The arguments in favor of the Internet sound, at a decade interval, like an echo of those that were previously formulated in praise of the Minitel. This passion for information technology is displayed in a context where ambitious growth rates are not physically sustainable, due to market saturation in rich countries, the progressive depletion of […]
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The modern monetary system freed itself of material support by replacing it with a generalized system of trust based on continuous growth. In the past, monetary creation was absolutely limited by the scarcity of materials to be exchanged or of precious metals for minting coins. Now, however, money liberated from a material basis, in particular […]
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How Legal Wire tapping Works
CALEA requires that communications providers allow law enforcement officials to be able to listen in on phone conversations and get information about those phone calls, but only when the law enforcement agency has gotten approval for the tap.
The law enforcement agency goes before a judge and presents reasons a wiretap is […]
Throughout the history of the United States, one of the greatest political tensions has been that which balances personal privacy against the need for law enforcement to protect individuals and the country as a whole.
That tension has been with us from the very earliest days of the Republic. The Founding Fathers were extremely cognizant of […]
How do we know if we have any rows in a table? We use the COUNT function to return a count of the number of rows in a table. If you enter Listing into Query Analyzer we can check the data insert for the Spy table.
This will return the current number of rows (well actually […]
The introduction of SQL Server 2000 enables us to have multiple instances of SQL Server running on a single machine. In the past we only had one instance of SQL Server, which in SQL Server 2000 is called the Default instance. Now we can have as many named instances as we want. Microsoft has tested […]
Indexes, like triggers, have always been a part of SQL Server but now we have even more features that we can take advantage of when creating indexes.
One of the biggest changes is allowing us to have an index on a computed column. A computed column is the answer from a sum. For example, consider a […]
SQL Server 2000 introduces the Copy Database Wizard and an enhanced version of the Index Tuning Wizard. Let’s take a look at both of these wizards, starting with the Index Tuning Wizard.
Tuning Indexes
The Index Tuning Wizard will assess your workload and give you suggestions for creating optimal indexes and statistics for your databases. The wizard […]
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Although the Internet protocol is the second component of the TCP/IP acronym, it is perhaps the more important of the two. IP is the basic protocol in the suite that provides the information used for getting packets from one place to another. IP provides a connectionless, unacknowledged network service, and also provides the addressing mechanism […]
IP addresses are divided into three major classes (A, B, and C) and two less familiar ones (D and E). Each class uses a different portion of the IP address bits to identify the network. There is a need for classifying networks because there is a need to be able to create networks of different […]
Although most people think of IP as the transport protocol used by higher-level protocols, one of its more important functions is to provide the address space used by the TCP/IP suite. The difficulty of having to create a routing table that consists of hundreds of millions of actual hardware addresses, providing for no built-in organization […]
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Retrieving the Message Header and Body of the Message
Because IMAP must interact with SMTP, it recognizes the SMTP envelope, which consists of the header information and data stored in the email message. There are several states that the protocol goes through when interacting with the IMAP server.
The selected state means that a mailbox has been […]
Because it is usually implemented in a read-only memory (ROM) chip, the BOOTP protocol client is a simple, concise bit of code. The exchange of UDP messages between the client and the BOOTP server consists of a series of requests and replies. The same packet format is used for both types of messages with an […]
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