Department of Defense Network (DoD) Network Model Introduction Back in 1960, systems were primarily made up of mainframe computers, and were typically owned by fairly large companies and government institutions. Because mainframe computers run different proprietary software, and due to mainframes not being able to communicate between each other, special code (interface) had to be …
Planning the Test Network Environment Any successful network design deployment includes a testing strategy, and the execution of the testing plan. To test the network design, you have to plan the test network or environment, and then create the test network. A testing environment can contain one lab or multiple labs. You can build various …
Defining Network Infrastructure A network can be defined as the grouping of hardware devices and software components which are necessary to connect devices within the organization, and to connect the organization to other organizations and the Internet. Typical hardware components utilized in a networking environment are network interface cards, computers, routers, hubs, switches, printers, and …
Opening TCP ports in Windows may be necessary for certain applications to run correctly. Each application may require a specific port to operate on. While a computer can and does open ports on its own, it may have to be done manually in certain situations. Here is a simple procedure. Step 1. Launch Windows and …
A protocol is a collection of specifications or rules for data packets that enable information to be sent over the network. Network protocols are designed for network communication. In order to understand the different protocols available and their efficiencies, lets first look at the Open Systems Interconnection (OSI) reference model. This is the standard model …
Determining Information Flow Requirements To determine the information flow of the organization, you need to include a number of factors, of which the main ones are listed below. Accessing data or information should be one of the main concerns when planning the network design: The data that needs to be accessed by users. The location …
NetBIOS, broadcasts names to listening nodes on the network. NetBIOS utilizes a User Datagram Protocol (UDP) query to broadcast names. NetBIOS names identified computers on the network before the introduction of Windows 2000. The NetBIOS name is resolved to an IP address through Windows Internet Name Service (WINS), broadcasting, or the LMHOSTS file. If the …
Microsoft Model Overview Before Windows NT 3.1 was released, users had to obtain the TCP/IP protocol suite from a third party, and then install it. This was necessary for users to connect to the network, which in turn usually resulted in a number of issues. When it came to network communication, the TCP/IP software which …
Understanding the Function of Protocols Protocols are rules, standards and procedures that enable information to be communicated in the network environment. The rules and standards that control the way in which computers communicate are referred to as protocols. A few relevant factors to consider when discussing protocols and the network environment are: There are numerous …
Virtual Private Networks (VPNs) enable users to connect to a remote private network through the Internet. Virtual private networks therefore span the Internet because the user connects over the Internet to the remote VPN server. With a VPN, data is first encrypted and encapsulated before it is sent to the remote VPN server. When the …