Problems arose when these proprietary networks needed to communicate to another workstation outside of their network. Later in the 1980’s, LANs became more commonly used to connect workstations, but they tended to utilize proprietary rules of communication called protocols. Protocols such as Novell’s IPX/SPX, AppleTalk, and IBM and Microsoft’s NetBEUI were better for communication, but they still presented problems. Getting a PC to talk to a mainframe required specialized technologies that would turn a “smart” PC into a dumb terminal that could be permitted within the mainframe’s sphere of influence. Near the end of the 1980’s, network isolation became unacceptable.
Ethernet devices compete for access to the network using a protocol called Carrier Sense Multiple Access with Collision Detection (CSMA/CD). Token Ring & Fiber Distributed Data Interface (FDDI) Ethernet CSMA/CD networks provide a relatively simple way of passing data. However, many industry observers correctly note that CSMA/CD breaks down under the pressure exerted by many computers on a network segment. These observers are correct; the constant contention for bandwidth that is part and parcel of Ethernet does not always scale efficiently. In an attempt to circumvent this problem, IBM and the IEEE created another networking standard called 802.5.
VPN that utilizes the Internet avoids this problem by simply tapping into the geographically distributed access already available. Another way VPN reduces costs is by reducing the need for long-distance telephone charges for remote access. Instead of having the offsite team of a company dial into the corporate modem bank via long distance lines, the company’s VPN allows them to simply place local calls to the ISP’s POP in order to connect to the corporate network. Moreover, VPN allows the creation a secure private network over a public network such as the Internet. Although VPN is very popular in the market for networking technology, it may raise some concerns for IT managers.
Peer-to-Peer overlay networks such as Bittorrent and Avalanche are highly implemented on large files for higher performance in an transaction from the server to as many end-users. The core concept is that the files are splitted into equal size in order to be downloaded by the users from the host. However the performance haven’t reached the higher merits when compared to one system and the other new concept is that,analytical performance analysis based on the new uplink sharing version of broadcasting problem (Mundinger et al., 2008). Pure P2P architecture implement resource mediation ... ... middle of paper ... ...ent Delivery Networks (CCDN). In this paper, an efficient solution is provided for distributing content over multi-provider inter network environment.
In some cases, the internetworking equipments are used to accomplish both purposes at the same time. The development of internetworking equipments was largely influenced by the need to increased sharing of information across different networks despite of the manufacturer of the network. This need emerged from the increased dependence on computers and ... ... middle of paper ... ...es the addition of BayStack UPS45 to promote their reliability in light of power anomalies. BayStack UPS45 is manufactured by the firm to safeguard switches, hubs, routers, and Internet access devices from any power interruptions. The need to purchase the additional device is a disadvantage because of the extra costs associated with it.
Using Gigabit Ethernet in this way makes for an excellent low-cost connection to storage resources. Since many customers already have a Ethernet network in place the additional cost of the GSN capable switch is the only additional cost. Once the switch is attached to the SAN, the benefits of a SAN solution can be pushed out to more client computers in the company. Bibliography http://www.zdnet.com/eweek/reviews/1201/01gig.html#Reference http://www.iol.unh.edu/consortiums/ge/index.html http://www.cisco.com/warp/public/729/gigabit/index.shtml
These systems usually do not exceed 16 processors. (Image courtesy of Sequent Manufacturing) The most common uses of these types of systems are commercial servers of web applications such used in on line commerce. The advantages of this particular configuration are that they can be easily upgraded by the addition of more processors. These processors are available to execute any of the given processes as soon as the operating system recognizes and configures the new hardware. However, the limitations of such a configuration are that with shared memory, there is a strong emphasis on data manipulation.
(www.iptel.org), 2004. The business benefits of this type of infrastructure are increased productivity, grater business flexibility and reduced operational costs. (www.cisco.com),2004 Trends in IP Telephony IP telephony is the technology for transmitting voice communications over a network using IP open standards and it uses a single network for the transmission of data, voice and video. There are currently many devices which use similar technologies to accomplish this tasks. Companies in today’s economy are looking for ways to reduce the cost of doing business and IP telephony provide this opportunity.
Switches, which are layer 2 devices, use decision based routing by storing NIC hardware addresses and port numbers on a table in the switch. By doing this, when data is received by the switch, it knows where the source was, and where the data needs to go. This allows for faster data transmission for all NICS that are connected, because it uses the swi... ... middle of paper ... ... mining tools are being used to uncover the congestion that slows network traffic down. With all these DSS type applications working together in harmony, the internet can be faster and safer to surf, than ever before. Sources Fairhurst, Gorry.
Also, each of the technologies has advantages depending on the needs of a network. Along with advantages comes the disadvantages, some technologies offer limited advantages when compared with others. Understanding different networking technologies is vital for anyone planning to work in the IT field. Mesh, Bus, Ring, and Star Topologies The first type of topology to be discussed is the mesh topology. Mesh topologies involve the connection of all computers together on a network through cables.