When it is received at the other end it moves up through the layers. As it moves up each layer strips off its header information and uses it to perform some task.Figure 2 provides a representation of this.= FIGURE 2 =3.2 NETWORK ACCESS LAYERA) Network access layerThe network access layer is the bottom layer of the TCP/IP protocol stack. This layer provides the ability to transmit an IP datagram from one host to another host on the same physical network. To do this the network access layer must be aware of the details of the network hardware on which it is running. This also means that for each different type of networking hardware there must be a different network access layer.This is the layer that is responsible for translating an Internet address into a hardware address. The process will be discussed further in a later section.3.3 THE INTERNET LAYERA) Internet layerThe Internet layer consists of two protocols IP, the Internet protocol and ICMP, the Internet control message protocol. IP is central to the TCP/IP protocol suite. All information being sent via TCP/IP must use IP. IP performs the following tasksdefines the size and the format of the datagram to be transmitted,The size of the datagram depends on the type of network hardware being used. Different types of hardware can handle different size datagrams. IP will create datagrams using the MTU, maximum transmission unit for the hardware.defines the Internet addressing scheme,The header for every IP datagram will contain two IP addresses. The source IP address and the destination.moves data between the network access layer and the transport layerroutes datagrams for remote machine,fragments and re-assembles datagramsICMP performs a number of control, error reporting and information functions .* example of network access layer packet being given to IP3.4 TRANSPORT LAYERA) Transport layerThe transport layer's two major protocols are ;Transmission Control Protocol, TCPA reliable con...
