ThisbookstartsbyexploringthepopularHTTP,UPnP,CoAP,MQTT,andXMPPprotocols.Youwilllearnhowprotocolsandpatternscanputlimitationsonnetworktopologyandhowtheyaffectthedirectionofcommunicationandtheuseoffirewalls.Thingregistriesanddelegationoftrustareintroducedasimportanttoolstosecurethe