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Explain about protocol data unitidentify PDU in each layer of OSI?

A Protocol Data Unit (PDU) is a unit of data specified in a protocol of a given layer of the OSI model. Each layer has its own PDU: at the Application layer, it's called a message; at the Transport layer, it's a segment (or datagram in UDP); at the Network layer, it's a packet; at the Data Link layer, it's a frame; and at the Physical layer, it's a bit or symbol. These PDUs help in managing and encapsulating data as it traverses through the layers of the OSI model.


What Protocol Data Unit is employed at the Transport Layer?

PACKETS


Term used for a data packet often implying a specific layer or protocol?

Protocol Data Unit (PDU)


Explain the difference between a PDU and a datagram?

A PDU (Protocol Data Unit) is defined by which layer it is in. In the physical layer and network layer, it is synonymous with the packet, in the data link layer, it is the frame. In the transport layer, it is a datagram for UDP. A datagram holds one or more PDU's, as it is the basic unit of transferring information via packet switching.


What is frame discuss its classification?

In the context of computer networking, a frame is a data unit transmitted over a computer network. Frames are classified based on the protocol layer they belong to, such as data link layer frames (e.g., Ethernet frames), network layer frames (e.g., IP packets), and transport layer frames (e.g., TCP segments). Each type of frame serves a specific purpose in transmitting and delivering data across the network.


What two ways can a unit of data be sent across a network?

1 tcp transmission control protocol 2 udp protocol


What is the general term used to describe a piece of data at any layer of a networking model?

Packet


The PDU at the Transport layer is called?

The PDU (protocol data unit) @ transport layer (e.g. TCP or UDP) is called as 'segment' .


What is a PDU?

In networking, PDU means "protocol data unit", and it is the generic name of the "packets" of data used at different levels of the network. Using the numbering of the OSI layers: At layer 2, the PDUs are called "frame". Example: An Ethernet frame, a frame-relay frame. At layer 3, the PDUs are called "packets". Example: An IP packet. At layer 4, the PDUs are called "segments". Example: A TCP segment, a UDP segment.


What is the data unit in TCP IP layer called?

Local Area Network


What is an application protocol data unit?

In the context of smart cards, an application protocol data unit is the communication unit between a smart card reader and a smart card. The structure of the APDU is defined by ISO/IEC 7816-4 Organization, security and commands for interchange.


What is the smallest unit of data transfer over a network?

The units that network traffic is sent in depends on the layer of the network you are talking about, and potentially on the technology being used.For example, Ethernet uses Frames.Internet Protocol (IP) uses Packets.Asynchronous Transfer Mode (ATM) uses Cells.