A PDU describes eveything that is happening at a particular layer. So, for example, at layer 3, you have all the data that was passed down from 7,6,5,4 then a new layer 3 header gets attached …

cisco IOS also have some commands that`s differentiated these 2 layers from each others but that`s beyond your question here . And one more complimentary question. It's said that MTU …

A PDU represents the bits that include the headers and trailers for that layer, as well as the encapsulated data. For example, an IP packet, as shown in Figure 1-14, using OSI …

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Hi! Here is a comment of Peter Paluch about it: As for datagram, this term has a much wider and less strict meaning. I personally consider the term "datagram" to stand for "message of a cert

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When creating a Simple PDU it sends back the "check" message to the source but just with the second time (or I'm not even sure if I understood that correctly). Devices are suppose to …

A layer 2 switch will not change the MAC address, it will filter, forward, or flood based off the information in the MAC address-table.

On receipt of an inferior BPDU from a designated bridge the switch send a RLQ PDU on all non-designated ports except the port where you received the inferior BPDU and self-looped ports. …