Wi-Fi Technology and Railnet Overview
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Questions and Answers

What should be done to ensure network efficiency, according to the maintenance schedule?

  • Ensure the equipment is kept clean and tidy. (correct)
  • Change the IP addressing scheme regularly.
  • Ignore any additional checks suggested by manufacturers.
  • Store configuration files only when necessary.

Which of the following actions is prohibited regarding network configuration?

  • Train the staff on network maintenance.
  • Store softcopy of the configuration files.
  • Change the configuration without permission. (correct)
  • Document the configuration.

What is a recommended practice for maintaining the integrity of cables in the network?

  • Route cables through open areas for easy access.
  • Use water to clean the cables.
  • Bury cables underground without any protection.
  • Ensure cables are protected from rodents. (correct)

What should be done regarding passwords in a network environment?

<p>Periodically change the passwords. (D)</p> Signup and view all the answers

Which action related to the UPS should be considered during capacity planning?

<p>Ensure the electrical earth meets required standards. (B)</p> Signup and view all the answers

What is one way to minimize interference in a wireless network?

<p>Relocating wireless networking hardware (A)</p> Signup and view all the answers

Which security measure is NOT typically recommended for Wi-Fi networks?

<p>Dynamic IP addressing (B)</p> Signup and view all the answers

What characteristic can enhance the capacity of a radio link?

<p>MIMO (Multiple Input-Multiple Output) (B)</p> Signup and view all the answers

What is a recommended configuration for access points in a typical office environment?

<p>Configuring as extended service sets (B)</p> Signup and view all the answers

What factor significantly affects the range and speed of wireless networks?

<p>Environment where the access point operates (D)</p> Signup and view all the answers

Why is security an important element in Wi-Fi usage?

<p>To prevent unauthorized access (B)</p> Signup and view all the answers

In an office setting, what is the desirable number of users per access point for optimal performance?

<p>20-25 users (B)</p> Signup and view all the answers

What should be configured for personnel access points in an office?

<p>WPA-2 security (D)</p> Signup and view all the answers

What is the preferred method for powering access points to ensure uninterrupted service?

<p>Powering using PoE from the switch port (A)</p> Signup and view all the answers

What security feature should be configured in addition to the WPA-2 security key for temporary access points?

<p>MAC binding (C)</p> Signup and view all the answers

Why is it important to use the same SSID for all access points within a campus?

<p>To facilitate smooth roaming for users (D)</p> Signup and view all the answers

Which of the following helps in diagnosing hardware issues with networking equipment?

<p>Checking visual indications on the equipment (A)</p> Signup and view all the answers

What should be ensured about the installation environment for networking equipment?

<p>Temperature maintained according to manufacturer specifications (C)</p> Signup and view all the answers

What type of power supply is essential to increase the life of the access point equipment?

<p>Uninterrupted Power Supply (UPS) (B)</p> Signup and view all the answers

How can software issues with managed equipment be addressed?

<p>Through upgrading the firmware (A)</p> Signup and view all the answers

What measures should be taken when configuring a residence Wi-Fi access point?

<p>Configure WPA-2 security and consider MAC binding (C)</p> Signup and view all the answers

What is a primary function of a Wireless Local Area Network (WLAN)?

<p>To link a group of computers and IP-enabled devices wirelessly. (D)</p> Signup and view all the answers

How does an access point (AP) function within a wireless network?

<p>It connects to the wired network to enable wireless communication. (C)</p> Signup and view all the answers

What role do wireless controllers play in a WLAN?

<p>They manage access points and optimize network performance. (A)</p> Signup and view all the answers

Which frequency bands are most commonly utilized by Wi-Fi networks?

<p>2.4 GHz and 5 GHz. (C)</p> Signup and view all the answers

What is the effect of having more computers connected to a wireless access point?

<p>It leads to a decrease in data each device can transmit. (A)</p> Signup and view all the answers

What device can make a non-wireless device connect to a WLAN?

<p>A wireless adapter. (C)</p> Signup and view all the answers

What happens to the signal strength as a device moves closer to an access point?

<p>The signal strength increases and connection speed improves. (B)</p> Signup and view all the answers

For which type of device is Wi-Fi especially beneficial when wiring is not feasible?

<p>CCTV cameras. (D)</p> Signup and view all the answers

Flashcards

What is a Wireless Local Area Network (WLAN)?

A system that connects devices like computers, smartphones, and smart TVs wirelessly using radio waves.

What is Railnet?

The primary network that connects all devices within Indian Railways.

What is an Access Point (AP)?

A device that allows wireless devices to connect to a wired network, converting wireless signals to wired signals and vice versa.

What are Wireless Controllers?

A device that manages multiple access points in a wireless network. They control signal strength, minimize interference, and offer user management features.

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What is RF (Radio Frequency) in Wi-Fi?

The frequency band used by Wi-Fi networks for transmitting data. Common bands are 2.4 GHz and 5 GHz.

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How does distance impact Wi-Fi connection speed?

The closer a device is to the access point, the stronger the signal and faster the data transfer.

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What is a shared network?

A shared network where multiple devices access the same bandwidth. More devices mean slower speeds for each individual device.

