Found 23 entries

A little about VOIP
VOIP is an advanced technology that is used as one the modes of telecommunication. It has created its own space in the world of telecommunication. The ...

A+ Study Guide
Here are 449 questions and answers you may find useful in studying for your A+ examination. 1: 9 bit SIMMs have how many pins? A: 30 2: How m ...

Basics of Linux - the root directory
When you start working with Linux OS (operating system) and learning how to user Linux, you will soon discover that there are several Linux terms that ...

Cisco Router Configuration Basics
Note that this tutorial does not cover physically connecting the router to the networks it will be routing for. It covers operating system configur ...

Command Prompt Fun with Linux
When you enter a command in Linux, you type a command at a prompt and then press enter. Commands can be more than one word--some require switches (whi ...

How to change your Piczo password
After logging in to your Piczo account, follow these instructions: 1. Click Account 2. Click Account Settings 3. Click Edit button to right of ...

How to clean an LCD Screen
LCD screens, just like a common glass, are breakable. Can it ever be dust-free? Dust is the main culprit in many failures of electronic peripheral. ...

How to Use the Out of Office Assistant
How to Turn On the Out of Office Assistant 1. On the Tools menu, click Out of Office Assistant. 2. In the Out of Office Assistant dialog b ...

IEEE 802.11 Architecture
Each computer, mobile, portable or fixed, is referred to as a station in 802.11 [Wireless Local Area Networks]. The difference between a portable ...

IEEE 802.11 Standards
The most critical issue affecting WLAN demand has been limited throughput. The data rates supported by the original 802.11 standards are too slow t ...

Introduction to Linux
What is Linux? Linux is a free open source operating system originally developed by Linus Torvalds in the early 1990s. It was released as open ...

Introduction to Wireless LAN and IEEE 802.11
A wireless LAN (WLAN or WiFi) is a data transmission system designed to provide location-independent network access between computing devices by using ...

Linux Command History Feature
Bash remembers what commands you''ve recently entered so that you can recall and issue them again easily. If you press the up-arrow key, bash places t ...

Logoff or Shutdown Linux
logout at the command prompt exits your current user account and returns you to the log-in prompt. (The exit command does the same thing as logout. ...

Ten Commandments for C Programmers
1. Thou shalt run lint frequently and study its pronouncements with care, for verily its perception and judgement oft exceed thine. This is st ...

Types of VPN
Types of VPN Secure VPNs use cryptographic tunneling protocols to provide the intended confidentiality (blocking snooping and thus Packet sniffing) ...

Virtual Consoles in Linux
You can use virtual consoles to perform two activities in parallel. For example, I used one virtual console to write this section and another to test ...

What is computer networking?
A network is a collection of connected intelligent computing devices. The connection is not necessarily a fancy one. A connection between two computer ...

WiFi Security
Security is one of the first concerns of people deploying a Wireless LAN, the 802.11 committee has addressed the issue by providing what is called WEP ...

WiFi: A little about 802.11b
With 802.11b WLANs, mobile users can get Ethernet levels of performance, throughput, and availability. The basic architecture, features, and servic ...

WiFi: High Speed with 802.11a
802.11a, is much faster than 802.11b, with a 54Mbps maximum data rate operates in the 5GHz frequency range and allows eight simultaneous channels. ...

WiFi: The Data Link Layer
The data link layer within 802.11 consists of two sublayers: Logical Link Control (LLC) and Media Access Control (MAC). 802.11 uses the same 802.2 ...

WiFi: The Physical Layer
The three physical layers originally defined in 802.11 included two spread-spectrum radio techniques and a diffuse infrared specification. The rad ...