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uCertify's Articles in Networks

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  • Network Media
    A communication between two computers is not possible without a transmission medium. There are different types of media, which have different properties, and the selection of media depends entirely on the needs, size, and environment of the network. The most commonly used transmission medium is copper and fiber optic wires, air, and radio waves. This section deals with different types of cables used to connect the computers in a network.
  • Network Protocols
    Protocol is a set of rules and conventions by which two computers pass messages across a network. Sets of standard protocols facilitate communication between the computers in a network having different types of hardware and software. Both the sender and the receiver computers must use exactly the same set of protocols in order to communicate with each other. A protocol can lay down the rules for the message format, timing, sequencing, and error handling.
  • TCP/IP addressing and subnetting a network
    A TCP/IP address, generally referred to as an IP address, consists of a thirty-two bit binary number that uniquely identifies a device on a TCP/IP network. It is logically divided into four groups and is presented in dotted binary notations. Each group contains eight bits (one byte) and every node on the TCP/IP network is assigned a unique TCP/IP number (IP address) for the identification of the node. Each IP address is separated internally into two parts: a network ID and a host ID.
  • Windows Server 2003 Active Directory and Network Infrastructure
    Windows Server 2003 Active Directory is a centralized database that stores the collection of information about all the resources available on the Windows Server 2003 domain. It is a hierarchical representation of all the objects and their attributes available on the network. It enables administrators to manage the network resources, i.e., computers, users, printers, shared folders, etc., in an easy way. The logical structure represented by Active Directory consists of forests, trees, domains, organizational units, and individual objects. This structure is completely independent from the physical structure of the network, and allows administrators to manage domains according to the organizational needs without bothering about the physical network structure.
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