Introduction
A Wide Area Network is geographically dispersed telecommunication network. The term distinguishes a broader telecommunication structure from a local area network. Wide area network may be privately owned or rented, but the term usually connotes the inclusion of public network. An intermediate form of network in terms of geography is a metropolitan area network. WAN is communication network that are regional or worldwide in geographic area, with a minimum distance typical of that between major metropolitan area. Smaller network include metropolitan and local area network. A communication network provide common transmission, and switching functions that enable user to transport data between many source and many destination. Under ideal circumstances, the data that arrive at the destination are identical to the data that were sent. The rate of arrival of the bits at any point in the network is said to be the data rate at that point and it is typically measured in bits per second. These bits may come from one source or from a multiple of source. The capacity of a network to transmit at a certain data rate is known as its bandwidth.
Figure 1 : The MESH connectivity of a WAN.
A typical network is shown in the figure above. WAN are commonly use the MESH connectivity network. The characteristic of the transmission facility lead to an emphasis on efficiency of communication technique in the design of WANs. Controlling the volume of traffic and avoiding excessive delay is important. Since the topology of WANs are likely to be more complex than those of LANs, routing algorithm also receive more emphasis. Many WANs also implement sophisticated monitoring procedure to account for which user consume the network resource. This i...
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...ny different people have the ability to use the information from other computer.
• Messages can be sent quickly to other people on the network. These message are data, pictures, sounds, or video included with them called attachment. • Once set up, maintaining a network is a full-time job which requires network supervisors and technicians to be employed.
• Volunerable to hackers or other outside threats
Conclusion
Wide Area Network is a collection of computer and network resource connected via a network over a geographic area. WAN are commonly connected either through the Internet or special arrangement made with phone companies or other service provider. A WAN is different from a MAN because of the distance between each of the networks. In a WAN, one network may be anywhere from several hundred miles away, to across the globe in a different country.
... access to what and in which sequence. The router connects the LAN to other networks, which could be the Internet or another corporate network so that the LAN can exchange information with networks external to it. The most common LAN operating systems are Windows, Linux, and Novell. Each of these network operating systems supports TCP/IP as their default networking protocol. Ethernet is the dominant LAN standard at the physical network level, specifying the physical medium to carry signals between computers, access control rules, and a standardized set of bits used to carry data over the system. Originally, Ethernet supported a data transfer rate of 10 megabits per second (Mbps). Newer versions, such as Fast Ethernet and Gigabit Ethernet, support data transfer rates of 100 Mbps and 1 gigabits per second (Gbps), respectively, and are used in network backbones.
Wireless networks – While the term wireless network may technically be used to refer to any type of network that is wireless, the term is most commonly used to refer to a telecommunications network whose interconnection between nodes is implemented without the use of wires, such as a computer network. Wireless telecommunication networks are generally implemented with some type of remote information transmission system that uses electromagnetic waves, such as radio waves, for the carrier and this implementation usually takes place at the physical level or “layer” network.
In conclusion, a local area network is made up of computers and a myriad of devices, such as routers, servers, switches, and firewalls. In order for it to connect to the Internet, a router must be installed. Servers provide special functions such as printing, file sharing, etc. Switches connect the computers together from different parts of the network. Firewalls prevent unauthorized access. There are a host of other devices that may be used as well. These devices are hubs, gateways, repeaters, wireless access points,
Perhaps the most redundant, fault-tolerant of all network topologies is the mesh LAN. Each node is connected to every other node for a true point-to-point connection between every device on the network.
n.a. - n.a. - n.a. - n.a. - n.a. - A+E Networks. 2009. The 'Standard' of the 'Standard'. Web. The Web.
Wang, Y., Wang, Z., (1999). Explicit routing algorithms for internet traffic engineering. Computer Communications and Networks. pp.582 – 588. DOI: 10.1109/ICCCN.1999.805577
Instant messages (IM) short form refers to the transfer of messages between users in near real time. These instant messages are usually but not required to be short. Instant messages are often used in a conversational mode that is, the transfer of messages back and forth is fast enough for participants to maintain an interactive conversation (Campbell,et, al: 2002). Generally the messages that are exchanged are not stored, but this not also is the case. Instant messages differ from email in common usage in that; instant messages are usually grouped together into brief live conversations, consisting of numerous small messages sent back and forth.
Networks are designed in a number of ways, based on the geographical area, the technology used, user group specific, application based etc. But we can roughly categorize the communication networks in 2 broad categories, based on transmission: Connection-Oriented and Connectionless.
4. To communicate with other computers, either one at a time (Instant message) or many at once (chat rooms or discussion groups).
So first and foremost we need to fully understand what is a network? A computer network is composed of multiple connected computers that communicate over a wired or wireless medium to share data and other resources. For instance, a home computer network may consist of two or more computers that share files and a printer using the network. The size and scalability of any computer network are determined both by the physical medium of communication and by the software controlling the communication. (Wikipedia, the free encyclopedia (2007) Computer network. Retrieved September 25, 2007 from (http://en.wikipedia.org/wiki/Computer_network) Ok so then what is a Network System Administrator?.It is defined best by the U.S Department of Labor: Network administrators design, install...
Mesh networks are reliable, stable, and redundant. If a node can no longer operate, all the others are not affected as they can still communicate either directly or through one or more intermediate nodes. Mesh networks can be very expensive due to the large amount of cable and connections required. Bus Topology Bus topology refers to a local area network (LAN) arrangement where each node or device is connected to a main cable or link called a bus. The bus network is simple yet very reliable.
Local Area Networks also called LANs have been a major player in industrialization of computers. In the past 20 or so years the worlds industry has be invaded with new computer technology. It has made such an impact on the way we do business that it has become essential with an ever-growing need for improvement. LANs give an employer the ability to share information between computers with a simple relatively inexpensive system of network cards and software. It also lets the user or users share hardware such as Printers and scanners. The speed of access between the computers is lighting fast because the data has a short distance to cover. In most cases a LAN only occupies one or a group of buildings located next to each other. For larger area need there are several other types of networks such as the Internet.
Wireless local area networks (WLANs) have the potential to improve the flexibility, productivity, and the quality of work life of an enterprise (Sage Research Staff, 2001). Berean Institute is a typical two year college with about a staff of sixty eight employees and 250 students per semester. Berean teaches cosmetology, barbering and the latest software and hardware technology, which is located in Philadelphia, Pennsylvania. Berean currently has two locations in the Philadelphia area and using a Local Area Network (LAN).
An Analysis of the Internet The internet can be defined as a “network of networks”. A single network consists of two or more computers that are connected to share information. The internet connects thousands of these networks so all of the information can be exchanged worldwide. Connections are typically made through a modem, a device that allows computers to exchange and transmit information through telephone lines. A modem takes digital information and passes it through a series of steps to convert it to analogue signals or sound waves that can be passed over a telephone line.
Due to the demand for the internet to be fast, networks are designed for maximum speed, rather than to be secure or track users (“Interpol” par. 1). The adage of the adage.... ... middle of paper ... ...