106 questions
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In what layer is GraphQL?
I've been learning about client server communication and read that according to OSI there are several layers where protocols are implemented. For example, TCP happens at layer 4 and HTTP at layer 7.
...
- 366
0
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1
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354
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How do I get complete Layer 2 -> Layer 7 data from a Python socket?
I'm trying to write a simple python server that accepts a connection from whatever and digests the entire frame, down to the ethernet headers. The server will not maintain a connection or care about ...
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0
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1
answer
315
views
Where is CanOpen in the OSI modell?
Its clear that the physical and data link is covered by CAN. But does all of the upper layers covered by CANopen? Should it cover all?
What confuses me more that there are sewveral CiA documents (such ...
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-1
votes
1
answer
193
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Beginner here unable to understand why Switch is layer 2
According to the OSI model, data is encapsulated from layer 7 down to layer 1.
Since normally a setup would be
PC(layer7, 6, 5, 4) > switch(layer 2) > Router(layer 3) > Modem(layer 1)
it ...
0
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1
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657
views
Network Packet Sniffer:Process an Ethernet frame (MAC src&dest address + protocole) using python
I am trying to simply get and process my ethernet frame in python to do it i wrotte this simple code in python (helped by a tutorial):
import socket
import struct
def ethernet_frame_fct(data):
...
- 878
-3
votes
1
answer
176
views
layers of the OSI model
I know this question may not make sense to many of you, but I still want to learn.
I want to know that when we want to send a message from one device to another device from another network, are all ...
0
votes
1
answer
254
views
Network Data Encapsulation Process
A question about how network data traverses through the internet.
I'm wondering whether the encapsulation/de-capsulation process happens at each hop while a request is being sent through the internet. ...
- 13
0
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1
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1k
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How to make HTTP request to a web server behind a Network Load Balancer (Layer 3)?
I was just going through some Udemy AWS exam questions. There was a use case where a consumer vpc wants to connect to a service provider VPC via a vpc endpoint service. Therefore, we must use a ...
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61
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At what point in the OSI Model stack would the Default Gateway MAC be added to the Frame - assuming an Ethernet network
Been Googling without success sadly.
As I understand it at the moment, data passes down the OSI Model from Transport into Network into Datalink, IP Header is added with the Source/Destination IP ...
0
votes
1
answer
279
views
TCP/IP and OSI in practice
I was studiyng those protocols, and I even understand the basis of each layer they have, but I can't understand how they work in practice.
For example: When an application make a request, isn't it the ...
-1
votes
1
answer
236
views
What exaclty is the job of the network layer in the OSI model
I am having a tough time understanding the network layer or layer 3 in the OSI model. Could anyone please help me with my questions
1)correct me if I am wrong, from my understanding the basic task of ...
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-2
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1
answer
2k
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Tracking OSI packets with Wireshark
All the 7 layers of the OSI model work together to define to the endpoint what is the type of machine he is dealing with.
But I wonder why can't I detect a OSI packet with an software like wireshark? ...
1
vote
1
answer
688
views
OSI Model Layer
If a server is indicating that it is accepting connections, via fping (IP address indicating "is alive") is this layer 7 Application in the OSI Model or is this a layer 3 Network?
At What ...
- 13
0
votes
2
answers
712
views
Why do we need both session layer if we have transport layer(in the osi model)?
If tcp in the transport layer creates for us a session , so why we need the session layer to create for us a session?
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30
votes
3
answers
16k
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Why do we need MAC addresses when you have local IP addresses
From what I understood, MAC addresses are physical addresses only used in LAN to identify a device.
However, local IP addresses can also identify a device on a local network as it is unique.
So why do ...
- 358