local area network (LAN)

See also Samples:

Virtual LAN
Linq reference and refer it using System. That said, that trick may not be appropriate for some purposes e. If a switch receives untagged frames on a trunkport, they are assumed to be part of the native vlan. Right-click on your network connection. The Internet as we know it today is not just You should rename it to GetRandomLocalIPv4 or always return array and leave it at caller's peril to use.

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Virtual Local Area Network VLAN Tutorial

Therefore, various specialists can read the network diagram without any discrepancies. Hotel Network Topology Diagram A network diagram represents the set of computers and network devices and the connections among them. This scheme can be developed for any institution or establishment. These diagrams depict access points, servers, workstations, firewalls and another equipment needed to provide a network. On this masterpiece drawing one will see a simple scheme a of connecting computers together.

Such form of connecting can be applied for a hotel, guest house, bungalow, hut or something else. This diagram shows the images of the real LAN components. So, it represents a physical category of a network construction. It looks similar to a star - so this network configuration is named a star topology.

The typical feature of this construction is a center point - usually it is hub, or router. The rays of this star means network connections. Computers, peripherals and other network details are placed on the ends of the star rays. Hotel Network Topology Diagram. Computer and Network Examples A Wireless network is a type of the computer network that uses the wireless connections for connecting network nodes for data transfer.

The wireless networks are very useful, inexpensive, popular and widely used. They are easy setup and do not require the cables installation. Computer and Network Examples. Block Diagram The vector stencils libraries: Use the libraries from the Block Diagrams solution to draw block diagrams for your business documents, presentations and websites in a few minutes.

Home area networks HAN. The home computers can be connected together by twisted pair or by a wireless network. HAN facilitates the communication and interoperability among digital devices at the home, allows to easier access to the entertainments and increase the productivity, organize the home security.

ConceptDraw has vector stencils in the 40 libraries that helps you to start using software for designing own Network Diagrams. You can use the appropriate stencils from Computer and Network Diagrams library with 56 objects. Computer and Networkfor Network Diagrams. Active Directory Diagram It's no secret that there is a list of skills that every average system administrator should have.

And it's important to be able to manage domains via active directory technologies. The best way to keep all the details in mind is to draw a diagram representing users, groups and domains. It can be helpful for system and network administrators to organize a network physical and logical elements domains, data bases, servers, network equipment, end-user computers etc.

The logical structure of Active Directory is a hierarchical organization of all network components. The data that is stored in Active Directory comes from some diverse sources. It shows allocating group policies and functions assigned to end users. It helps to plan, manage and maintain the certain user access scenario.

Star Network Topology Nodes of any computer network are somehow organized in a hierarchy or a layout. Some of the common layouts like star network topology are more reliable and some like ring topology withstand high loads better. This will provide internet access to every computer that is connected to your LAN. You can skip this if you're setting up a LAN without internet access. You don't need a router at all to create a LAN, but it makes things easier.

If you just use a network switch, you'll need to manually assign IP addresses to each computer after connecting them. Connect the switch to a LAN port on the router. If you're using a network switch to connect more computers, connect it to one of the LAN ports on the router. You can use any open port on the switch to make the connection.

When connected, the router will provide IP addresses for every computer that is connected to either device. Find the Ethernet port on your PC. You can usually find this on the back of your desktop tower, or along the side or back of a laptop. Slim laptops may not have an Ethernet port, in which case you'll need to either use a USB Ethernet adapter or connect wirelessly if your router allows it. Plug one end of an Ethernet cable into your computer.

Plug the other end of the cable into an open LAN port. Test out your network router only. If you're using a router, your work is complete. Once all of the computers are connected to a LAN port, they will be assigned IPs automatically and will appear on the network. If you're using a switch and no router, you'll still need to assign IP addresses to each computer. Enable file and printer sharing.

You won't be able to access resources on a networked computer until file and printer sharing is enabled. You can select specific files, folders, and drives to share on each computer , as well as share access to printers. Right-click on your network connection. You'll see this in your System Tray. If you are connecting your computers through a switch with no router, you'll need to assign each computer on the network its own individual IP address.

