iot data protocols

: { vector: {n1:1, n2:0, n3:1}, data: ‘fan‘ }When the system is read, the result should be ' fan '. N3 first sent a message to N2, updated as follows:n1: { vector: {n1:1, n2:0, n3:0}, data: ‘jian‘ }n2: { vector: {n1:1, n2:0, n3:1}, data: ‘fan‘ }n3: { vector: {n1:1, n2:0, n3:1}, data: ‘fan‘ }When N3 to send a message to

Computer network is more and more important in today's life, so we learn the network knowledge is very necessary. Network communication is divided into 5 layers, namely: physical layer, Data link layer, network layer, Transport layer, application layer.In the data link layer is responsible for the transmission of data, there are many kinds of

, such as transaction paymentsSeveral ways to submit data to the serverGet: Getting data from the serverGet/refresh.php?callback=c9507eab_1c64_4359_b8ab_8ba845dc8828bid=9a7d86667cb63acf13626750siteid= 1970055ucid=5568457t=1473068810144 http/1.1Host:p3.qiao.baidu.comuser-agent:mozilla/5.0 (Windows NT 6.1; WOW64; rv:48.0) gecko/20100101 firefox/48.0Accept: */*accept-language:zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.

The legendary WCF (1): Is this hard to learn?The legendary WCF (2): What about service agreements?Legendary WCF (3): multiple protocolsLegendary WCF (4): send and receive SOAP HeadersLegendary WCF (5): data protocols ()Legendary WCF (6): data protocols (B)Legendary WCF (7): "one-way" "two-way"Legendary WCF (8): Play w

TCP/IPA protocol is a complex set of protocols. There are many professional books. Here, I will only introduce the layer structure of TCP/IP protocol and its message format that are closely related to programming. We know that TCP/IP uses a layered structure. The hierarchical model and Protocol are as follows: Application Layer(Application) HTTP, telnet, FTP, SMTP, SNMP Transmission Layer(Transport) TCP and UDP Inter-

The data link layer has three main purposes: * Sends and accepts IP data packets for the IP module; * Send ARP requests to the ARP module and receive ARP responses; * Send RARP requests and RARP responses to RARP. The ARP protocol is mainly used to resolve the 32bit IP address to the MAC address (hardware address) corresponding to the 48bit (Ethernet ). The RARP protocol resolves the hardware address to