computer

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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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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Address Resolution Protocol

January 24, 2011

ARP and RARP Address Translation Address Resolution Protocol (ARP) provides a completely different function to the network than Reverse Address Resolution Protocol (RARP). ARP is used to resolve the ethernet address of a NIC from an IP address in order to construct an ethernet packet around an IP data packet. This must happen in order [...]

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Again Domain Name Service (DNS)

January 24, 2011

Host Names Domain Name Service (DNS) is the service used to convert human readable names of hosts to IP addresses. Host names are not case sensitive and can contain alphabetic or numeric letters or the hyphen. Avoid the underscore. A fully qualified domain name (FQDN) consists of the host name plus domain name as in [...]

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Little about DHCP

January 24, 2011

Dynamic Host Configuration Protocol (DHCP) This protocol is used to assign IP addresses to hosts or workstations on the network. Usually a DHCP server on the network performs this function. Basically it “leases” out address for specific times to the various hosts. If a host does not use a given address for some period of [...]

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Little about DNS Zones in Windows Server 2003

January 21, 2011

When you plan a DNS installation, be sure that you choose the most suitable type of zone.  For instance, if your goal is to install a Windows Server 2003 domain, then investigate Active Directory Integrated Zones.  Also decide how many zones to configure, it is easy to focus on the forward lookup zone, but overlook [...]

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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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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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Little about ISO/OSI layers

January 18, 2011

If you want to remember the sequence of the OSI layers model name then the following two sentences can help you a lot for this purpose.“All People Seems To Need Data Processing”. Open Systems Interconnection (OSI) model is developed by ISO (International organization for standardization) in 1984. OSI reference model is a logical framework for [...]

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What is Network Routing ?

January 18, 2011

Routing is the process of defining routes for the packets to its destination through an internetwork and this is performed by the router. Routing is consist of two separate tasks. 1. Defining paths for the packets through and internetwork. 2. Forwarding data packets based on their predefined paths. Generally, there are two types of routing. [...]

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What is ISDN

January 18, 2011

The regular phone line which is used at home and offices is an analogue phone line. Your voice is picked up by telephone mouthpiece and then sent down the phone line as an analogue wave. Regular modem converts the digital signals of the computer into the analogue waves, which then travels on the regular phone [...]

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Little about Ethernet

January 18, 2011

The IEEE standards have been developed by the International Standards Organization (ISO). The Institute of Electrical and Electronic Engineers (IEEE) in 1985 produced a series of standards for the Local Area Networks, which are called IEEE 802 standards. These standards have been accepted widely throughout the IT world. One of the IEEE 802 standards, the [...]

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Little about Computer Network Topology

January 18, 2011

In Computer Networking “topology” refers to the layout or design of the connected devices. Network Topologies can be physical or logical. In this section I will illustrate on the different types of the topologies. Computer network topologies can be categorized in the following categories. • bus • star • ring • mesh • Tree. Hybrid [...]

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