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 …

Cisco Systems, Inc. Default Description Cisco's hardware, software, and service offerings are used to ...

Cisco Systems, Inc. Default Description Cisco's hardware, software, and service offerings are used to ...

the blue boxs specifies the end device that have a fail sending pdu to another network (To ROUTER 1 or LAPTOP0) but from LAPTOP0 sending pdu to LAPTOP1 its succes. i dont have …

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 …

Layer 4 MSS - segment size - Transport Layer PDU. Layer 3 IP MTU - datagram size - Network layer PDU. Layer2 Interface MTU - Frame size - Data Link layer PDU. but this picture said a …

Thanks for the link Robert. It's becoming clearer now that I've read some of the responses, and if it were as simple as just adding a TTL field to prevent loops I'm sure someone would've …

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 …

I have found following figure in the TCP/IP Vol 1 book. So I tried to find described fields in IS-IS packet capture.But I can not find mentioned fields in the data link layer.But according to the …