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Profile:Before these concepts a little confused, look up some information, a little generalization of their differences. If there is an error, please clap ~ ~ ~First look at the picture:What is TCP/IP?TCP/IP is a protocol group that can be divided into three levels: Network layer, Transport layer and application layer.At the network layer are IP protocols, ICMP protocols, ARP protocols, RARP protocols, and BOOTP protocols.There are TCP protocols and UDP protocols in the transport layer.In the ap

PHP uses Redis persistent connection methods, phpredis connection details This article describes how PHP uses Redis persistent connection. We will share this with you for your reference. The details are as follows: Php-redis Project address on github: https://github.com/phpredis/phpredis Pconnect function declaration Time_out indicates the number of seconds after

HTTP is a non-connected transaction protocol, the underlying use of TCP, connection pooling is a TCP connection, the purpose is to make multiple HTTP requests on a TCP connection to improve performance. At the end of each HTTP request, HttpClient will determine if the connection can be persisted, and if it can be manag

socket interpretation, HTTP and socket long connection and short connection difference. TCP/IP TCP/IP is a protocol group that can be divided into three levels: Network layer, Transport layer and application layer. At the network layer are IP protocols, ICMP protocols, ARP protocols, RARP protocols, and BOOTP protocols. There are TCP protocols and UDP protocols in the transport layer. ； In the applicat

Oracle connection method: oracle connection In general, Join methods include: Nested Loops, Hash-Join, Sort Merge Join, and Cartesian Join (Merge Join Cartesian ). 1. Nested loop join (Nested Loops) Nested loops include the concepts of External tables (drivingtable, driving table) and internal tables (inner or driven-to table, driven table). Generally, the result set is larger than the internal table, A sma

The process of establishing a connection for TCP is drawn. Assume that host A is running a TCP client, and B runs a TCP service program. The TCP processes at the beginning of both ends are in the CLOSED (off) state. The boxes below the host are the states in which the TCP process is located, respectively. Note thata actively opens the connection, while B passively opens the

long connection and short connection The so-called long connection, refers to a TCP connection can send multiple packets in a row, in the TCP connection to maintain, if there is no packet sent, the need for both sides to send detection packets to maintain this

Label:I have a few points that do not quite understand, look at you under the guidance of the Warrior.1, the application of the Java EE, there is a user request will start a thread. And if we put connection in threadlocal, then our program only needs a connection to connect to the database, each thread is a copy of the connection, then why is it necessary to data

HTTP is a non-connected transaction protocol, the underlying use of TCP, connection pooling is a TCP connection, the purpose is to make multiple HTTP requests on a TCP connection to improve performance. At the end of each HTTP request, HttpClient will determine if the connection can be persisted, and if it can be manag

int I;Enum color {red, green, blue };Const double Pi = 3.1415;Union rep {...};Void test (INT p ){};Foo;Bar B; 3. compilation unit When a C or CPP file is being compiled, the Preprocessor first recursively contains the header file to form a single source file containing all necessary information. This source file is a compilation unit. This compilation unit will be compiled into a target file (. O or. OBJ) with the same name as the CPP file name ). The Conne