800-150 Exam Dumps - Supporting Cisco Devices for Field Technicians (FLDTEC)

Before installing or replacingDIMMs (Dual In-line Memory Modules)in a Cisco UCS server, it is essential to verify thecurrent DIMM configuration and the population order. Cisco UCS servers have strict memory population rules to ensure optimal performance and compatibility, particularly in relation to memory channels and banks.

While the type, capacity, and firmware compatibility are important, failing to follow the correct population guidelines can result in failed boot processes or suboptimal performance.

In the hierarchical network design model, theaccess layeris 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.​

The Data Link Layer (Layer 2) of the OSI model is responsible for node-to-node data transfer and plays a crucial role in error detection and media access control. It ensures that data frames are transmitted to the correct device on a local network segment.​

This layer is divided into two sublayers:​

Logical Link Control (LLC):Manages frame synchronization, flow control, and error checking.

Media Access Control (MAC):Controls how devices on the network gain access to the medium and permission to transmit data.

Together, these sublayers ensure reliable data transmission by detecting and possibly correcting errors that may occur in the Physical Layer. They also manage how devices share the transmission medium, preventing collisions and ensuring orderly communication.​

A speed mismatch occurs when two connected Ethernet devices are configured to operate at different speeds. In scenario A, one device is manually set to 1 Gbps, while the other is set to 100 Mbps. Since both ends are hard-coded to different speeds, they cannot successfully negotiate a common speed, leading to a mismatch and resulting in a failed or unstable link.​

In contrast, scenario B, where both ends are manually set to the same speed, ensures compatibility and stable communication. Scenario C can lead to a duplex mismatch rather than a speed mismatch; the auto-negotiating end may default to half-duplex if it cannot determine the duplex setting of the manually configured end. Scenario D is less common; if auto-negotiation fails, devices may revert to their lowest common speed, but this typically results in reduced performance rather than a complete mismatch.​

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.

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.

The correct sequence for mounting a Cisco device in a rack is:​

Install mounting brackets: Attach the appropriate rack-mount brackets to the sides of the device using the screws provided. This step prepares the device for secure installation in the rack.​

Mount in rack: Carefully place the device into the rack, aligning the brackets with the rack posts, and secure it using the appropriate rack-mount screws.​

Ground the device: After the device is securely mounted, connect the grounding wire to the chassis grounding point and then to the facility ground. This step ensures safety and compliance with electrical standards.​

This sequence is recommended to ensure both the physical security of the device and the safety of personnel during installation.​

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.