print barcode labels using vb.net Reserved Sockets in Java

Generator Quick Response Code in Java Reserved Sockets

Reserved Sockets
Paint QR Code In Java
Using Barcode maker for Java Control to generate, create QR Code image in Java applications.
Scanning QR In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
Once connected, a higher-level protocol ensues, which is dependent on which port you are using TCP/IP reserves the lower 1,024 ports for specific protocols Many of these will seem familiar to you if you have spent any time surfing the Internet Port number 21 is for FTP, 23 is for Telnet, 25 is for e-mail, 79 is for finger, 80 is for HTTP, 119 is for netnews and the list goes on It is up to each protocol to determine how a client should interact with the port
Bar Code Generator In Java
Using Barcode creator for Java Control to generate, create bar code image in Java applications.
Barcode Recognizer In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
- 398 -
Draw Quick Response Code In Visual C#.NET
Using Barcode creation for Visual Studio .NET Control to generate, create QR Code ISO/IEC18004 image in VS .NET applications.
QR Code Printer In VS .NET
Using Barcode generation for ASP.NET Control to generate, create Denso QR Bar Code image in ASP.NET applications.
For example, HTTP is the protocol that web browsers and servers use to transfer hypertext pages and images It is quite a simple protocol for a basic page-browsing web server Here's how it works When a client requests a file from an HTTP server, an action known as a hit, it simply prints the name of the file in a special format to a predefined port and reads back the contents of the file The server also responds with a status code number to tell the client whether the request can be fulfilled and why Here's an example of a client requesting a single file, /indexhtml, and the server replying that it has successfully found the file and is sending it to the client: Server Listens to port 80 Accepts the connection Reads up until the second end-ofline (\\n) Sees that GET is a known command and that HTTP/10 is a valid protocol version Reads a local file called /indexhtml Writes "HTTP/10 200 OK\\n\\n" Copies the contents of the file into the socket Hangs up "200" means "here comes the file" Reads the contents of the file and displays it Client Connects to port 80 Writes "GET /indexhtml HTTP/10\\n\\n"
QR Creation In .NET Framework
Using Barcode generator for .NET Control to generate, create QR Code 2d barcode image in .NET framework applications.
QR Code 2d Barcode Encoder In VB.NET
Using Barcode generator for .NET framework Control to generate, create Quick Response Code image in Visual Studio .NET applications.
Hangs up
Bar Code Printer In Java
Using Barcode printer for Java Control to generate, create barcode image in Java applications.
Universal Product Code Version A Generation In Java
Using Barcode maker for Java Control to generate, create UPC Symbol image in Java applications.
Obviously, the HTTP protocol is much more complicated than this example shows, but this is an actual transaction that you could have with any web server near you
Generate Data Matrix 2d Barcode In Java
Using Barcode creator for Java Control to generate, create Data Matrix 2d barcode image in Java applications.
Making UCC-128 In Java
Using Barcode creation for Java Control to generate, create UCC.EAN - 128 image in Java applications.
Proxy Servers
Identcode Printer In Java
Using Barcode drawer for Java Control to generate, create Identcode image in Java applications.
Scanning Code128 In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
A proxy server speaks the client side of a protocol to another server This is often required when clients have certain restrictions on which servers they can connect to Thus, a client would connect to a proxy server, which did not have such restrictions, and the proxy server would in turn communicate for the client A proxy server has the additional ability to filter certain requests or cache the results of those requests for future use A caching proxy HTTP server can help reduce the bandwidth demands on a local network's connection to the Internet When a popular web site is being hit by hundreds of users, a proxy server can get the contents of the web server's popular pages once, saving expensive internetwork transfers while providing faster access to those pages to the clients Later in this chapter, we will actually build a complete caching proxy HTTP server The interesting part about this sample program is that it is both a client and a server To serve certain pages, it must act as a client to other servers to obtain a copy of the requested content
Paint Data Matrix ECC200 In C#.NET
Using Barcode encoder for .NET Control to generate, create DataMatrix image in Visual Studio .NET applications.
Print Code 3/9 In .NET
Using Barcode encoder for Reporting Service Control to generate, create ANSI/AIM Code 39 image in Reporting Service applications.
Internet Addressing
Create GTIN - 12 In None
Using Barcode drawer for Office Word Control to generate, create UPC Symbol image in Microsoft Word applications.
Making UPC-A Supplement 2 In Objective-C
Using Barcode encoder for iPhone Control to generate, create GS1 - 12 image in iPhone applications.
Every computer on the Internet has an address An Internet address is a number that uniquely identifies each computer on the Net There are 32 bits in an IP address, and we often refer to them as a sequence of four numbers between 0 and 255 separated by dots () This makes them easier to remember, because they are not randomly assigned they
Generating GS1 DataBar In VS .NET
Using Barcode maker for .NET framework Control to generate, create GS1 DataBar image in .NET framework applications.
Bar Code Decoder In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
- 399 -
are hierarchically assigned The first few bits define which class of network, lettered A, B, C, D, or E, the address represents Most Internet users are on a class C network, since there are over two million networks in class C The first byte of a class C network is between 192 and 224, with the last byte actually identifying an individual computer among the 256 allowed on a single class C network This scheme allows for half a billion devices to live on class C networks
Domain Naming Service (DNS)
The Internet wouldn't be a very friendly place to navigate if everyone had to refer to their addresses as numbers For example, it is difficult to imagine seeing "http://192991/" at the bottom of an advertisement Thankfully, a clearinghouse exists for a parallel hierarchy of names to go with all these numbers It is called the Domain Naming Service (DNS) Just as the four numbers of an IP address describe a network hierarchy from left to right, the name of an Internet address, called its domain name, describes a machine's location in a name space, from right to left For example, wwwstarwavecom is in the COM domain (reserved for US commercial sites), it is called starwave (after the company name), and www is the name of the specific computer that is Starwave's web server www corresponds to the rightmost number in the equivalent IP address
Copyright © OnBarcode.com . All rights reserved.