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Little about Organizational Units

January 26, 2011

An Overview of Organizational Units (OUs) An organizational unit (OU) is a container that is used to logically organize and group Active Directory objects within domains. OUs are not part of the DNS namespace. They are used to organize Active Directory objects into logical administrative groups. OUs therefore serve as containers in which you can [...]

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Little about Active Directry

January 26, 2011

What is an Active Directory and How Does It Work? An active directory is a service that is provided by Microsoft that stores information about items on a network so the information can be easily made available to specific users through a logon process and network administrators. By using an Active Directory it is possible [...]

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Basic things about Data Encryption

January 26, 2011

Please click on this link-  Little about Data Encryption

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Private and Public IP Addresses Explained

January 25, 2011

Public IP Addresses What is Public IP address Public IP Addresses (also known as Static IP Addresses) are IP addresses that are visible to the public.Because these ip addresses are public, they allow other people to know about and access your computer, like a Web server.In some cases, you do not want people to access [...]

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Cisco Layer 2 Switch Functions

January 25, 2011

Layer 2 switch is A network device that forwards traffic based on MAC layer (Ethernet or Token Ring) addresses. Bridging technology has been around since the 1980s (and maybe even earlier). Bridging involves segmentation of local-area networks (LANs) at the Layer 2 level. A multiport bridge typically learns about the Media Access Control (MAC) addresses [...]

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NetBEUI

January 24, 2011

NetBIOS, NetBEUI, and SMB are Microsoft Protocols used to support Microsoft Networking. The NetBIOS stack includes SMB, NetBIOS, and NetBEUI which are described in the table below. The following are parts of the Microsoft networking stack: Name Network Layer Description Redirector Application Directs requests for network resources to the appropriate server and makes network resources [...]

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Virtual Private Networking (VPN)

January 24, 2011

The most confusing part of VPN is that many acronyms show up. This is partly because VPN requires data encryption to be “private” and there are many encryption techniques and terms. Also there are many complicated security issues relating to VPN concerning encryption and user authentication. This section will first explain the concept and methodology [...]

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Internet Group Management Protocol (IGMP)

January 24, 2011

Internet Group Management Protocol (IGMP) is the protocol used to support multicasting. To use multicasting, a process on a host must be able to join and leave a group. A process is a user program that is using the network. Group access is identified by the group address and the interface (NIC). A host must [...]

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DNS Names in Windows Server 2003

January 21, 2011

Introduction to DNS Names The purpose of DNS is to provide a connection when we type a name.  Now that name could refer to a server, a host, a web site, or a UNC path.  Always remember that computers prefer to use an IP address and that the role of DNS is a database of [...]

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Access list types

January 21, 2011

There are three basic types of IP access lists: standard, extended, and dynamic extended. Standard access lists use source addressing for applying rules and provide very basic forms of filtering. Extended access lists use both source and destination addresses for filtering and even allow filtering by protocol type. This allows a more granular method of [...]

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10 things About Cisco Access list

January 21, 2011

What is an access control list? In the Cisco IOS, an access control list is a record that identifies and manages traffic. After identifying that traffic, an administrator can specify various events that can happen to that traffic. What’s the most common type of ACL? IP ACLs are the most popular type of access lists [...]

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Communication Devices in Computer Network

January 21, 2011

An electronic device that can send and receive data on the network is called the communication device. The communication devices are used on both ends of the connections. Most of the communication devices have the ability to convert the digital signal of computer into analog signal so that the signals can be transmitted on the [...]

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NAT and PAT Configuration on Cisco Router

January 18, 2011

There are two types of NAT that can be configured on a Cisco router; static, and dynamic. Static NAT Configuration: This type is used when you want to do one-to-one assignment of local IP addresses to global IP addresses. 1. Establish static translation between an inside local address and an inside global address, Router(config)#ip nat [...]

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10 importent show commands

January 18, 2011

The ‘show’ commands are the most widely used in Cisco routers. Here is a list of the 10 mostly used of these ‘show’ commands. 1. show running-config This command is your true best friend. It shows the complete configuration that is running currently. Using it you can troubleshoot almost all issues regarding routing, filtering, secure [...]

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