not inherently provide the same level of architectural scalability.

Fabric Extender modelsextend switch ports but depend on upstream switches for intelligence, limiting flexibility.

Theshow flash:command is used todisplay the contents of the device's flash memory, which is where the Cisco IOS image is typically stored. By issuing this command, a technician can verify available space and determine whether there is enough capacity to accommodate a new IOS image before initiating an upgrade or image replacement process.

This command provides a detailed listing of files, their sizes, and the total and available memory space within the flash file system.

show file-systemlists all available file systems but doesn’t detail their content.

show memoryshows runtime memory usage (RAM), not flash memory.

show storageis not a standard IOS command.

Cisco UCS E-Series serversare integrated, blade-style compute modules that can be installed insideCisco ISR(Integrated Services Routers). Their primary advantage is toprovide local compute resources in branch officeswithout needing a full data center environment.

This enables:

Hosting of virtual machines or applications locally

Reduced latency for edge computing

Lowered dependency on central data center resources

These servers are ideal for runningbranch-office workloads, virtualization, or edge analytics, allowing enterprises to deploy scalable compute capabilities closer to the data source.

A → Power supply modules

B → Fan tray assembly

C → Line card slots 1 and 2

D → Supervisor modules

E → Line card slots 5, 6, and 7

The power supply units (A) are at the top, the fan tray (B) is a vertical module on the left, line cards (C and E) span multiple slots horizontally, and supervisor modules (D) are typically placed centrally for control functions.

In theFLDTEC courseunderCisco Modular Hardware Overview, the Cisco Catalyst 9400 series is broken down into clearly defined FRU zones:

Power Supply Modules (A):Located at thetop of the chassis, these provide redundant, hot-swappable power to the switch.

Fan Tray Assembly (B):Mounted vertically on the left, this ensures proper cooling and airflow throughout the chassis.

Line Card Slots 1 and 2 (C):Located in the upper section for network expansion.

Supervisor Modules (D):Positioned centrally, they handle control plane operations, management, and switching logic.

Line Card Slots 5, 6, and 7 (E):Lower slots for high-density port expansion.

Correct FRU identification ensures successful maintenance, upgrades, and hardware replacement during field operations.

The highlighted component on the Cisco I/O module is the chassisconnections LED, which indicates the status of connectivity between the I/O module and the chassis.

In the exhibit, the orange arrow points to asmall rectangular LED indicatorlocated to the left side of the I/O module (Cisco UCS-IOM-2304). This specific LED isnot aligned with the ports, fans, or screws, which helps identify it correctly.

Chassis connections LED (B)is responsible for indicating thestatus of uplink/downlink communicationbetween the I/O module and the chassis.

Greenusually indicates a healthy link.

Amberoroffmay indicate a problem or no connection.

Why the other answers are incorrect:

A. Captive screw→ These are at the far corners, not where the arrow points.

C. Fan module LED→ This IOM doesn’t have user-visible fan LEDs atthe front face.

D. Fixed port→ These are the large rectangular SFP ports clearly visible in the middle, not near the arrow.

This identification is important whentroubleshooting chassis-to-IOM connectivityor verifyingmodule status LEDsduring field maintenance.

In ablade server environment, thechassisserves as the enclosure thathouses multiple blade servers. It provides shared power, cooling, and connectivity resources. Blade servers are compact server modules that insert into the chassis, and the shared infrastructure makes the entire system efficient in space, power, and management.

The chassis does not act as a switch or storage array itself but provides interconnects and sometimes integrated networking components.

Inability to manage or control switch functions → Supervisor module

Failure to maintain optimal temperatures → Fan module

Loss of connectivity on specific ports → Line card

Inability to establish fiber optic connections → Transceivers

Degraded internal data transfer between line cards → Fabric module

From theFLDTEC training materials, Cisco MDS switches are built for high availability and redundancy, but field technicians must know which component impacts whatfunction:

Supervisor Module: Manages control plane functions — a failure results in loss of system-level management or redundancy.

Fan Module: Essential for cooling — failure here leads to overheating and thermal alarms.

Line Card: Provides connectivity — port failures or loss of interface status originate from faulty line cards.

Transceivers (SFP/QSFP modules): Responsible for optical transmission — failure leads to fiber optic link issues.

Fabric Module: Critical for switching between line cards — its failure leads to degraded or disrupted internal traffic paths.

These mappings help techniciansisolate the source of faultsand proceed with the correctRMA or replacementprocedure.