Internet Educational Tips
Thursday, April 10, 2008
TCP/IP
Every device, every computer, that is part of the Internet, is allocated an address, called an Internet address, or Internet protocol address (IP address). However, it isn’t like our home address or any thing because, as I mentioned in earlier post, computers only understand numbers. So the IP address ia a series of numbers.
The current protocol is called IPv4. Each IP address is actually just four number each ranging from 0 to 255 (each of which is called an “octet”) and separated by decimal points (called dots). IP addresses are, therefore in the format xxx.xxx.xxx.xxx where each xxx could be any number from 0 to 225. So an IP address could look something like 161.184.138.36. This address is essential during every exchange of data on the Internet, because it identifies the client computer (which makes the request, and to which the data must be sent) and the destination can happen on the Internet unless your computer is first assigned an IP address.
Say you have specified the IP address of a Web site you wish to access. A server usually has a static IP address. However, your home PC, if you are connecting to the Internet through a modem, is usually assigned a different IP address by the ISP each time you dial in. This IP address is unique to you as a user, but only for as long as the session lasts. The reason for this system is that ISPs have to deal with a large number of requests at the same time. Besides, at any given time, the number of users of the ISP server is limited. To assign permanent IP address to retail users wouldn’t really be required; instead, ISPs simply allot any IP address that is not being used at the time to each user who has just dialed in. This system enables the ISP to get along with fewer IP addresses for the number of users who are connected simultaneously.TCP breaks down and reassembles packets of data. IP ensures that the packets are sent to the right destination. The TCP/IP combination is used because the Internet is a “packet-switched” network. In a circuit- switched network, in contrast, once a connection is made, that specific part of the network is exclusively used only for that connection. “In a packed-switched network”. The connection between sender and the receiver is not single and unbroken. When information is sent, it is broken into small packets and sent over many different routes at the same time and then put together in order at the other end once the pockets of data reach the destination.
The current protocol is called IPv4. Each IP address is actually just four number each ranging from 0 to 255 (each of which is called an “octet”) and separated by decimal points (called dots). IP addresses are, therefore in the format xxx.xxx.xxx.xxx where each xxx could be any number from 0 to 225. So an IP address could look something like 161.184.138.36. This address is essential during every exchange of data on the Internet, because it identifies the client computer (which makes the request, and to which the data must be sent) and the destination can happen on the Internet unless your computer is first assigned an IP address.
Say you have specified the IP address of a Web site you wish to access. A server usually has a static IP address. However, your home PC, if you are connecting to the Internet through a modem, is usually assigned a different IP address by the ISP each time you dial in. This IP address is unique to you as a user, but only for as long as the session lasts. The reason for this system is that ISPs have to deal with a large number of requests at the same time. Besides, at any given time, the number of users of the ISP server is limited. To assign permanent IP address to retail users wouldn’t really be required; instead, ISPs simply allot any IP address that is not being used at the time to each user who has just dialed in. This system enables the ISP to get along with fewer IP addresses for the number of users who are connected simultaneously.TCP breaks down and reassembles packets of data. IP ensures that the packets are sent to the right destination. The TCP/IP combination is used because the Internet is a “packet-switched” network. In a circuit- switched network, in contrast, once a connection is made, that specific part of the network is exclusively used only for that connection. “In a packed-switched network”. The connection between sender and the receiver is not single and unbroken. When information is sent, it is broken into small packets and sent over many different routes at the same time and then put together in order at the other end once the pockets of data reach the destination.
Labels: IP Address, TCP/IP
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