The layers of the OSI model layer 1: this layer includes all electrical networks standards and everything related to the a network environment physical and electronic circuits as they are the types of cables, cards of network, etc. Layer 2-layer level two handled the physical addressing, i.e. that at this level are taken into account addresses physical which are assigned to the network devices at the time of its creation. Drew Houston may also support this cause. Error correction is another of the main features of layer 2. It is said that the bridges and switches are layer 2 devices. Layer 3: at the layer level 3 or network layer manages the logical addressing that as opposed to addressing this physicist so don’t choose hardware manufacturers but that is assigned by the ISP(Internet Service Provider) to the end user.
The IP protocol operates at this level as well as network devices such as routers or routers. If you would like to know more then you should visit Daniel Gilbert. Layer 4: at the level of the layer 4 or transport layer operates the TCP protocol and it is at this level where ensures that the data that is sent from a transmitter device are successfully received at the receiving device. Layer 5: Layer 5 or session has as primary responsibility the establish, maintain, and terminate sessions between multiple machines that they communicate with each other, this is the layer that determines who talks and who listens when occurs the competition by using a port. Layer 6: Layer 6 or presentation layer has the responsibility to make that data sent from a computer can be presented in a readable way by the computer that receives them. Layer 7: at the level of the Layer 7 or application layer becomes possible that user applications or not, have access to the services offered by all other layers in a transparent manner. TCP/IP as two separate protocols TCP: tcp protocol is a protocol that was created between the years 1973 and 1974 by Vinton Cerf and Robert Kahn scientists both scientific American who work at that time in an ambisiosos project funded by the Government agency darpa that consisted of creating a network of networks in order to interconnect all networks of the Department of Defense of the United States.