The Internet – Transport Control Protocol (TCP)
The Internet is an international network that links computers across the globe. Through the Internet, individuals can share data and communicate with each other from anywhere with an Internet service. You might be wondering what the Internet has to offer. Aside from communication, the Internet can help you find local businesses and sites. However, most people would want to know more about the uses of the Internet.
The Internet is made up of different components, including TCP/IP, URL, IP addresses, ICMP traffic, and various servers. TCP is a protocol, while IP is an IP address, and URL is the name of a website or computer. In simple terms, the Internet consists of IP packets that are sent from their destination to the receiver. Most often, an IP packet will contain data such as the destination site, ISP, time zone, header, and length. An example of a TCP packet is shown in Figure 1.
TCP/IP is one of the protocols that make up the Internet. The Internet might sound complex, but it actually contains one billion IP packets. Since there are so many IP packets passing through the network at any given time, it is not surprising that it takes some time for the data to get from point A to point B. This is why routers along with various other elements in the Internet work together in order to help ensure that the packets arrive at their correct destination.
The next component in the network is ISP. An ISP is the company that provides you with Internet access services. Usually, an ISP offers two kinds of Internet access services: dial-up and DSL. Dial-up Internet access requires you to use a modem or a phone line in order to connect to the internet. Because it uses a modem, it can take longer to send a request for data; hence the name “dial-up.” DSL Internet access on the other hand, uses a broadband connection that makes the exchange of information between you and the other party much simpler.
Network devices that are part of an IP network include routers, computers, and IP phones. The routers help individuals and organizations to establish a secure connection to the internet. In order to secure your IP address, the routers exchange data with certain standard servers known as IP telephones. The communication between the IP phones and the routers and IP telephones are performed through a process called packet switching.
packets are groups of data sent in packets. There are two layers in the packet transmission process: the TCP layer and the IP layer. The TCP layer makes sure that all data sent during a transaction is valid and will not be interrupted, and the IP layer ensures that only valid data is sent and received over an internet connection.