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This tutorial is the second part of the article. Once network layer’s header is removed, packet will become segment. This packing of data at each layer is known as data encapsulation (see Figure 2). If you like this article, please don’t forget to share it with friends through your favorite social site. The transport layer manages the host to host communication. A frame can have both a header and a trailer. Learn how data is encapsulated and de-encapsulated when it passes through the layers of OSI and TCP/IP models. In network layer, the data is known as packets. If frame is fine, it reads the destination hardware address of the frame to determine the fame is intended for it or not. We will also provide some examples of how frames are tunneled through the network while highlighting the differences between VXLAN and NVGRE. For example, header and trailer added by the transport layer in the sending computer can be removed only by the transport layer in the receiving computer. Likewise, in each layer, a corresponding Protocol Data Unit (PDU) is created. When the encapsulation process is completed, the frame is sent to the network. The difference between encapsulation and decapsulation is that, in encapsulation, the data is moving from upper layer to the lower layer, and  each layer includes a bundle of information called a header along with the actual data while in decapsulation, the data is moving from the lower layer to the upper layers, and each layer unpacks the corresponding headers to obtain the actual data. HTTP protocol uses a header with data. Now it is called a packet. The picture below is an example of a simple data transfer between 2 computers and shows how the data is encapsulated and decapsulated: The trailer contains information that is required to detect and drop corrupt data packages in the earliest stage of de-encapsulation. Encapsulation is a process to hide or protect a process from the possibility of outside interference or misuse of the system while simplifying the use of the system itself, also makes one type of network data packets to other data types. Decapsulation occurs in the destination computer. This tutorial is the first part of the article. In computer networking, encapsulation is a method of designing modular communication protocols in which logically separate functions in the network are abstracted from their underlying structures by inclusion or information hiding within higher level objects. This tutorial is the third part of the article. In the destination host, the frame is decapsulated in the reverse order till the application layer. The datagram enters the Network Access Layer, where software will interface with the physical network. In this layer, the packet came from the internet layer is given the source and destination MAC addresses. Users utilize mobile virtual clubby networks in. MAC address is the physical address. If frame is not intended for it, it will discard that frame immediately. In original TCP/IP model the term packet is mentioned as the term datagram. As shown in the figure below when Layer 1 takes the data and sends it to Layer 2. When it is sent to the network layer, it is a packet and has data, TCP/UDP header and header with IP address. It reads rest of the frame only if the frame is in correct shape. Updated on 2019-01-20 08:17:52 IST, ComputerNetworkingNotes It is called encapsulation. Data link layer, first, reads the trailer of frame to confirm that the received frame is in correct shape. It briefly explains the reasons why OSI model was created along with the advantages. The process of encapsulation and decapsulation. This process happens on the computer that is receiving data. Data Encapsulation and De-encapsulation Explained, We do not accept any kind of Guest Post. 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