What is the difference between datagram and packet

Packet vs Frame 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: " A packet is a block of data with length that can vary between successive packets, ranging from 7 to 65, 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 bytes.

Could anyone explain this to me? How terms segment,packet,datagram and frame are used in OSI model? Re: Datagram vs Packet, Packet vs Frame 14 years 5 months ago Hello Asesino and welcome to the forum. I would recommend this book, its fantastic. Then i started getting further confussed as i read more.

I would recommend that everyone gets the book highlighted above, its not exactly a book that you would read cover to cover unless you really wanted to , however its a fantastic reference book. Wayne Murphy Firewall. I think you can view the book online free of charge but i like to have it to hand in hard copy, well worth the money. I also have that book. I have not really used it yet.

And, I agree that it would be hard to read cover to cover. I think it's around 1, pages. I like to know I have it for reference if I need it. Good suggestion. Let's get back to the topic. Basicly name "datagram" is reserved for connectionless protocols.

So it match UDP. Change Language. Related Articles. Table of Contents. Save Article. Improve Article. Like Article.

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Virtual Circuit is the connection oriented service in which there is a implementation of resources like buffers, CPU, bandwidth, etc.