January 2018
Intermediate to advanced
524 pages
13h 33m
English
Content preview from Internet of Things for Architects
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Protocol summary and comparison
A summary and comparison of the various protocols is now given. It should be noted that there are exceptions to some of these categories. For example, while MQTT offers no built-in security provisioning, it can be layered at the application level. In all cases, there are exceptions and the table is built from the formal specifications:
|
MQTT |
MQTT-SN |
CoAP |
AMQP |
STOMP |
HTTP/RESTful |
|
|
Model |
MOM pub/sub |
MOM pub/sub |
RESTful |
MOM |
MOM |
RESTful |
|
Discovery protocol |
No |
Yes (via gateways) |
Yes |
No |
No |
Yes |
|
Resource demands |
Low |
Very Low |
Very Low |
High |
Medium |
Very High |
|
Header Size (bytes) |
2 |
2 |
4 |
8 |
8 |
8 |
|
Average power usage |
Lowest |
Low |
Medium |
High ... |
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.