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 …

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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 …

For the first PDU (ping) that didn't work, I'm thinking that you got a 'Success rate is 80 percent (4/5) ' message. That usually happens because of one of the devices along the route didn't …

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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But the main question is if the actual PDU is generated differently based on the layer the device is working at or is a complete layer 2 and layer 3 PDU generated? If a host was only concerned …

Nice chart, though I would update it to include the TCP/IP 5 Layer model as well. For anyone looking at the OSI model, the top 3 layers (layer 7, 6, 5) are mapped to the Application layer …

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.