800-150 Exam Dumps - Cisco Certified Field Technician (CCT) Questions and Answers

In an enterprise network,Virtual Local Area Networks (VLANs)are the key Layer 2 technology used to logically segment a network into multiple broadcast domains. VLANs allow network administrators to assign individual switch ports to specific VLANs, enabling effective network segmentation and traffic management.

This configuration extends to access layer devices, such as switches where end-user devices connect. By isolating traffic into VLANs, administrators can improve network performance, enhance security by separating sensitive departments (such as finance and HR), and simplify network management.

Unlike routing protocols such as BGP and OSPF, which operate at Layer 3, or MPLS, which is a Layer 2.5 forwarding technology used primarily in service provider networks, VLANs are explicitly designed for Layer 2 segmentation within LAN environments.

Theserial numberfor Cisco switches is typically found on a label located on therear panel near the power supplies. This positioning allows technicians to quickly access identification information even when the device is not powered on.

This label is essential for inventory tracking, RMA procedures, and registration for support. Serial numbers are not typically placed on the top or bottom surfaces for devices mounted in a rack, as those areas are less accessible.

Acrossover UTP (Unshielded Twisted Pair) cableis used to connect two similar devices directly. This includes:​

Switch to switch

Router to router

PC to PC​

The crossover cable reverses the transmit and receive pairs, allowing for proper communication between like devices without the need for an intermediary device.​

Conversely, astraight-through cableis used to connect dissimilar devices, such as:​

PC to switch

Router to switch

PC to router​

This cable maintains the same wiring on both ends, suitable for connecting different types of devices.​

Therefore, when connecting electrically like devices, a crossover cable is appropriate.​

In the providedCisco UCS architecture diagram, the infrastructure consists of:

Two Fabric Interconnects (A and B), each connecting to:

Ethernet (LAN)

Fibre Channel (FC)

FCoE (Fibre Channel over Ethernet)

Both Fabric Interconnects are independently connected to bothCisco UCS Chassis 1 and 2through I/O Modules (IOMs).

This is theclassic active-active UCSdesign, providingfull path redundancyfor all traffic types:

LAN uplinksare handled separately by Fabric Interconnect B.

SAN trafficis distributed throughFC uplinksandFCoE uplinksvia Fabric Interconnects A and B.

Each server in the chassis canfail over its traffic to the alternate fabric if one interconnect fails.

This architecture guaranteesno single point of failure, which is essential inmission-critical environmentslike data centers and enterprise server farms.

The commandcopy tftp: running-configis used to retrieve a configuration file from a TFTP server and merge it with the current running configuration of a Cisco device. Thisoperation is additive, meaning it integrates the new configuration commands into the existing running configuration without removing any pre-existing commands unless explicitly overridden.​

This method is particularly useful when restoring configurations to a replacement device, as it allows for the seamless integration of necessary settings without disrupting the current operational state.​

In contrast, usingcopy tftp: startup-configwould overwrite the startup configuration file, which could lead to unintended consequences upon the next device reload. The optionsload tftp: running-configandmerge tftp: running-configare not valid Cisco IOS commands.​

In wireless networking, theBasic Service Area (BSA)refers to the physical area of radio frequency coverage provided by an access point (AP) in a Basic Service Set (BSS). The BSA defines the coverage area where wireless clients can connect to the network through the AP. The size and shape of a BSA depend on various factors, including the AP's transmit power, antenna type, and physical environment.​

Option A, the Service Set Identifier (SSID), is the network name broadcast by the AP. Option C, Wireless LAN (WLAN), refers to the overall wireless network. Option D, Wireless LAN Controller (WLC), is a device that manages multiple APs in a 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.​

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.​

Cisco Nexus switchesare specifically designed for deployment indata centers, where they providehigh-performance, low-latency switchingto support modern workloads, virtualization, and cloud computing environments.

Nexus switches operate usingNX-OS, a purpose-built operating system optimized for data center needs. These switches support technologies like virtual port channels (vPC), FabricPath, and Application Centric Infrastructure (ACI), which are essential for scalable and highly available data center networks.

They are not typically used in branch offices, as wireless access points, or as edge routers.

Cloud-based managementis a core feature of Cisco Merakiswitches 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.