The Active Directory data store, also referred to as directory, contains data on users, groups, computers, and on which resources these users, groups, and computers can access. It holds all Active Directory information. Each domain controller within a domain holds a readable/writable replica of the Active Directory data store that consists of information pertaining to the particular domain to which it belongs. Users and computers can continue to access the Active Directory data store when one domain controller in a domain is offline because they can use any other domain Read More

Understanding Exchange Server 2003 Data Storage Exchange Server 2003 uses the Extensible Storage Engine (ESE) database structure to store data. Data can be stored separately for messages and for transactions: Messages are stored in.edb and .stm database files. Database files also contain a number of other components, including: Rules Folders Attachments Indexes Transactions are stored in transaction log files. A message that is created is first written to log files before it is written to the database files. From the log files, the transactions are sequentially written to a numbered Read More

Predictive dialer software is designed to automatically dial the correct number of telephone calls to match the pattern of available call center personnel. Without predictive dialing software, an outbound call center will have to wait between phone calls until another person answers the phone. This can be quite expensive in terms of lost productivity. With a predictive dialer, a new phone call should be available as soon as the call center agent hangs up with the last phone call. Predictive dialer software accomplishes this by forecasting how many telephone calls Read More

What is AIM? AIM is AOL's version of instant messaging application and it allows users to communicate with each other in real time by way of text, voice, and video over the Internet. Features of AIM AIM also has certain features like: Chatroom messaging. Peer-to-peer file sharing with one's buddies. Storing your contact information on AOL's servers, which enables you to keep tabs on up to 1000 friends from any computer that has Internet access. Security Issues with AIM AIM has some serious security issues which have facilitated the creation Read More

An asteroid is a large chunk of matter made up of rock and/or metal that is either found within the Asteroid Belt between Mars and Jupiter or orbiting the solar system. They can range in size from the size of a particle of dust to many miles across; therefore, there are many different ways to classify an asteroid. However, when it comes to what their made of, there are only three ways to classify them and group them together. The first way which is the first material that they're made Read More

A galvanic isolator is any device that connects two circuits together without allowing electricity to flow directly from one circuit to the other. Instead of transferring electricity through direct contact, galvanic isolators use other means, such as electromagnetism, mechanical devices, optical systems, or acoustic systems to convert the electricity into another form of energy, transfer it to an output device, and then convert it back into electricity. There are many different types of galvanic isolators and they can be used in a wide variety of applications. How Galvanic Isolators Work Read More

DIN stands for ‘Deutsches Institut für Normung’ which means ‘German Institute of Standardization’. DIN develops norms and standards as a service to industry, to the state and to society as a whole. It is a registered non profit organization which has been based in Berlin since 1917. It consists of nearly 1,700 members who include individual companies, associations, public authorities, and other organizations from industry, commerce, the trades and research. DIN members support standardization through membership fees and play an active part in the decision making process. DIN develops standards Read More

PPP (Point-to-Point Protocol), is the most widely used method for transporting IP packets over a serial link between the user and the Internet Service Provider (ISP). Although PPP is primarily used over dialup lines, variants such as PPoE (PPP over Ethernet) and PPoA (PPP over ATM) extend PPP to new data-link layer protocols. PPP was designed to enable the transmission of different protocols over one point-to-point link by utilizing encapsulation. Encapsulation is the process of storing packets from the foreign protocol inside PPP frames. In addition to this encapsulation function, Read More