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Initially, information security was tightly bound to physical security. The introduction of networked systems created a need for a new kind of security system. Not only must information be protected from improper physical access, it must also be protected from outside attackers using the very tools that make distributed computing …

The Open Systems Interconnection (OSI) Reference Model first came into being in 1978. The OSI group was intent on getting a model into the field quickly, so they elected to adopt a seven-layer model created by Charles Bachman of Honeywell. By this time, the lower four levels of the model …

Email communication has become so common, users often forget that there is no inherent security in the common implementation. For general correspondence it might be acceptable to forsake security in the interest of ease of use. After all, the sharing of recipes between old friends is not always a matter …

Today (Aug 28, 2009) is the big day for Mac OS X lovers. Snow Leopard has finally been released. If you were smart enough to pre-order it on Amazon then you'll be getting it soon. Not only that, but you saved \$4 off the list price!

On a related note …

A week after the official deadline for electronic submission of applications for the Broadband Initiatives Program (BIP) and the Broadband Technology Opportunities Program (BTOP), the National Telecommunications and Information Administration (NTIA) revealed today that nearly 2,200 applicants have requested \$28 billion in funding. The American Recovery and Reinvestment Act …

In the field of information technology, there are two kinds of professionals. Those that seek to make information more accessible through applications and services, and those that strive to protect that same information. Information security professionals protect information by first striving to identify the individuals access the system and then …

Documents how an active Windows SNMP Service can block a legacy Lotus Domino maintenance upgrade by locking the required library.

It can be said that security policies are living documents that must be frequently reviewed and revised. As organizations evolve, their security needs evolve as well. Policies written before the evolution of the organization may not adequately reflect newly developed needs. Therefore, it should be considered standard procedure to review …

No matter how small, all network installations go through an initial planning phase before implementation. The new network administrator must take many factors into consideration when planning a network. Most importantly, the administrator must understand the required capacity, compatibility, and flexibility of the new network. Gathering this information requires a …

Cisco ASA limits the number of concurrent remote-access VPN sessions a user can maintain. The default is three. When a user hits the limit, a new connection can fail or an existing idle session can be removed, depending on the configured limit and session state.

The CLI knob is still …

For the last couple of years, I've used the Tag Suggest Thing WordPress plugin to recommend tags for my posts based on the post content. Beginning with WordPress 2.5, that plugin started to have problems interacting with the WordPress administration pages. In August 2009, Yahoo! announced that they would …

There are a few network devices out there that allow you to connect, but don't give you an option to disconnect. For example, you might be stuck at a password prompt, but have no authentication details. Most telnet clients allow you to break these connections with the ^] (control-]) command. <acronym …

Good news today for service providers planning to file an electronic application for either the Broadband Initiatives Program (BIP) or Broadband Technology Opportunities Program (BTOP). The deadline for electronic applications has been extended from 5 p.m. ET on August 14, 2009 to 5 p.m. Eastern Time (ET) on …

The following resources were used in the writing of the Introduction to Database Systems article series:

• Bluttman, K. & Freeze, W. S. (2007). Access data analysis cookbook. Sebastopol, CA: O’Reilly.
• Churcher, C. (2007). Beginning database design: From novice to professional. Berkeley, CA: Apress.
• Farrell, J. (2008). Programming logic and design …

The following resources were used in the writing of the Introduction to Programming Concepts article series:

• Amma, P. (2005). Geo::PostalAddress - Country specific postal address parsing / formatting. Retrieved August 6, 2009.
• Farrell, J. (2008). Programming logic and design, comprehensive (5th ed.). Boston: Thomson Course Technology.
• Hotch, R. (1995). Accounting programs …