network service protocol

(primitive), such as a system call or library function. A system call is a service primitive provided by the operating system kernel to a network application or a high-level protocol. The n layer in the network always provides a more complete service to the N+1 layer than t

, required operation not performed 553 The mailbox name is not available and the requested operation is not performed 354 start the message input to "." End 554 operation failed Several basic features of UDP protocol (1) UDP is a connectionless protocol to transmit data before the source and terminal do not establish a connection, when it wants to transfer simply to crawl data from the application, and as q

Software download for analysis: Wireshark-win32-1.10.2.exeRead the guided Tour1. Analyze and apply the ARP protocol2. Analyzing IP Protocols3. Analyzing the ICMP protocol1. Analysis of the format and content of ARP messages(1) The ARP request message of ping 172.18.3.132:000108000604000100e04c512ae8ac12038e000000000000ac120384Physical network Type hardware type:0001-ethernet (1)Protocol type

Network transmission protocol and http protocol, transmission http protocolOverview: it refers to the constraints and specifications for communication between the server and the client. The data interaction between the client and the server is not disorganized and must follow (based on) certain specifications. Common protocols: A) HTTP and HTTPS Hypertext Transfe

HTTP network protocol (IV) and http network protocolSecure Web HTTPS HTTP has three obvious disadvantages: Communication uses plain text (not encrypted), and the content may be eavesdropped. If you do not verify the identity of the contact, you may experience disguise. Unable to prove the integrity of the message, so it may have been tampered. Although there

Network Protocol Resolution-802.11 Protocol Summary, protocol-802.11802.11 Protocol Version Description Operating frequency 802.11 Original Standard 2.4G (2 Mb/s) 802.11a New Physical Layer supplement 5G (54 Mb/s) 802

tolerated, so we adopt the UDP transport protocol. But the UDP protocol itself is non-connected and does not provide quality assurance. The high-level protocol rtp/rtcp based on UDP can provide traffic control and congestion control services together. The graph gives a RTP/UDP/IP-based H. 264 frame for video transmission.H. 264 RTP encapsulation strategy for vid

IP protocol Header formatAddress Resolution Protocol ARPReverse Address Resolution Protocol RARPInter-network Control Message Protocol ICMPInternet Group Management Protocol IGMP IP Datagram HeaderIP Datagram Header format:T

--> 　　核心提示：-->With the development of the IP network to the multi-service network, especially the development of VoIP in recent years, it is inevitable to transmit signaling messages in the IP network. But in the IP network cannot provide high-quality transmission services l

Recently, when using PowerDesigner to connect remote Oracle for reverse engineering, there have been a number of problems that are common, mostly due to configurationDescription(1) Remote database version Q oracle11g 64bit(2) Local simultaneous installation:ORACLE11G Client 32bitoracle11g 64bit(3) Native installation PowerDesigner 15.2(3) Pre-preparation:Direct copy of ORACLE server%oracle_home%\network\admin\tnsnames.ora fileTo the ORACLE client%orac

successful, the client wants something in the response message;301 Moved Permanently: client Ah, you want to request the resources have been permanently moved, I put his new address in the location of the head domain;302 Moved temporarily: client Ah, you want to request the resources temporarily to go somewhere else, I put his position in the location of the head of the domain, you can first go there to find him, but he should be back to his own home;304 Not Modified: client Ah, the resource yo

"OSI layer Seven Protocol" Application Layer An application that communicates with other computers, which is the communication service of the corresponding application. For example, a word processor without a communication function would not be able to execute the code of communication, and the programmer working on the word processing did not care about the 7th layer of the OSI. However, if you add an opt

implementation details of this layer of service are masked to the upper layer.The user touches, just the top layer, does not feel at all below the layer. To understand the Internet, you have to start from the bottom and understand the capabilities of each layer from below.How to layer different models, some models are seven layers (not commonly used), some four layers (now this is used), such as:For ease of understanding, we divide it into five layer

between different network segments of the same MAC standard generally only involves the data link layer, while data transmission between different MAC standards involves the network layer. For example, an IP router works at the network layer, and thus multiple networks can be interconnected. IP protocol at this layer.

The Transport layer provides communication services to the application layer above it, which belongs to the highest level of the communication section and is also the bottom of the user's function. Two hosts are actually communicating with each other in a two host application process . Communication between application processes is also known as end-to-end communication . The messages of different processes in the application layer are delivered down to the transport layer through different

SSCOP Service specific Connection oriented Protocol business-specific connection-oriented protocolThe function of SSCOP is to provide service to its upper SSCF module, to establish and release signaling connection for upper layer signaling user, and to provide a confirmed and non-verifiable message data transmission on the connection to reliably exchange signalin

the Thunder (dedicated download link) protocol. (Representative software: Thunderbolt) format thunder://News accesses the resource through NNTP.Tencent by supporting Tencent (dedicated chat connection) protocol and user conversations. (on behalf of the software: QQ, TM) format tencent://message/?uin= number site=menu=yesMsnim by supporting Msnim (dedicated chat connection)