In designing a network, it is essential to first determine the scope of the project by asking key questions that will aid in the design and build. Questions such as how many servers and computers will be connected, what is the intended purpose of the network, and how much money is available are basic questions that come immediately to mind. Other questions such as security considerations, and how will the physical architecture of the building affect the design are often ignored but are equally important to the success of the network. Once these questions have been answered, the process of network design can begin. As the design of the network affects both media choices and performance, it is crucial that a design which takes current needs into account, allows room for growth, and provides a proven path for upgradeability is chosen.
In determining the physical layout of the network, the decision of what type of cable to be used is also decided. When broken down to its simplest form, all types of cabling provide a medium across which network information can travel. The most popular types of network cabling in use today are Twisted-pair (TP) in both unshielded (UTP), and shielded (STP) varieties, and Fiber-optic cable. While the use of Coaxial cable has declined in the arena of Local Area Networking (LAN), it is still prominently featured by Cable Television firms, providing both Television, and Internet services.
While the electrical pulses that Twisted-pair wiring carries over a copper medium is different from the pulses of light carried by Fiber-optic over a glass medium, there are cabling characteristics that apply to both. Each cable has a Bandwidth rating, which specifies the amount of data the medium is rated to carr...
... middle of paper ...
...ectronic eavesdropping, as well as interference from fluorescent lighting, while Fiber-optic cable is not affected by either of these. Aside from eavesdropping, the equipment should be physically secure to prevent the casual user from being overly curious, as there are many credible stories of the evening janitor plugging in a vacuum cleaner, and bringing down an entire network. While this paper has focused on a wired network, based upon TP and Fiber-optic cabling, the presence of Wireless Networking in a business operation cannot be ignored. While wireless speeds are only at 11/54Mpbs, it does provide the convenience of un-tethered freedom for use in meetings. However, the use of Wi-Fi should be carefully considered, as it existence presents a significant security risk for any business, by extending the network beyond the physical constraints of the organization.
Meanwhile, the advent of early PC’s and the recognition of the value in networking devices together gave rise to Local Area Networks. These LAN’s were developed from a business customer perspective, which placed more emphasis on costs and ease of use over reliability. There were a number of different competing LAN technologies, two of the most common being Token Ring (IBM) and Ethernet (everyone else). The triumph of Ethernet in the marketplace, to the extent where it is included in every PC, game console and some refrigerators, provides a consistent and relatively inexpensive way to build internal networks with relative ease.
Devices are needed to create a network and to run it affectively. For example, some common devices:
Throughout the 1970s, concerted industry efforts at the federal, state and local levels resulted in continued lessening of cable restrictions. These changes, couples with cables pioneering to satellite communications technology, led to a pronounced growth of services to consumers and a substantial increase in cable subscribers.
The project team has identified several issues with the current network infrastructure. The first is the availability and cost of token ring hardware. Ethernet is the dominant network topology and is included on many devices at no cost. Equipment with token ring interfaces can be found but are much more expensive. Another problem is that the current hardware is about 10 years old and is experiencing increased maintenance costs. Another problem is that the majority of the existing cable plant does not meet minimal category 5 standards.
Cross-Linked: This term is used for cables that are cross-linked under heat and pressure for better insulation properties. The material is subjected to heat and pressure, and extruded
Network topologies have some advantages and some disadvantages as well. This essay discusses the main advantages and disadvantages of three of these main topology technologies, to mention, the ring, the bus, and the star, showing the associated wiring types for each one of these topologies.
4. Each computer is connected to a central point, this topology requires a great deal of cable in a large network installation and could cost a great deal of time and money for installation.
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.
A parallel link transmits several streams of data (representing particular bits of a stream of bytes) along multiple channels (wires, printed circuit tracks, optical fibres, etc.).
When the logical design of a network is planned, an engineer will generally map out the logical layout and addressing of the network. This allows the person to picture the topology of the network and the addressing scheme that will be used amongst the network devices. Information must be gathered about several important factors before the logical design of the network is started. For example, depending on the services that will be provided to users, you may need to analyze the possible traffic patterns that might result from your plan. Locate potential bottlenecks and, where possible, alleviate them by providing multiple paths to resources or by putting up servers that provide replicas of important data so that load balancing can be provided. You need to determine who the clients are and what their actual needs will be. Distinguish between novice and power users. The services that will be provided on the network should also be determined during the logical planning stage. They may be limited by a scope, s...
Everyday when ET returns from his classes to his apartment he eagerly yearns to throw himself on top his comfy chair and simply surf the internet at his own convenience. Unfortunately, ET is living with two other roommates that maliciously wish to use all of their bandwidth on a daily basis. Ah, the horror! Luckily, ET has pondered away during his free time of how to resolve this emerging conflict. He has carefully noted that his apartment contains three computers: two desktops and one laptop. After consulting with his trusty side-kick, Andy Chung or better known as Andy, both of them absolutely believe that the most optimal solution to this conflict is to purchase a router. However, during ET's brief time in researching about routers he has discovered that he could a) purchase a wired router or b) purchase a wireless router.
The first wavelength division multiplexing system combined two signals and was created 1985, modern systems can handle 160 signals. Telecommunications companies like this technique because they can easily upgrade there lines without having to overhaul the network backbone. It uses same idea of FDM but with fiber-optic cables. The line assigns each signal a particular wavelength.
In addressing the problem, the proposed research will use the case study method to examine the plan, design, and implementation of WLAN technologies at Berean. At present, the non-wireless local area network (LAN) technologies employed by Berean include 10/100BaseT Ethernet at each desktop. Ethernet ports at the desktop are switch connected to an Asynchronous Transfer Mode (ATM) T1 backbone. Berean¡¦s one remote facility connects to the network using switched Frame Relay services along with Internet Virtual Private Network (VPN) connections.
This proposal is for a small office that will have users who are connected by Wi-Fi or cable. The network will include devices and resources that is shared among all the users. The network will need to have security measures in place to protect the entire network and keep the wireless access secure and available only to employees of the company.
When electronic devices transfer information to another electronic device, the devices need to know when data flow is beginning and ending. This is done with signals for synchronization.i