It translates private IP addresses to routable public IP addresses before sending it out to the internet. It also takes a public IP address that comes in and changes it to the private IP address, sending it where it needs to go. Because you are connected to a single line, I will be using overload NAT with PAT (Port Address Translation). It translates many inside address to a single public IP address using the hosts port number (Network Address Translation (NAT)
when someone types www.microsoft.com, the website is associated to Microsoft server so the website is delivered to your computer screen. The Intranet Server The intranet server is similar to the internet server as it delivers WebPages to computers however it is for LAN (local area networks). This means the pages are private and run through localised cabling. The WebPages are not available to computers outside the LAN and dial up connections are not enabled. Organisation the internet and intranet Internets are organised by numerous internet servers connected through a permanent broadband connection.
Type netstat -r at the command prompt to see the ip of all computers you are connected to In MSN (and other programs) when you are chatting to someone everything you type goes through the MSN servers first (they act as a proxy) so you see their ip rather than who you are chatting to. You can get round this by sending them a file as MSN doesn't send file through its proxy. When you type the netstat -r (or -a for a different view) the ip's are under the foreign address table. The ports are separated by a : . Different programs use different ports, so you can work out which ip's are from which program.
For example, your Internet server provider may provide you with a PPP connection so that the provider's server can respond to your requests, pass them on to the Internet, and forward your requested Internet responses back to you. PPP uses the Internet protocol and is designed to handle others. It is sometimes considered a member of the TCP/IP suite of protocols. Relative to the OSI reference model, PPP provides layer 2 (data-link layer) service. Essentially, it packages your computer's TCP/IP packets and forwards them to the server where they can actually be put on the Internet.
These packets travel over many different routes between the computer that it is being sent from to the computer to which it is being sent to. Phone lines, either fibre-optics or copper wires ones, carry most of the data packets. Internet computers along the path switch each packet that will take it to its destination, but no two packets need to follow the same path. The Internet is designed so that packets always take the best available route at the time they are travelling. 'Routers' which are boxes of circuit boards and microchips, which do the essential task of directing and redirecting packets along the network.
According to the Center for Democracy and Technology (CDT), any web site can find out whose server and the location of the server a person used to get on the Internet, whether his computer is Windows or DOS based, and also the Internet browser that was used. This is the only information that can be taken legally. However, it can safely be assumed that in some cases much more data is actually taken (1). These are just a few of the many ways for people to find out the identity of an individu... ... middle of paper ... ... to the FBI (Rothfeder, "November 1996 Feature" 4). CONCLUSION Security for the Internet is improving, it is just that the usage of the Internet is growing much faster.
The gateway to the Internet from your home computer is through an ISP. To get to the Internet through an ISP you have to have a modem dialup, ISDN (Integrated Services Digital Network), DSL (Digital Subscriber Loop), cable modem, wireless, or leased line. These methods provide a variety of speeds to connect the Internet, without one of these methods you will not be able to connect to the Internet. Transmitting information using the Internet can be a little confusing to understand. As mentioned earlier, the Internet is a network of networks and there is a network protocol that allows computers electronically describe data (Scott's Newsletter).
The main function of the switch, router, gateways, or hubs is having the ability to process and forward data packets on the network. The creation and function is to ensure that each having their own unique functions and configurations which makes one a more viable optional choice over the next for ensuring data forwarding. For example, large networks will need routing protocols that will send the data packet to the intended destination and not broadcast it throughout the entire network. Gateways provide nodes with a contactless connection into the resources that are available for the users. The basic gateways that are installed in many pc are called NIC’s or network interface card (Andrews, 2006, pp.
The 5-4-3 rule -- which was created when Ethernet, 10Base5, and 10Base2 were the only types of Ethernet network available -- only applies to shared-access Ethernet backbones. A switched Ethernet network should be exempt from the 5-4-3 rule because each switch has a buffer to temporarily store data and all nodes can access a switched Ethernet LAN simultaneously. Hopefully this information will assist in starting your networks correctly.
crossover cable Similar to a null-modem cable, with the exception that the crossover cable is used for Ethernet connections DNS: Short for Domain Name System (or Service or Server), Short for digital nervous system, a term coined by Bill Gates to describe a network of personal computers that make it easier to obtain and understand information. Dongle: A device that attaches to a computer to control access to a particular application. Dongles provide the most effective means of copy protection. Typically, the dongle attaches to a PC's parallel port. On Macintoshes, the dongle sometimes attaches to the ADB port.