Computer Communications & Networks Lab Report Example | Topics and Well Written Essays - 2000 words

Computer Communications & Networks - Lab Report mannequinThe devices are called end devices or more correctly hosts which are either the terminations or sources of information patrimonial via a network so accessing a network or site remotely involves three elements a source or sender, a destination and a forte which is the channel done which the entropy is transmitted. The data transmitted can be in the form of text, graphics, voice or video which are reborn into a language the computer understands called binary bits (data is transmitted as a zero or a one 0I). The bits are then programmed or coded into signals or data packets that can be transmitted through a medium over a network. Now sending data as one sustained stream will mean that no other data or devices can use the medium while the data is being transmitted just like a pipeline if it is delivering gasoline, it cannot at the very(prenominal) time deliver liquid petroleum gas so the data is broken into smaller packets a process called segmentation which allows many different data to be transmitted concurrently, this is called multiplexing and segmenting data enhances network dependableness so data is not lost easily whenever a break in communication occurs (third Symposium on Networked Systems design and Implementation (NSDI06), San Jose, California). ... The one used for internet communication is called TCP/IP stack which contains four layers Application protocols layer that is defined to applications like WWW, or FTP (File Transfer Protocol), a transmission control protocol which is responsible for directing packets of data to specific computers by using a port number. It also has an internet protocol layer that directs data bits to destinations using the IP addresses of the computers and a computer ironware layer that converts data into data streams or signals such as the network cards or modems. An didactics flows from the sender (computer) from the application to the transfer control pr otocol then to the internet protocol and finally to the hardware protocol that converts the bits of information into signals transmitted through a medium through the internet. On reaching the destination computer, the signals are converted back to binary bits through the hardware layer then to the internet protocol layer then to transfer protocol layer and then to the application such as a web server software. The internet is made up of many big networks called Network Service providers (NSPs0 affiliated together in a peer standard. The NSPs sub data packets with each other and must splice to three network access points (NAPs) and at metropolitan Area Exchanges (MAEs) both of which are called internet exchange points (IXs). Information is then sent around these networked computers to its destinations by routers which contain information tables and switch data packets to the amend destination (Serpanos and Wolf 292-302) As soon as one types the web address to be accessed into a w eb browser (a web browser is a program that is used for internet applications and