hl7 protocol

The writes code in C #, and many times it encounters the HTTP protocol or the TCP protocol, which makes a simple understanding. The TCP protocol corresponds to the transport layer, and the HTTP protocol corresponds to the application layer, which is inherently not comparable. The HTTP

The ARP Address Resolution protocol is a TCP/IP protocol that obtains physical addresses based on IP addresses. It works in the second layer of the OSI seven-layer model-the data link layer.Using the ARP Address Resolution protocol, the destination hardware address (MAC address) information can be resolved according to the IP address information in the IP packet

Registering an application to a URL protocol (http://msdn2.microsoft.com/en-us/library/aa767914.aspx) ArticleAbout asynchronous pluggable protocols describes how to develop and process a new protocol.Program(Processor handlers ). In some cases, we may describe how to call another application to process custom protocols ). Register an existing application as a URL protocol processor. Once the application i

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