Regarding Thread coap

[Alan Ajit]

Dear nordic,

I tested simple coap thread examples. it's work fine. I want to know some details regarding this. 

1. Is it possible to find IP address of all node in one network?(provision is help to find address it's ok any other way to find all nodes ip address?)

2.I am new in thread . I think this examples we provide default pan id and start network other has jin this network because they have this pan id configured defaulty. Is it right?

3. What additional security if one node joining in a network?

4. How  to implement security in thread networking(is it any document regarding this?)

5.Provisioning in this examples means only just find the IP address of server is it right(for proper working of coap client and coap server)?

[Marjeris Romero]

Hi Alan,

1. Yes, you can use the CLI example. Routers will be in the routing table, and it is possible to send a request about children for each router.

2. Yes, the examples come pre-commisioned with the same pan-id and network key.

3. & 4. Thread reuses 802.15.4 security. All messages inside the Thread Network are secured with a key derived from network credentials. The only unsecured messages are: Thread Network Discovery messages, and the initial communication between the Joiner and Joiner Router in the Thread commissioning process. To securily transmit information over unsecured link, a DTLS session is established (connection between Commisioner and Joiner). Maybe this whitepaper from the Thread group could be helpful to understand the security established in the commissioning process.

Best Regards,

Marjeris