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What is Trojan horse?

August 19th, 2009

Trojan horse is a malicious software program code that masquerades itself as a normal program. When a Trojan horse program is run, its hidden code runs to destroy or scramble data on the hard disk. An example of a Trojan horse is a program that masquerades as a computer logon to retrieve user names and password information. The developer of a Trojan horse can use this information later to gain unauthorized access to computers. Trojan horses are normally spread by e-mail attachments. Unlike viruses, Trojan horses do not replicate themselves but only destroy information on hard disks.

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Posted in A+, A+ 2009, A+2006, CIW Associate, CIW Associate Design Specialist, CIW Certified Security Analyst, CIW Professional, MCSA, MCSA 2000, MCSE, Master CIW Administrator, Master CIW Designer, Master CIW Enterprise Developer, Master CIW Web Site Manager

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Image Formats

June 24th, 2009

There are two basic methods for a computer to render or to store and display an image. When an image is saved in a specific format, it is created in either a raster or vector graphic format.

The Internet users are mostly familiar with raster images. A raster format breaks an image into pixels.

This is a preview of Image Formats. Read the full post (671 words, estimated 2:41 mins reading time)
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Posted in CIW Associate, CIW Associate Design Specialist, CIW Certified Security Analyst, CIW Professional, Master CIW Administrator, Master CIW Designer, Master CIW Enterprise Developer, Master CIW Web Site Manager

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What is Trojan horse?

June 24th, 2009

Trojan horse is a malicious software program code that masquerades itself as a normal program. When a Trojan horse program is run, its hidden code runs to destroy or scramble data on the hard disk. An example of a Trojan horse is a program that masquerades as a computer logon to retrieve user names and password information. The developer of a Trojan horse can use this information later to gain unauthorized access to computers. Trojan horses are normally spread by e-mail attachments. Unlike viruses, Trojan horses do not replicate themselves but only destroy information on hard disks.

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Posted in A+, A+ 2009, A+2006, CIW Associate, CIW Associate Design Specialist, CIW Certified Security Analyst, CIW Professional, MCSA, MCSA 2000, MCSE, Master CIW Administrator, Master CIW Designer, Master CIW Enterprise Developer, Master CIW Web Site Manager

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What is virus?

June 20th, 2009

A virus is a malicious program. A computer virus passes from one computer to another in the same way as a biological virus passes from one person to another. Most viruses are written with a malicious intent, so that they can cause damage to programs and data in addition to spreading themselves. Viruses infect existing programs to alter the behavior of programs, actively destroy data, and perform actions on storage devices that render their stored data inaccessible.

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Posted in CIW Associate, CIW Associate Design Specialist, CIW Certified Security Analyst, CIW Professional, Master CIW Administrator, Master CIW Designer, Master CIW Enterprise Developer, Master CIW Web Site Manager

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What is DMZ?

June 20th, 2009

Demilitarized zone (DMZ) or perimeter network is a small network that lies in between the Internet and a private network. It is the boundary between the Internet and an internal network, usually a combination of firewalls and bastion hosts that are gateways between inside networks and outside networks. DMZ provides a large enterprise network or corporate network the ability to use the Internet while still maintaining its security.

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Posted in A+, A+ 2009, CIW Associate, CIW Associate Design Specialist, CIW Certified Security Analyst, CIW Professional, Master CIW Administrator, Master CIW Designer, Master CIW Enterprise Developer, Master CIW Web Site Manager

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Skills required for CIK-002.

June 19th, 2009

CompTIA has specified more than thirty objectives for the CIK-002 test, which are grouped under four topics. Following are some important areas in which an individual should possess good knowledge before taking the CIK-002 test:

  1. Identifying the issues that affect Internet site functionality, performance and security.
This is a preview of Skills required for CIK-002.. Read the full post (330 words, estimated 1:19 mins reading time)
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Posted in I-Net+

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What is SSL?

June 16th, 2009

Secure Sockets Layer (SSL) is a protocol used to transmit private documents via the Internet. SSL uses a combination of public key and symmetric encryption to provide communication privacy, authentication, and message integrity. Using the SSL protocol, clients and servers can communicate in a way that prevents eavesdropping and tampering of data on the Internet. Many Web sites use the SSL protocol to obtain confidential user information, such as credit card numbers. By convention, URLs that require an SSL connection start with https: instead of http:. By default, SSL uses port 443 for secured communication.

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Posted in Advanced Level Linux Professional (LPIC-2), Junior Level Linux Professional (LPIC-1), Linux Professional, UCP

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What is loopback address?

June 16th, 2009

The IP address 127.0.0.1 is known as the loopback address for a computer. This address is used with the PING command to test TCP/IP on a computer. It uses a loopback driver to reroute the outgoing packets back to the source computer.

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Posted in A+, A+ 2009, A+2006, CIW Associate, CIW Associate Design Specialist, CIW Certified Security Analyst, CIW Professional, MCSA, MCSA 2000, MCSE, Master CIW Administrator, Master CIW Designer, Master CIW Enterprise Developer, Master CIW Web Site Manager

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What is Digest authentication?

June 17th, 2007

Digest authentication is a secure authentication method in which passwords are sent across a network as a hash value rather than as clear text. It is a more secure authentication method as compared to Basic authentication. Digest authentication works across proxy servers and firewalls.

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Posted in A+, A+2006, CIW Associate, CIW Associate Design Specialist, CIW Certified Security Analyst, CIW Professional, MCSA, MCSA 2000, MCSE, Master CIW Administrator, Master CIW Designer, Master CIW Enterprise Developer, Master CIW Web Site Manager

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What is Integrated Windows authentication?

June 17th, 2007

Integrated Windows authentication is a method of authentication that uses the security features of Windows clients and servers. It is more secure than Basic or Digest authentication. Integrated Windows authentication relies on Internet Explorer and does not work over HTTP proxies. Therefore, it is best for use in intranets where all the clients are within a single domain.

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Posted in A+, A+2006, CIW Associate, CIW Associate Design Specialist, CIW Certified Security Analyst, CIW Professional, MCSA, MCSA 2000, MCSE, Master CIW Administrator, Master CIW Designer, Master CIW Enterprise Developer, Master CIW Web Site Manager

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