Relationship between lans and wans the internet

What is the difference between a LAN, a MAN, and a WAN?

relationship between lans and wans the internet

Internet is a communication protocol for worldwide network (WAN = Wide Area Network). Devices are managed through this network on the. What's the difference between LAN and WAN? more of their constituent LANs to be connected over the public Internet or via a private connection established. A LAN (local area network) is a group of computers and network devices connected The Internet is an example of a worldwide public WAN.

These devices use the destination host address, in conjunction with information about the network interconnections, to determine the path that messages should take through the network. Processes running on the intermediary network devices perform these functions: Regenerate and retransmit data signals Maintain information about which pathways exist through the network and internetwork Notify other devices of errors and communication failures Direct data along alternate pathways when there is a link failure Classify and direct messages according to QoS priorities Permit or deny the flow of data, based on security settings Network Media 1.

The medium provides the channel over which the message travels from source to destination. Modern networks primarily use the following three types of media to interconnect devices and to provide the pathway over which data can be transmitted: Metallic wires within cables Glass or plastic fibers fiber-optic cable Wireless transmission Figure Network Media The signal encoding that must occur for the message to be transmitted is different for each media type.

On metallic wires, the data is encoded into electrical impulses that match specific patterns.

What Makes LAN Different from WAN? - Cisco & Cisco Network Hardware News and Technology

Fiber-optic transmissions rely on pulses of light, within either infrared or visible light ranges. In wireless transmission, patterns of electromagnetic waves depict the various bit values. Different types of network media have different features and benefits. Not all network media types have the same characteristics or are appropriate for the same purpose. The criteria for choosing network media are The distance the media can successfully carry a signal The environment in which the media is to be installed The amount of data and the speed at which it must be transmitted The cost of the media and installation Network Representations 1.

A diagram provides an easy way to understand the way the devices in a large network are connected. Such a diagram uses symbols to represent the different devices and connections that make up a network. Like any other language, the language of networking uses a common set of symbols to represent the different end devices, network devices, and media, as shown in Figure The ability to recognize the logical representations of the physical networking components is critical to being able to visualize the organization and operation of a network.

relationship between lans and wans the internet

Throughout this course and its accompanying labs, you will learn both how these devices operate and how to perform basic configuration tasks on these devices. Figure Network Representations In addition to being able to recognize these representations, you need to understand the specialized terminology that is used when discussing how each of these devices and media connect to each other.

Important terms to remember are Network interface card NIC: Provides the physical connection to the network at the PC or other host device.

What is the difference between Internet and Ethernet, between LAN and WAN? | Amphenol Socapex

A connector or outlet on a networking device where the media is connected to a host or other networking device. Specialized ports on an internetworking device that connect to individual networks. Because routers are used to interconnect networks, the ports on a router are referred to as network interfaces. A topology diagram provides a visual map of how the network is connected.

There are two types of topology diagrams: Identifies the physical location of intermediary devices, configured ports, and cable installation, as shown on the left in Figure Identifies devices, ports, and the IP addressing scheme, as shown on the right in Figure Network Component Representations and Functions Go to the online course to perform this practice activity.

Types of Networks 1. A network infrastructure that provides access to users and end devices in a small geographical area. A network infrastructure that provides access to other networks over a wide geographical area. MANs are typically operated by a single entity, such as a large organization. Similar to a LAN but wirelessly interconnects users and endpoints in a small geographical area. A network infrastructure designed to support file servers and provide data storage, retrieval, and replication.

It involves high-end servers, multiple disk arrays called blocksand Fibre Channel interconnection technology. Specific features of LANs include LANs interconnect end devices in a limited area such as a home, school, office building, or campus.

A LAN is usually administered by a single organization or individual.

relationship between lans and wans the internet

The administrative control that governs the security and access control policies is enforced on the network level. LANs provide high-speed bandwidth to internal end devices and intermediary devices.

What Makes LAN Different from WAN?

WANs are usually administered by multiple service providers. This is done using the Internet. As shown in Figurethe Internet is a worldwide collection of interconnected networks internetworks or the Internet for shortcooperating with each other to exchange information using common standards. Through telephone wires, fiber-optic cables, wireless transmissions, and satellite links, Internet users can exchange information in a variety of forms.

relationship between lans and wans the internet

Ensuring effective communication across this diverse infrastructure requires the application of consistent and commonly recognized technologies and standards as well as the cooperation of many network administration agencies. There are organizations that have been developed for the purpose of helping to maintain structure and standardization of Internet protocols and processes.

Intranet and Extranet 1. An intranet is basically an internet that is usually only accessible from within the organization.

relationship between lans and wans the internet

A router is needed to route packets, delivered to the router by a switch, out of a network segment or LAN. The communications link is used as a carrier of these data packets to the destined LAN.

relationship between lans and wans the internet

Both are wireless based technologies. Wireless LANs, particularly in home networks, are peer to peer. Wireless switches and routers can be used to connect Wireless Network speed The network speed, the speed of which data packets are transported, is faster for a LAN than for a WAN.

The Ethernet cable is attached to the Network Interface Card to the port on a switch. Data can be shared because database files stored in the server are available to users around the network; data from CD-ROMs can also be shared across the network.

Central back-up can take place automatically at regular intervals. A user will usually be able to retrieve work that has been deleted by mistake.

Messages can be sent to people working at other computers on the network which can save time and paper. The web pages of information can be accessed only over the LAN.

Printing can be slow. Where a lot of workstations are served by only one or two printers, long print queues may develop. A virus can spread more easily. If a virus gets into one computer, it is likely to spread quickly across the network because it will get into the central backing store.