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What are OSI and DoD models of network communications?

October 31st, 2009

The OSI Model

The International Organization for Standardization (ISO) developed the Open Systems Interconnection (OSI) reference model in 1977. The OSI model is a conceptual framework that can be used to get a better understanding of the complex interactions taking place among the various devices in a network. The purpose of the OSI model is to demonstrate how the network entities should work together for communication.

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Posted in A+, A+2006, CCENT, CCNA, MCSA, MCSA 2000, MCSE, Network+

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Detecting and Preventing Social Engineering and other Hacking Processes

August 31st, 2009

Social engineering attacks are growing fast, and today majority of attackers use social engineering techniques to infiltrate into a victim’s network. It is very difficult for a technician to identify social engineering attacks, as these attacks do not involve any technical tools or any software-coding program. A social engineering hacker attempts to persuade users to provide information that will enable him to use their computers or computer resources. Many technicians think that such attacks are a cause of concern only for large organizations. It used to be the case earlier, but now hackers target all sectors.

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Posted in A+, A+2006, MCSA, MCSA 2000, MCSA 2000 Security, MCSA 2003 Security, MCSE, MCSE 2000, MCSE 2000 Security, MCSE 2003 Security, Security+

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What is the Task Manager utility?

August 27th, 2009

Task Manager is a utility that is used for managing applications, processes, and the general system performance and also for viewing the networking and user statistics. The Task Manager utility is used to run or end programs or applications. Administrators use this tool to quickly identify and terminate a rogue application.

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Posted in A+, A+ 2009, A+2006, MCDBA, MCP, MCSA, MCSA 2000, MCSA 2000 Messaging, MCSA 2000 Security, MCSA 2000 to 2003, MCSA 2003 Messaging, MCSA 2003 Security, MCSA to MCSE-2003, MCSE, MCSE 2000, MCSE 2000 Messaging, MCSE 2000 Security, MCSE 2003 Messaging, MCSE 2003 Security, MCSE-NT to 2003

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What is GPMC tool?

August 26th, 2009

The Group Policy Management Console (GPMC) is a tool for managing group policies in Windows Server 2003. It provides administrators a single consolidated environment for working on group policy-related tasks. GPMC provides a single interface with drag-and-drop functionality to allow an administrator to manage group policy settings across multiple sites, domains, or even forests. GPMC is used to back up, restore, import, and copy group policy objects. It also provides a reporting interface on how group policy objects (GPOs) have been deployed.

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Posted in A+, A+2006, MCDBA, MCP, MCSA, MCSA 2000, MCSA 2000 Messaging, MCSA 2000 Security, MCSA 2003 Messaging, MCSA 2003 Security, MCSE, MCSE 2000, MCSE 2000 Security, MCSE 2003 Messaging, MCSE 2003 Security, MCSE-NT to 2003

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Partitions and File Systems

August 23rd, 2009

Partitions

A partition is a logical section of a hard disk drive. Creating a partition on a hard disk drive enables the hard disk drive to support separate file systems. Partitions can either be primary or extended. A hard disk drive can be divided into multiple logical partitions. However, it is recommended to have as few partitions as possible.

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Posted in A+, A+ 2009, A+2006, MCSA, MCSA 2000, MCSE

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Storage Devices and Media

August 22nd, 2009

A storage medium is an important part of a computer. Storage media contains data that are being accessed by users and is used to save data. It also saves files that a computer needs to operate. Storage devices and media come in different technologies, sizes, capacities, etc.

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Posted in A+, A+2006, MCSA, MCSA 2000, MCSE

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What is Simple Mail Transfer Protocol (SMTP)?

August 4th, 2009

Simple Mail Transfer Protocol (SMTP) is a protocol used for sending e-mail messages between servers. It is mostly used to send messages from a mail client such as Microsoft Outlook to a mail server. Most of the e-mail systems that send mails over the Internet use SMTP to send messages from one server to another. Due to its limitations in queuing messages at the receiving end, it is generally used with either the POP3 or IMAP protocol, which enables a user to save and download messages from the server.

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Posted in A+, A+ 2009, A+2006, 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, MCSA, MCSA 2000, MCSA 2000 Messaging, MCSA 2003 Messaging, MCSE, MCSE 2000, MCSE 2000 Messaging, MCSE 2003 Messaging, MCTS .NET 2.0, MCTS .NET Distributed, MCTS .NET Web, MCTS .NET Windows, MCTS Microsoft Visual Studio 2008

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Network topology

July 7th, 2009

The network topology is the pattern in which the network medium is connected to the computers and other networking components. The following are the major topologies associated with local area networking:

  • Bus topology: Bus topology is a type of physical network design where all computers in the network are connected through a single coaxial cable known as a bus. This topology uses minimum cabling and is therefore the simplest and least expensive topology for small networks. In this topology, 50-ohm terminators terminate both ends of the network. A Bus topology network is difficult to troubleshoot, as a break or problem at any point along the cable can cause the entire network to go down.

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Posted in A+, A+2006, MCSA, MCSA 2000, MCSE, Network+

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What is the Task Manager utility?

July 2nd, 2009

Task Manager is a utility that is used for managing applications, processes, and the general system performance and also for viewing the networking and user statistics. The Task Manager utility is used to run or end programs or applications. Administrators use this tool to quickly identify and terminate a rogue application.

This is a preview of What is the Task Manager utility?. Read the full post (343 words, 1 image, estimated 1:22 mins reading time)
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Posted in A+, A+ 2009, A+2006, MCDBA, MCP, MCSA, MCSA 2000, MCSA 2000 Messaging, MCSA 2000 Security, MCSA 2000 to 2003, MCSA 2003 Messaging, MCSA 2003 Security, MCSA to MCSE-2003, MCSE, MCSE 2000, MCSE 2000 Messaging, MCSE 2000 Security, MCSE 2003 Messaging, MCSE 2003 Security, MCSE-NT to 2003

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What is GPMC tool?

July 1st, 2009

The Group Policy Management Console (GPMC) is a tool for managing group policies in Windows Server 2003. It provides administrators a single consolidated environment for working on group policy-related tasks. GPMC provides a single interface with drag-and-drop functionality to allow an administrator to manage group policy settings across multiple sites, domains, or even forests. GPMC is used to back up, restore, import, and copy group policy objects. It also provides a reporting interface on how group policy objects (GPOs) have been deployed.

Permanent link to this post (322 words, estimated 1:17 mins reading time)
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Posted in A+, A+2006, MCDBA, MCP, MCSA, MCSA 2000, MCSA 2000 Messaging, MCSA 2000 Security, MCSA 2003 Messaging, MCSA 2003 Security, MCSE, MCSE 2000, MCSE 2000 Security, MCSE 2003 Messaging, MCSE 2003 Security, MCSE-NT to 2003

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