Theoretically Data Link Layer puts packet into frame by adding header and tail to the packet but how is it possible when you take into consideration CCSDS packet definition:
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A packet is a block of data with length that can vary between successive packets, ranging from 7 to 65,542 bytes, including the packet header.
Packetized data are transmitted via frames, which are fixed-length data blocks. The size of a frame, including frame header and control information, can range up to 2048 bytes.
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According to this, frame is smaller than packet, so how can you put packet into frame??
Telegrams are sent in data packets. Bits packet frame segment data mean data packet and they belongs to Data link layer. Bye.
Data, Segment, packet, frame, bit in that order
Packet
The Network layer (Layer 3, typically IP) will receive a segment from the Transport layer (Layer 4, typically TCP or UDP), and will add its own header to it to create a packet. The size of the packet will thus always be the size of the segment plus the Network layer header, the same as when the next layer down (the Data Link layer, layer 2, typically Ethernet) encapsulates the packet into a frame for transmission.
Packet
yes,data link layer finalize and frame a packet as frame is a series of bits that units a data.........
The FCS (Frame Check Sequence) Component of an ethernet frame permits the end recipient to check for, and correct, errors in the packet. It is a checksum that is checked against the packet for data integrity, to put it simply. When the number does not check out properly, the frame is thrown out and a replacement packet is requested.
Frames are encapsulating packets. The data link layer makes framing and provide this service to the layer above layer "the network layer".
An Ethernet frame typically has a maximum payload size of 1500 bytes, which includes the APR (Address Resolution Protocol) packet. The APR packet itself is relatively small, usually around 28 bytes, allowing the Ethernet frame to accommodate additional headers and trailers, such as the Ethernet header (14 bytes) and the Frame Check Sequence (4 bytes). Therefore, the total size of an Ethernet frame carrying an APR packet would be at least 64 bytes (minimum frame size) up to 1518 bytes (maximum frame size).
Frame relay.
Frames are encapsulating packets. The data link layer makes framing and provide this service to the layer above layer "the network layer".
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