20+ Network Field Engineer Interview Questions and Answers

A modem is a device that modulates and demodulates analog signals to enable digital communication over telephone lines.

• Modem stands for modulator-demodulator

• Old company details: Hayes Microcomputer Products, US Robotics, etc.

• Modems were commonly used for dial-up internet connections

• Modems have evolved to support faster data transfer speeds like DSL and cable modems

RIP stands for Routing Information Protocol. RIPv1 is a classful routing protocol while RIPv2 is a classless routing protocol.

• RIP is a distance vector routing protocol used to exchange routing information within a network.

• RIPv1 does not support VLSM (Variable Length Subnet Masking) while RIPv2 does.

• RIPv1 broadcasts routing updates every 30 seconds while RIPv2 multicasts updates.

• RIPv1 does not support authentication while RIPv2 does.

• RIPv2 supports route tagging for better cont...read more

Switches use VLANs and STP to manage network traffic, while hubs do not. MPLS and BGP are advanced networking protocols.

• Switches use VLANs to segment network traffic, while hubs do not.

• STP (Spanning Tree Protocol) is used by switches to prevent network loops.

• BOOTP (Bootstrap Protocol) is used to assign IP addresses to devices during boot-up.

• MPLS (Multiprotocol Label Switching) is a protocol used for high-performance telecommunications networks.

• BGP (Border Gateway Protocol) is...read more

STP is a network protocol that ensures a loop-free topology in Ethernet networks by blocking redundant paths.

• STP prevents loops in Ethernet networks by blocking redundant paths

• It selects a root bridge to serve as the reference point for the network

• STP calculates the shortest path to the root bridge for each switch

• It uses Bridge Protocol Data Units (BPDUs) to exchange information between switches

• STP can have different variants like RSTP (Rapid Spanning Tree Protocol) and MSTP ...read more

A modem is a device that modulates and demodulates digital data for transmission over analog communication lines. There are two main types of modems: dial-up modems and broadband modems.

• Modem stands for modulator-demodulator.

• Dial-up modems use a standard telephone line to connect to the internet.

• Broadband modems, such as DSL modems and cable modems, provide high-speed internet access.

• Modems can be internal (inside a computer) or external (connected via USB or Ethernet).

LAN areas are frequently monitored for network performance and security.

• Regularly check network traffic and bandwidth usage

• Monitor network devices for any issues or malfunctions

• Implement security measures such as firewalls and intrusion detection systems

• Update network configurations and software to ensure optimal performance

• Conduct regular network audits to identify any vulnerabilities

• Provide training to users on best practices for network usage

SFP stands for Small Form-factor Pluggable, a compact transceiver used in networking devices. Losses in optical fiber refer to the reduction in signal strength as light travels through the fiber.

• SFP is a hot-swappable transceiver used in networking equipment to transmit and receive data over optical fiber or copper cables.

• Losses in optical fiber can occur due to factors like bending, splicing, and impurities in the fiber material.

• Losses are measured in decibels (dB) and can b...read more

Job back and if field refers to the tasks and responsibilities of a network field engineer.

• Job back involves troubleshooting network issues in the field

• Field work includes installing and configuring network equipment

• Network field engineers may also perform maintenance and upgrades on existing networks

Optical fiber is a thin, flexible, transparent fiber made of glass or plastic that can transmit light signals over long distances.

• Optical fiber is used in telecommunications to transmit data over long distances.

• It works by transmitting light signals through the fiber, which bounce off the walls of the fiber and travel to the other end.

• Optical fiber is faster and more reliable than traditional copper wire.

• It is also used in medical equipment, military technology, and industria...read more

High quality refers to superior standards and performance, while low quality indicates subpar standards and performance.

• High quality products are durable and reliable

• Low quality products may break easily and have defects

• High quality services are efficient and effective

• Low quality services may be slow and inaccurate

IP version refers to the specific iteration of the Internet Protocol used for communication between devices on a network.

• IP version 4 (IPv4) is the most commonly used version, using a 32-bit address scheme.

• IP version 6 (IPv6) is the newer version, using a 128-bit address scheme to accommodate the growing number of devices connected to the internet.

• Each IP version has its own set of rules and protocols for addressing and routing data packets.

Frequency can be used to determine the number of occurrences of a repeating event within a specific time period.

• Frequency is measured in hertz (Hz) and represents the number of cycles per second.

• It is commonly used in telecommunications to describe the rate at which data is transmitted.

• In networking, frequency can refer to the range of radio frequencies used for wireless communication.

• Frequency can also be used in troubleshooting network issues to identify patterns of interfe...read more

Salary is the payment or compensation an employee receives from an employer in exchange for work performed.

• Salary is typically paid on a regular basis, such as monthly or bi-weekly.

• It can be a fixed amount or vary based on factors like performance or seniority.

• Salaries can include additional benefits such as health insurance, retirement contributions, and bonuses.

GMW control refers to the process of managing and controlling the Global Manufacturing Warehouse.

• Implementing inventory management systems to track stock levels

• Utilizing barcode scanning technology for accurate stock tracking

• Establishing standard operating procedures for warehouse operations

• Regularly conducting audits to ensure inventory accuracy

Frequency refers to the number of occurrences of a repeating event per unit of time.

• Frequency is measured in Hertz (Hz)

• It is commonly used in the context of electromagnetic waves, sound waves, and electrical signals

• For example, a radio station broadcasting at 100.1 MHz has a frequency of 100.1 million cycles per second

LAN is a local area network that connects devices in a small geographical area, while WAN is a wide area network that connects devices over a large geographical area.

• LAN is typically used in homes, offices, or small businesses.

• WAN connects devices across cities, countries, or even continents.

• LAN has higher data transfer speeds and lower latency compared to WAN.

• Examples of LAN technologies include Ethernet and Wi-Fi, while WAN technologies include MPLS and Internet.

• LAN is easi...read more

Router configuration involves setting up and managing network devices to ensure efficient data transmission.

• Accessing the router's configuration page through a web browser

• Setting up network security protocols such as WPA2

• Configuring port forwarding for specific applications

• Enabling Quality of Service (QoS) to prioritize network traffic

• Updating firmware to ensure optimal performance

Optical Time Domain Reflectometer

• OTDR stands for Optical Time Domain Reflectometer

• It is a device used to test the integrity of fiber optic cables

• OTDR sends a pulse of light down the fiber and measures the reflections to determine the quality of the cable

• It is commonly used in network field engineering for troubleshooting and maintenance

System RAM is faulty

• Diagnose the issue by running memory tests

• Check for any physical damage or loose connections

• Replace the faulty RAM module with a new one

• Update system BIOS and drivers if necessary