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  • Level: GCSE
  • Subject: ICT
  • Word count: 6539

Unit 23: Investigating Communications and Networks

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Introduction I intend to carry out my case study using my own knowledge and also gaining research from the internet and books from the library. I have provided some research on communications systems and network systems before I began my tasks. I obtained information about these from the internet and books from the Beauchamp library. Communication system: an assembly of equipment that allows data to be transferred between two or more places. Network systems: Below is a chart to show the speeds of technology and how good the connection speeds are for communication. This information was obtained from The Chart Technology Speed Wireless Range Support Cost Ethernet 10/100 100Mbs A A A A 802.11b 11Mbps Y B A B 802.11a 52/72 Mbps Y C B C Phone Line 2.0 10Mbps N A B B Gigabit Ethernet 1000Mbps N A D D 802.11g 22/54Mbps Y C N/A N/A Firewire 400Mbps N D C A Blue tooth 1.5Mbps Y D C C Homer 2.0 10Mbps Y B C C Power Line 14Mbps N A C C Chart Explanation - D is poor or inappropriate, A is best Range: In terms of a home network, will it cover the whole house? A D means short distances; an A means almost any home would be covered without additional equipment. Support: In terms of industry support for home networking ranging from drivers for different OS's, the availability of bridges and routers, and the support the industry has for using this technology as a home network solution. Cost: An A is the least expensive. This is the relative cost not just for the network adapters, but the relative cost of hubs, access points, repeaters, or other things needed for a complete home networking solution. Task 1 1. A comparison of peer-to-peer networks with client server networks. Peer to Peer Network This type of network consists of computers simply connected to each other by Ethernet cables. ...read more.


100BASE-T is based on the older Ethernet standard. Because it is 10 times faster than Ethernet, it is often referred to as Fast Ethernet. Like Ethernet, 100BASE-T is based on the CSMA/CD LAN access method. There are several different cabling schemes that can be used with 100BASE-T, including: * 100BASE-TX: two pairs of high-quality twisted-pair wires * 100BASE-T4: four pairs of normal-quality twisted-pair wires * 100BASE-FX: fibre optic cables TCP/IP - Transmission Control Protocol/Internet Protocol, the suite of communications protocols used to connect hosts on the Internet. TCP/IP uses several protocols, the two main ones being TCP and IP. TCP/IP is built into the UNIX operating system and is used by the Internet, making it the de facto standard for transmitting data over networks. Even network operating systems that have their own protocols, such as Netware, also support TCP/IP SPX - Sequenced Packet Exchange, a transport layer protocol (layer 4 of the OSI Model) used in Novell Netware networks. The SPX layer sits on top of the IPX layer (layer 3) and provides connection-oriented services between two nodes on the network. SPX is used primarily by client/server applications. Whereas the IPX protocol is similar to IP, SPX is similar to TCP. Together, therefore, IPX/SPX provides connection services similar to TCP/IP. Different types of Connector Connector Name Used for Description BNC Coaxial cable There are many different types of adapter which can be used for the BNC connector these include a barrel connector, terminator and a T-connector. ST connector Fibre optic cable It is similar to the BNC as it is as well barrel shaped. The connector is easy to connect in a small space as it has a square face. RJ45 connector CAT5E cable This connector looks like a standard telephone socket. The connector can only be inserted in one way into the slot. Task 2 Changing from standalone to networked computers will add new functionality to the system. ...read more.


It's also easier to add it to your SIG file or to write it on your business cards and print it on your business letters. Protection: Once you've registered your domain name, no one else can take your name and register it. You could use a Domain Name Query site to find out if your desired domain name is still available. Affordable: The registration of a .com domain cost less than �5 for one year nowadays. * More advantages o You can have your own access-logs on your server and analyse them easier and faster. o You can receive email at your domain name and have your own email addresses, like you@yourdomain.com or sales@yourdomain.com. A sub domain is an extension of your own domain, which can be mapped or pointed to a particular directory inside of your hosting account. For example, if your domain was yoursite.com: Forum.yoursite.com could point to yoursite.com/forum (this can be also accessed as www.forum.yoursite.com). Domain? Sub Domain? Which one would I choose if I was working at 'The Swan'? Having your own domain portrays a more professional image. When you register a domain name, you own it as long as you keep paying the name registration fees. If you decide to change web hosts, your name goes with you and your customers can still find you. A sub-domain is obviously cheaper and there are no name registration fees. Your web site is just as easily available as if you had your own domain. The sub-domain is a good solution for small businesses such as 'The Swan' that aren't sure if they need a domain or can't afford one. You can move up your own domain at any time. Task 4 The change from standalone to networked computers brings about a possible increased use of computers. This in turn brings about an increase in the health and safety risks. Write a memo to the Managing Director detailing the health and safety risks associated with computer use. ?? ?? ?? ?? Zain Sheikh Beauchamp College Centre Number - 25280 ...read more.

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