Wireless Ad-Hoc Networks an Intro Wireless mobile ad-hoc network (MANET) technology is designed for the establishment of a network anywhere and anytime, without any fixed infrastructure to support the mobility of the users in the network. In other words, a wireless ad-hoc network is a collection of mobile nodes with a dynamic network infrastructure forming a temporary network. Such networks no central [...]
A Centralized VOIP Network also known as GCPs: Gateway Control Protocols Media Gateway Control Protocol (MGCP) and H.248/MEGACO Network Elements Media Gateway Controller(MGC): also known as Call Agent or Softswitch, it controls a number of dumb terminals and Media Gateways. The MGC receives signaling information from MG and can instruct it to alert the called [...]
A Peer-to-Peer VOIP Network also known as SIP SIP or Network Elements User Agents: A software program installed in a user’s terminal or an IP phone to initiate and terminate phone calls, plus data and video communications. There are two logic parts in the user agents: User Agent Server (UAS) and User Agent Client (UAC). [...]
Nano technology – An Intro The prefix “nano” means one billionth. One nanometer (abbreviated as 1 nm) is 1/1,000,000,000 of a meter, which is close to 1/1,000,000,000 of a yard. To get a sense of the nano scale, a human hair measures 50,000 nanometers across, a bacterial cell measures a few hundred nanometers across, and [...]
List of Cyber crime in today’s Internet Information Technology Criminal activities that are perpetrated using communication networks such as the Internet, telephone, wireless, satellite, and mobile networks are known as cyber crimes. The following are types of cyber crime: Cyberterrorism: Refers to premeditated attacks on computers and computer networks with an intention to cause harm or further social, ideological, religious, political, [...]
Classification of Wi-Fi Networks Wi-Fi networks use the IEEE (Institute of Electrical and Electronics Engineers) 802.11 family of standards to define the radio frequencies, data formats, and other technical details that are necessary to establish a wireless LAN. Today, there are four types of 802.11 networks, as shown Type Maximum Speed Maximum Range (outdoors) Radio [...]
DES – Data Encryption Standard The DES algorithm is a careful and complex combination of two fundamental building blocks of encryption: substitution and transposition. The algorithm derives its strength from repeated application of these two techniques, one on top of the other, for a total of 16 cycles. The sheer complexity of tracing a single [...]
What is Wireless Fidelity Wi-Fi and how it Works Wireless networks use a technology that is specified within a standard called 802.11. The standard is basically written documents formed by members of the IEEE. These documents help manufacturers develop wireless products so that they will work together with wireless products from every vendor that follows [...]
Bascially what is Android OS by Google Android is a comprehensive open source platform designed for mobile devices. It is championed by Google and owned by Open Handset Alliance. The goal of the alliance is to “accelerate innovation in mobile and offer consumers a richer, less expensive, and better mobile experience.” Android is the vehicle [...]
ADSL – Asynchronous Digital Subscriber Line ADSL (Asynchronous Digital Subscriber Line), a variant of DSL (Digital Subscriber Line), that gives you up to 128 times the bandwidth of standard dial-up access and is run via your ordinary telephone line. A drawback with ADSL is that it only works within a distance of about 5 to [...]