This process is handled automatically if you're using a router. Think of an IP address as a mailing address. Each computer on the network needs a unique IP address so that information sent across the network reaches the correct destination.

Click Open Network and Sharing Center. Click the Ethernet link at the top of the window. You'll see this next to "Connections. Make sure you don't uncheck it, just highlight it.

Click the Use the following IP address radio button. This will save the settings for that computer. This computer is now configured on your network with a unique IP address. Since Ethernet is the most widely used hardware scheme, we will focus our attention on it. Ethernet is available from several different computer vendors, and it is relatively inexpensive. In order to build an Ethernet hub you need the following: Also make sure that the hardware of choice is compatible with the Red Hat Linux operating system.

You can usually save money by purchasing LAN cards as a package vs. When choosing an Ethernet hub ensure that it contains at least as many ports as there are computers that will participate in the LAN.

It is always best to choose a hub with additional ports to allow for expansion. Assuming that all computers in the LAN will be running the Red Hat Linux operating system, a router will be required that can be configured using a Linux configuration program such as LinuxConf.

Finally, choose network cables to allow for expansion. It's always a good idea to purchase cables that are 1 or 2 times longer than the required length in case the structure topology of the LAN changes in the future. Installing the hardware Assuming that all LAN hardware is available, the next step is to install it.

First turn off all the computers that will participate in the LAN. Next, open the case on each computer and install each NIC in the appropriate slot on the motherboard, being careful to follow the manufacturer's instructions.

Find a convenient but safe location for the Ethernet hub, preferably a centralized location in the same building or room along with the computers. Next, run the cable from the NIC in each computer to the Ethernet hub ensuring all cables are out of the way of users who will need physical access to each computer in the LAN.

Moreover, make sure you follow all instructions provided with the LAN hardware before starting up any of the computers that will participate in the LAN.

If you are using a router to connect the LAN to the Internet or using a DHCP server, you will need to do some configuration as required by the user's manual. Lastly, assuming all computers are attached to the Ethernet hub via the NIC and a specific port on the hub, you can now begin the software configuration process using the Red Hat operating system.

If you installed the LAN hardware before installing Red Hat you will be prompted for network configuration during the Red Hat installation process.

However, if you installed the Red Hat OS after the LAN hardware, a program called "Kudzu" will detect the newly installed Ethernet card and initiate the configuration process automatically. Follow these steps when configuring each Ethernet card using the "Kudzu" program:. At this point, the bootup process should continue normally and you will be required to log on to the computer as the root user. You should have been given the opportunity to create a root account during the initial installation of Red Hat.

When the LinuxConf application is displayed, follow the steps below to configure the Ethernet card:. Nameserver specification Another important step in setting up LAN is to configure the Nameserver specification, which is used by Linux to look up IP addresses when only the computer's hostname is given. Hostname search path The hostname search path is used by Red Hat Linux to search for IP addresses assigned to hostnames.

In a DNS configuration the hostnames and IP addresses should already be listed in a pre-existing nameserver. On the other hand, if there is a centralized nameserver, as with small LANs, a host file will need to be configured on each computer that was assigned a hostname, IP address, and any aliases. The local host name should appear as localhost. Finally, you can save all changes and exit the LinuxConf application by following the steps below:.

Repeat for every host Now that you have configured one computer in you LAN, you will need to go back and repeat all the above steps for each computer starting with the section "Configuring the LAN". Lastly, make sure that the local computer and its associated IP address are listed twice and all the other computers in the LAN are listed only once. To test the completely configured LAN, make sure that the computers are able to communicate with each other after the bootup process.

You can start by typing reboot at the command prompt at a command terminal on each computer. This allows you to monitor the testing information that scrolls down the screen as a standard procedure during the Linux boot process. Look for the following information:. The Setting hostname field should display the hostname that you assigned for this computer.

The lo and eth0 interfaces should display [OK] to indicate that both tests were successful. To determine whether each computer can communicate with every other computer in the LAN, use the ping command.

Introduction to TCP/IP