Posts Tagged ‘312-50’

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What is AutoFill?

September 29th, 2009

The AutoFill feature of a browser automatically fills the text in the text box as the user types. It does not suggest any options as done by the AutoComplete feature. The AutoFill feature can be set by the user of the browser and not by the author of the Web site.

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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 chage command?

September 10th, 2009

The chage command is used for changing user password expiry information.

Syntax:

chage [-m mindays] [-M maxdays] [-d lastday] [-E expireday] [-I inactive] [-W warndays] [-l] user

The functions of the switches are as follows:

Switch Meaning
-m Minimum number of days between each successive password change.
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Posted in Advanced Level Linux Professional (LPIC-2), CIW Professional, Junior Level Linux Professional (LPIC-1), Linux Professional, Master CIW Administrator, Master CIW Web Site Manager, UCP

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What is Diffie-Hellman encryption?

August 28th, 2009

The Diffie-Hellman encryption was developed by Diffie and Hellman in 1976 and published in the paper named “New Directions in Cryptography.” It is a key agreement protocol (also called exponential key agreement) that allows two users to exchange a secret key over an insecure medium (such as the Internet) without any prior secrets. The original protocol had two system parameters, p and g. They are both public and may be used by all the users in a system. The Diffie-Hellman key exchange was vulnerable to a man-in-the-middle attack, as Diffie-Hellman key exchange does not authenticate the participants.

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Posted in CIW Certified Security Analyst, CIW Professional, Master CIW Administrator, Master CIW Designer

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What is ad hoc network?

August 27th, 2009

Ad hoc is a basic topology of a wireless network. An ad hoc network consists of two or more wireless devices that communicate directly with each other. The wireless local area network (WLAN) network interface adapters in the wireless devices generate omni directional signals within a limited range called basic service area (BSA). When two wireless devices come within the range of each other, they immediately form a two-node network and are able to communicate with each other.

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Posted in MCDBA, MCP, MCSA 2000 to 2003, MCSA to MCSE-2003, MCSE, MCSE 2000, MCSE 2000 Security, MCSE 2003 Messaging, MCSE 2003 Security, MCSE-NT to 2003

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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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What is dictionary attack?

August 19th, 2009

Dictionary attack is a type of password guessing attack. This type of attack uses a dictionary of common words to find out the password of a user. It can also use common words in either upper or lower case to find a password. There are many programs available on the Internet to automate and execute dictionary attacks.

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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 WTLS?

August 19th, 2009

Wireless Transport Layer Security (WTLS) is a security layer of WAP, which is specifically designed for a wireless environment. It provides privacy, data integrity, and authentication for client-server communications over a wireless network. WTLS ensures that a client and server are authenticated so that wireless transactions remain secure and the connection is encrypted. WTLS is required because a wireless network does not provide end-to-end 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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What is AutoFill?

August 3rd, 2009

The AutoFill feature of a browser automatically fills the text in the text box as the user types. It does not suggest any options as done by the AutoComplete feature. The AutoFill feature can be set by the user of the browser and not by the author of the Web site.

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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 the Triple Data Encryption Algorithm (TDEA)?

August 2nd, 2009

The Triple Data Encryption Algorithm (TDEA) was proposed by Tuchman and first came into existence in functional applications in 1985. The Triple DEA algorithm uses three keys and executes the DES algorithm three times. It follows an encrypt-decrypt-encrypt (EDE) sequence as follows:

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Posted in MCP, MCPD, MCPD .NET 2.0 Enterprise developer, MCPD .NET 2.0 Web Developer, MCPD .NET 2.0 Windows Developer, MCPD Enterprise Applications Developer, MCPD Web Developer, MCPD Windows Developer, MCTS, MCTS .NET 2.0, MCTS .NET Distributed, MCTS .NET Web, MCTS .NET Windows, MCTS Microsoft Visual Studio 2008

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What is chage command?

July 17th, 2009

The chage command is used for changing user password expiry information.

Syntax:

chage [-m mindays] [-M maxdays] [-d lastday] [-E expireday] [-I inactive] [-W warndays] [-l] user

The functions of the switches are as follows:

Switch Meaning
-m Minimum number of days between each successive password change.
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Posted in Advanced Level Linux Professional (LPIC-2), CIW Professional, Junior Level Linux Professional (LPIC-1), Linux Professional, Master CIW Administrator, Master CIW Web Site Manager, UCP

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