apn protocol

XMPP protocol and practice, XMPP protocol practice I. XMPP protocol XMPP(Extensible Messaging and Presence Protocol scalable Message Processing site Protocol) isProtocols Based on Extensible Markup Language (XML)It is used for instant messaging (IM) and online on-site detect

HTTP protocol Summary HTTP protocol (Hyper-Text Transfer Protocol) HTTP is a stateless, application-level protocol based on the request-response model, which is based on a TCP link (three handshake) and an ongoing link mechanism in the HTTP 1.1 version, most of which are built on the HTTP

HTTP is a stateless protocol, with two consecutive requests for the same session that are not known to each other, and they are parsed by the newly instantiated environment, which does not save any information about the session, except that the application itself may already be stored in the global object. Own understanding, In asp: Every time the page is committed, the next commit will not be remembered, except that the application itself may have be

Application layer protocol: Each application tier is designed to solve a class of application problems. The solution of the problem must be accomplished through communication and collaboration between multiple application processes located in different hosts. Strict rules must be observed between application processes. Application-layer protocols should be defined as follows: the types of messages exchanged between application processes, such as the i

Protocol protocol:The protocol is similar to the interface in C #L used to declare the methodL if a class complies with an agreement, then it has all the statements of the agreement.L can comply with multiple protocolsAs long as the parent adheres to a protocol, the subclass adheres to that protocol.Comply with the agreement Inheritance by:1.

, it becomes easy to enable the GTIDs function. However, GTIDs not only replaces the old binary log file/location with a separate identifier, but also adopts a new replication protocol. If you do not understand this yet, you can learn something in this article. Replication protocol: New VS old The old protocol is often simple: first, connect to a given binary log

MySQL5.6 has many new features, many of whom are interested in the global transaction ordinal function (Gtids). The reason why everyone is interested in this feature is that it's always a hassle to reconnect from the server and a new primary server, but it's easy to do after enabling the Gtids feature. However, the use of Gtids not only replaces the old binary log file/location with a separate identifier, it also uses a new replication protocol. If yo

Digression: Originally wanted to follow the internet level from the bottom up review these agreements, but today really have to break the case, DHCP has to say!Host from one network to another network, then the structure of IP address will change, today's mainstream has the following several modification scenarios:(a) Change of address:The host changes its address when moving to a new network, where a DHCP protocol is needed to associate it with a new

Mysql Protocol sniffing and mysql Protocol sniffingRequirement Monitors all the mysql traffic of the network card for resolution. You can perform intrusion detection (IDS) or data integration without affecting existing services.Key points of the agreement At first, it was found that the data packet format was different when mysql-front was used to access the database and the mysql client was used to access

Summary and relationship between TCP/IP and http protocols 1. The IP protocol is not oriented, but provides data links as best as possible. Www.2cto.com 2. TCP is a connection-oriented, full-duplex protocol that provides reliable data transmission. Understanding the full duplex feature makes it easy to understand the TCP three-way handshake process. In fact, it is the process of testing the link. A sends A

Distance vector protocol vs Link Status ProtocolDistance vector protocol: Route entries are transmitted, network visibility is only one hop, computing routing is based on neighbors, and loops may occur. ----- Link Status Protocol Based on the Bellman algorithm: transmits link information (MAP fragment); visibility is the entire topology; computing routing is base

First of all, if any of the small partners feel unfamiliar, you can read this blog in front of the two blog, which tells the tall Jsb,unity hot update program, with the powerful universe first editor vs to develop Unity Thermal update script, update C # is not a dreamThis demo project I have the long ball, the address here Http://pan.baidu.com/s/1qWQlXUW; after downloading (put on D plate on D plate on D disk!!!!) The Unity project inside opens and runs the main scene. will appear, the only mean

have written. - Rewind ($FP); - Echo stream_get_contents ($fp); - */ in - //Test write-only data flow to$ out= fopen ("Php://output","a"); +Fputs ($ out,"tests can only output streams");Available options:Php://filter's Trial method: 1 /* */ 2 ReadFile ( php://filter/read= string.toupper/resource=http://www.example.com " 3 4 /* */ 5 ReadFile ( " php://filter/read=string.toupper|string.rot13/resource=http:// www.example.com ); 1 /* This will filter out the characters "Hello World"

The above describes the overall architecture of the TCP protocol, today introduces the TCP protocol's famous three-time handshake and four-time handshake.The server and client must establish a connection before communicating, which is done through three handshakes, thus ensuring the reliability of the communication.The steps for the three-time handshake are as follows:Suppose A is the client, B is the server, and a actively communicates with B, the st

? 03:01:59? GMT Server :? Apache-Coyote/1.13.2? Http status response code 3.2.1? 1 **: request received, continue processing 100 -- the customer must continue to send the request 101 -- the client requests the server to convert the HTTP protocol version according to the request 3.2.2? 2 **: The operation is successfully received, analyzed, and accepted. 200 -- Transaction successful 201 -- prompt to know the URL of the new file 202 -- accept and proce

1. UDP: A transport layer protocol for user datagram. Unreliable and connectionless. 2. header (8B in total): source port number (2B), destination port number (2B), UDP length (2B), UDP checksum (2b) Note: (1) for UDP port numbers, the port numbers are used to mark the application process. TCP and UDP can share a port number, which can be distinguished by protocol fields in the IP header. (2) UDP lengt

Differences between get and post in http protocol, and getpost Protocol We are no stranger to the get and post submission methods in the http protocol. Now we analyze the nature and difference of the two submission methods.First, let's talk about the differences between the two of them:Difference between the post and get methods in Form submission 1. get is to g

Linux Kernel protocol stack socket query cache routing mechanism, protocol stack socketIs it faster to query the route table? Or is it faster to query the socket hash table? This is not the root of the problem. The root cause of the problem is how to use the two effectively, so that the two can become partners rather than competitors. What's going on?We know that if a data packet is to arrive locally, it wi

BSD and GPL are two common protocol types in the open source field. The differences between the two are as follows: If you use a BSD-based OpenSource codeIn addition to opening up the sourceCodeIn addition, it can also be issued as a binary form, or even as a commercial software release. (You must also follow the BSD Protocol) If you use open-source code based on the GPL

I. Introduction to the implementation of the stop-and-wait protocol I designed the program to implement the rdt3.0 version of the stop-and-wait protocol, the sender sends packets in the order of 0, 1 alternating, and when the 0 packets begin to be timed, only receive the ACK0 to continue sending 1 packets, if it has timed out without receiving the ack0, This requires retransmission of packet 0; The receiver