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How can Wi-Fi be used for network connections?

Utilizing Wi-Fi technology to connect two networks or a single device to a network wirelessly. This is often used for security cameras where wired connections are impractical.

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Interference in wireless networks

The ability of radio waves to be absorbed or reflected by different materials, affecting the strength and consistency of a wireless signal.

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MIMO (Multiple Input-Multiple Output)

Using multiple antennas to transmit and receive data simultaneously, improving the capacity and reliability of a wireless link.

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SSID (Service Set Identifier)

A unique identifier that distinguishes a specific Wi-Fi network from others.

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MAC filtering

A security measure that allows only devices with specific MAC addresses to connect to a Wi-Fi network.

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WPA (Wi-Fi Protected Access)

A security standard for Wi-Fi networks that uses strong encryption to protect data transmissions.

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Wi-Fi as a service in office environments

An access point that provides Wi-Fi connectivity as a service to users within a specific area, typically managed by a central network controller.

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Extended Service Sets (ESS)

A type of wireless network configuration where access points are managed centrally, allowing for optimized performance and security.

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User density in Wi-Fi design

A guideline for the number of users that can be supported by a single Wi-Fi access point in a typical office environment.

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Bandwidth Allocation

Ensuring each user receives sufficient bandwidth for a good internet experience.

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UPS for Access Points

Using an uninterrupted power supply (UPS) to keep network devices running even during power outages.

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Shared SSID for Roaming

Using the same network name (SSID) on all access points within a building or campus for seamless movement between areas.

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Redundant Wireless Controllers

Having two or more wireless controllers, so if one fails, the other takes over, ensuring network management continues.

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MAC Binding

A security technique for temporary user access where the access point only allows devices with specific MAC address to connect.

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Network Fault Diagnosis

Diagnosing problems related to hardware, software, and connection media in network equipment.

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Network Equipment Installation Environment

Installing network equipment in a clean and well-ventilated environment to prevent damage.

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Uninterrupted Power Supply for Equipment

Providing uninterrupted power supply to extend the lifespan of network equipment and ensure continuous operation.

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UPS Capacity and Local Power Supply

The capacity of your UPS (Uninterruptible Power Supply) should be determined by the reliability of your local electricity grid. If power outages are frequent, you need a UPS with longer backup time.

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Electrical Grounding

Make sure your electrical grounding system is working properly within the specified limits outlined by the standards.

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Network Equipment Maintenance

Regularly clean and maintain your network equipment to prevent dust accumulation.

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Network Configuration Backups

Always create backups of your network configuration files. This ensures you can quickly restore the network if problems arise.

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Network Configuration Changes

Never change network settings or passwords without proper authorization from the network administrator.

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Study Notes

Introduction

  • Wi-Fi (Wireless Local Area Network) links computers and devices like phones, TVs, and cameras, enhancing Railnet.
  • Railnet is the Indian Railways' enterprise network.
  • Wi-Fi is allowed as part of Railnet.
  • Railways provide Wi-Fi at stations via Railtel and other agencies.
  • Wi-Fi enables connection between networks or single devices (like CCTV cameras) where wired connection is impractical.

Technology

  • Wi-Fi uses radio frequency (RF) technology mostly at 2.4 GHz and 5 GHz.
  • Access points (APs) provide wireless network access, connecting to Railnet/internet.
  • APs combine router, switch, and wireless radio functions.
  • Wireless controllers manage access points, control RF power, and reduce interference.
  • Computers and laptops often have built-in Wi-Fi or an add-on adapter.

Wi-Fi in Offices/Residences

  • Wi-Fi is crucial for enterprise local area networks (LANs) and is permitted on Railnet.
  • Equipment supporting both 2.4 GHz and 5 GHz is used.
  • Security measures (SSID hiding, MAC filtering, strong passwords, WPA encryption, changing default IP address) are important to prevent unauthorized access.
  • Personnel Wi-Fi access points (WPA-2 security) are either personal equipment or service setups managed centrally (with UPS, PoE, and identical SSIDs for easy roaming).

Fault Diagnosis

  • Hardware diagnostics are available via visual indicators.
  • Software (firmware upgrades) can improve functionality.
  • Media/channel testing tools aid in diagnostics.

Installation/Environment

  • Install Wi-Fi equipment in dust-free environments with an appropriate temperature.
  • Uninterruptible power supplies (UPS) increase equipment lifespan and uptime.
  • Electrical grounding is necessary within specified limits.

Maintenance Schedule

  • Clean equipment regularly to prevent issues.
  • Address all manufacturer-suggested maintenance steps.

Do's and Don'ts

  • Do's: Document configurations for easy retrieval, protect cables and ensure training and awareness.
  • Don'ts: Unauthorized changes to IP addressing, configurations, and passwords. Never use water for cleaning.

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Related Documents

Wi-Fi Network Technology PDF

Description

This quiz explores the fundamentals of Wi-Fi technology, its integration with Railnet, and its application in various environments such as railway stations and enterprise networks. Enhance your understanding of how Wi-Fi works, including its frequency ranges, equipment, and management systems.

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