January 2018
Intermediate to advanced
524 pages
13h 33m
English
Content preview from Internet of Things for Architects
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CoAP architecture details
CoAP is based on the concept of mimicking and replacing heavy HTTP abilities and usage with a lightweight equivalent for the IoT. It is not an HTTP replacement as it does lack features; HTTP requires more powerful and service-orientated systems. CoAP features can be summarized as follows:
- HTTP-like
- Connection-less protocols
- Security through DTLS rather than TLS in a normal HTTP transmission
- Asynchronous message exchanges
- Lightweight design and resource requirements and low header overhead
- Support for URI and content-types
- Built upon UDP versus TCP/UDP for a normal HTTP session
- A stateless HTTP mapping allowing for proxies top bridge to HTTP sessions
CoAP has two basic layers:
- Request/Response layer: Responsible ...
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