hdlc protocol

Baidu Encyclopedia Description:Hypertext Transfer Protocol (Http,hypertext Transfer Protocol) is one of the most widely used network protocols on the Internet. All WWW documents must comply with this standard. HTTP was originally designed to provide a way to publish and receive HTML pages. 1960 American Ted Nelson conceived a way to process text messages through a computer called hypertext (hypertext), whic

Internet Protocol Summary, Internet Protocol Today, I saw an article on network protocol on my way to work. I think it's a good job to write. Well, of course I want to keep some good stuff. I 'd like to share it with you here! This article is reproduced in the network log of Ruan Yifeng Author: Ruan Yifeng Original article: http://www.ruanyifeng.com/blog/2012/05/

Network Topology As mentioned above, OSPF is a link status protocol. How does OSPF describe the link connection status? Abstract Model 1 indicates that an Ethernet interface of a router is connected to only one Ethernet segment instead of other routers. In this case, router R1 running OSPF can only identify itself and cannot identify the devices (hosts, etc.) on this network segment ); abstract Model 2 indicates that router R1 is connected to a route

Analysis of TCP/IP layer-4 protocol system and tcpip layer-4 Protocol TCP/IP layer-4 protocol system 1) The link layer, also known as the data link layer or network interface layer, usually includes the device driver in the operating system and the network interface card corresponding to the computer. They work together with the physical interface details of the

SMTP is used to deliver e-mail messages on the Internet. Document RFC821 provides all the details of the agreement. But you just have to remember the following-the basic commands and methods of the agreement. The principle of the protocol is simple. Nothing more than a client computer sending a command to the server, and then the server returns some information to the client computer. The commands sent by the guest room and the server response are s

Introduction There are many types of caching: Server caching, Third-party caching, browser caching, proxy caching, gateway caching, database caching, and so on. The browser cache is the least expensive because the browser cache relies on the client and consumes almost no server-side resources. Today's summary is also associated with browser caching. Browser caching must be very familiar, simply that the browser on the disk to the most recent user requested data storage, when we request this page

AJP13 is the directional package protocol. For performance reasons, the binary format is used to transmit readability text. The Web server is connected through a TCP connection and a servlet container. To reduce the cost of process generation sockets, the Web server and the servlet container try to maintain a persistent TCP connection and reuse a connection for multiple request/reply loops. Once a connection is assigned to a specific request, it is no

UDP belongs to the transport layer together with the TCP mentioned earlier. UDP differs from TCP in that it is a non-connection-oriented protocol, that is, when both parties communicate with each other, they do not need to establish a connection beforehand. So the UDP header saves a lot of fields, and the UDP header is only 8 bytes. The UDP header consists of the following: The UDP header contains only the source port and destination port, plus th

TCP/IP protocol ----- excellent notes, tcpip protocol -----1. Introduction The TCP/IP Protocol is not a single TCP Protocol or an IP Protocol. It is a group of protocols, including TCP and IP Protocol, UDP

the connection statuses in the network constitute the link status database, and each IS has at least one LSDB. IS uses SPF algorithm and LSDB to generate its own route.LSPDU (Link State Protocol Data Unit ). In IS-IS, each IS generates an LSP, which contains all the link status information of this IS. Each IS collects all LSPs in the region to generate their own LSDB.Network Protocol Data Unit (NPDU ). It

Android communication protocol and Android communication protocol I. TCP/IP protocol (Transport Layer Protocol) 1. Socket and ServerSocket Socket is the intermediate abstraction layer for communications between the application layer and the TCP/IP protocol cluster. Socket is

First, Introduction The Protocol deals with properties and methods that act like abstract classes in Java, and types in swift implement some of the agreed properties and methods by adhering to the protocol. The protocol in Swift is declared using the Protocol keyword. The protocol