obd2 protocol

IntroductionHTTP is an object-oriented protocol belonging to the application layer, which is suitable for distributed hypermedia information System because of its simple and fast way. It was proposed in 1990, after several years of use and development, has been continuously improved and expanded. Currently used in the WWW is the sixth edition of Http/1.0, http/1.1 standardization work is in progress, and Http-ng (Next Generation of HTTP) has been prop

what is the HTTP protocol?HTTP is an abbreviation for the Hyper Text Transfer Protocol (Hypertext Transfer Protocol). Its development was the result of collaboration between the World Wide Web Association (Wide) and the Internet Working Group IETF (Internet Engineering Task Force), which eventually released a series of RFC,RFC 1945 defines the http/1.0 version. T

The difference between TCP protocol and UDP Protocol (RPM)First we find out that the TCP protocol and the UCP protocol and the TCP/IP protocol, many people confused, has always been the TCP/IP protocol and the difference between t

Part1. The most familiar strangersCompared with the TCP/UDP protocol, the HTTP protocol may be more familiar, as everyone can see the http://xxx.com word everywhere. But, reallyThe students who are aware of the HTTP protocol may be just a few, and many people don't even know what "404" means. And this article, it is to let everyone more in-depth understandingNext

Author: vamei Source: http://www.cnblogs.com/vamei welcome reprint, please also keep this statement. Thank you! The signal transmission must always meet certain requirements.Protocol). For example, the Great Wall is filled with Wolf smoke because the physical signal of the wolf smoke has been preset to represent the abstract signal of "enemy intrusion. Such a"Langyan = enemy intrusion"Is a simple protocol. The

If you are not a child of the School of network engineering, you have a blank understanding of network. I have heard of TCP/IP before. Seriously, it seems a headache, but the protocol is dead. I am familiar with it after reading it several times. Read the book and learn about the TCP/IP concepts. Otherwise, the subsequent work will not proceed. The TCP/IP protocol is divided into four layers. Applicatio

PPP Protocol composition and brief description of the basic process of Protocol negotiation 1. PPP (Point-to-Point Protocol) is a link layer Protocol designed for the transmission of data packets between the same unit and other simple links. The design is mainly used to establish a point-to-point connection to send dat

The ports and protocols used by the Samba service:1) Port 137 (UDP)-NetBIOS name service; NMBD2) port 138 (UDP)-NetBIOS Datagram Service 3) port 139 (TCP)-File and print sharing, SMBD (SMB (Server Message Block) protocol, mainly used on LAN, file sharing protocol) 4) port 3 (TCP)-for LDAP (Active Directory Mode) 5) port 445 (TCP)-NetBIOS service uses this port in WinDOS 2000 and later versions (Common Inter

IP protocol Header formatAddress Resolution Protocol ARPReverse Address Resolution Protocol RARPInter-network Control Message Protocol ICMPInternet Group Management Protocol IGMP IP Datagram HeaderIP Datagram Header format:The highest bit is on the left and is recorded

PPP Internet Protocol Control Protocol (ipcp) 1. Introduction PPP has three main components: Encrypts data packets on a serial line; The Connection Control Protocol (LCP) used to establish, configure, and detect data link connections ). The Network Control Protocol (NCP) protoc