Unit 5 assignment 1 P1 Describe Network Technology Network technologies are needed to create a network. They include network: Operating systems (OS) System working frameworks are the product that keep running on a server and permits the server to control the capacities in a system, for example, oversee information, clients, bunches, security, applications, and other systems administration capacities. For Example: Windows Linux OS X (SnowLeopard) Protocols A convention permits PCs to correspond with one another. It is a situated of standards, which are utilized by PCs to correspond with one another in a system, which must be comprehended, acknowledged and utilized for PCs to have the capacity to convey. It …show more content…
Bus Laid out in a line – Has a single cable connecting all of nodes. If one node breaks down the whole network breaks down Star All computers are connected to a hub, switch or router. Require more cabling, but failure of one node does not break down the network. Mesh Computers are connected to more than one computer – adv- if one breaks down the rest can still communicate.disad- lot of wires needed. Cabling For wired networks cables are needed. Wireless For wireless networks cables are not needed, signals are transmitted wirelessly. Devices Devices are needed to create a network and to run it affectively. For example, some common devices: Hub A network hub is a device which enables more than one computer to interconnect on a network. Router A router is a device that connects two networks – frequently over large distances. It understands one or more protocols. Switch A network switch is a small hardware device that joins multiple computers together within one LAN.
When using routers, you need many routers in order to route the information to the correct location, as one router will not be able to manage this task. Explain how the routing schemes handle this problem.
N.p., 7 Jan. 2005. Web. The Web. The Web. 16 Mar. 2014. The 'Standard' of the 'Standard'.
A Hub is a networking device that allows one to connect multiple PCs to a single network. Hubs may be based on Ethernet, Firewire, or USB connections. “A switch is a control unit that turns the flow of electricity on or off in a circuit. It may also be used to route information patterns in streaming electronic data sent over networks. “
Network computing was created in an effort to allow users of a computer application to share data more easily than using stand alone computers. Clients on a client/server network store their application data on a central server. There are two categories of clients on a network. They were originally categorized by their hardware design, but today clients are categorized by the software application design and where the bulk of the processing is done and where the bulk of the application software is stored.
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,
Ethernet cables or Unshielded Twisted Pair (UTP) cables usually connects Star topologies. The star is configured around a central wiring device or switching element, usually an intelligent hub. The hub interprets and routes electrical signals using a high-speed backplane or bus. Each device (workstation, server, etc.) is connected singly to a port on the hub. (Bloom, 1998). Star topologies can be expensive to install, however, quickly identified nodes on the network through the switches, or hubs, will drastically decrease downtime.
In most cases cable or DSL companies such as Comcast or DirectPC are just a single type of Internet connection company. But sometimes companies acquire these one-connection companies to make their companies bigger and better such as AOL buying Time Warner. As these companies get bigger and start to offer more types of connections they also start to have more security conflicts. AOL’s software for its dial up connection has a firewall built in to it, the firewall protects it users from hackers and unwanted programs from running. And the software works almost perfectly for keeping unwanted people or programs out, but the only catch is you have use their software. Road Runner, which is now part of AOL, is a cable company, which only provides high-speed Internet access, not full proof security. This problem leaves you open for hackers that are randomly barraging Internet connected PC’s with “pings” or “port scans”, probing to find unprotected PCs. Once found, a hacker can compromise your PC with a dangerous Internet threat such as a Trojan horse, spyware or even a malicious worm (Zone Labs).
Star topology networks require more cabling than bus, but the tradeoff comes in the form of a more solid network topology. A break in the network media will only affect a single node, since every node has a dedicated connection to the central device; a hub or switch. This also makes the central device a Single Point of Failure (SPOF). Redundant or failover switches are often used to eliminate the SPOF in a star LAN.
A network card is a piece of hardware which allows the computer to communicate with a network. Nowadays, there are rarely used because most computer come with them built in.
The definition of a switch or network switch is a small device that joins multiple computers together, working on layer two of the OSI, to form a local area network or LAN. Network switches are also known as smart hubs. Rather than simply dispersing the data evenly across a network the switch actually inspects the data packets for destination information, and then forwards the data to a specific location. By forwarding the data to its intended location bandwidth on the network is better controlled (Mitchell, 1999).
Now, when host 'A' tries to access a resource from host 'B' for the first time it will send a broadcast to every host on the network asking for host 'B' to tell it where it is at. All the rest of the hosts on the network will receive this broadcast, look at the request, and decide "He's not talking to me" and purge the request from its NIC memory buffer. Host 'B', however, will say "Oh, that's me!" and respond with it's MAC address. Host 'A' will then write that address into its address resolution protocol (ARP) cache, and from that point on when 'A' wants to talk to 'B', it will attempt to talk directly to 'B' by using its MAC address. If all your hosts are attached to hubs, you begin to run into a problem. Why? Because a hub broadcasts all information that it receives
Have you ever listened or sat in on a concept or network design meeting and been fed an alphabet soup of acronyms and words or technical jargon that just didn’t make sense to you? Well, the chances are that Ethernet, Token Ring, FDDI, and Wireless were among some of those being spoken.
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.
People in the present society have turned from the use of the old means of communication to the more advanced and technological ways of communicating. Technology has made it easier for people to communicate in a faster, efficient, and cost saving means through the introduction of the communication channels. The world has turned out to be the centre for technology with different technologies emerging daily as the people continue to develop from time to time to cope with the growing technology. The benefits of adopting the communication technology are explained in this article which shows why people do not function without technology.
It can also be an issue as the wiring can be expensive to buy and install and if the network is down, all computers would be out of use.