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?

Periodically change the passwords. Signup and view all the answers

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

Ensure the electrical earth meets required standards. Signup and view all the answers

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

Relocating wireless networking hardware Signup and view all the answers

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

Dynamic IP addressing Signup and view all the answers

What characteristic can enhance the capacity of a radio link?

MIMO (Multiple Input-Multiple Output) Signup and view all the answers

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

Configuring as extended service sets Signup and view all the answers

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

Environment where the access point operates Signup and view all the answers

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

To prevent unauthorized access Signup and view all the answers

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

20-25 users Signup and view all the answers

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

WPA-2 security Signup and view all the answers

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

Powering using PoE from the switch port Signup and view all the answers

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

MAC binding Signup and view all the answers

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

To facilitate smooth roaming for users Signup and view all the answers

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

Checking visual indications on the equipment Signup and view all the answers

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

Temperature maintained according to manufacturer specifications Signup and view all the answers

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

Uninterrupted Power Supply (UPS) Signup and view all the answers

How can software issues with managed equipment be addressed?

Through upgrading the firmware Signup and view all the answers

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

Configure WPA-2 security and consider MAC binding Signup and view all the answers

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

To link a group of computers and IP-enabled devices wirelessly. Signup and view all the answers

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

It connects to the wired network to enable wireless communication. Signup and view all the answers

What role do wireless controllers play in a WLAN?

They manage access points and optimize network performance. Signup and view all the answers

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

2.4 GHz and 5 GHz. Signup and view all the answers

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

It leads to a decrease in data each device can transmit. Signup and view all the answers

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

A wireless adapter. Signup and view all the answers

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

The signal strength increases and connection speed improves. Signup and view all the answers

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

CCTV cameras. Signup and view all the answers

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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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.