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Commands and responses to the SMTP protocol From the previous communication model, you can see that the SMTP protocol's session between sending SMTP and receiving SMTP is done by sending SMTP commands and receiving an answer to SMTP feedback. After the communication link is established, Send SMTP send mail command message sender, if receive SMTP at this time can receive mail then make OK answer, and then send SMTP continue to Issue RCPT command to con
Dark Horse programmer-protocol (protocol), dark horse-protocol------ Java training, Android training, iOS training, and. Net training. We look forward to communicating with you! ------- Can be used to declare a lot of methods (member variables cannot be declared) As long as a class complies with this Protocol, it is
Mobile 10657 SMS China Unicom 10655 SMS China Telecom 10659 SMS 1-hand direct connection port. Mobile CMPP protocol CMPP (China Mobile Peer to Peer) Chinese name: China Mobile Communication Internet Short Message Gateway Interface Protocol Note: This is the enterprise specification of China Mobile Communications Corporation. The specifications describe the types and definitions of messages between d
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 Protocol TYPE:0
Today I'll focus on my view on the SLIP Protocol and PPP protocol on the link layer. Today should be written on the third day, for their own insistence point a praise.Slip agreement In fact not much, it is called Serial Line Imternet protocol, translated into Chinese is a serial Internet protocol. It is a low-speed ser
Let's look at what happens when we enter http://www.mycompany.com:8080/mydir/index.htmlin the browser, behind the scenes.First HTTP is an application layer of protocol, in this layer of protocol, is just a communication specification, that is, because the two sides to communicate, we have to agree to a specification beforehand.1. Connection when we enter such a request, first to establish a socket connectio
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 Transfer Proto
Transfer http://blog.csdn.net/goodboy1881/article/details/668556 ------------------------------------------------------ Put the three Protocols together for learning because these three protocols are on the same layer. ARP is used to find the MAC address of the Ethernet NIC of the target host, and the IP address carries the message to be sent. The data link layer can get the data transmission information from ARP, and get the data information to be transmitted from the IP address.1. IP
There has been a problem for a long time, everyone is talking about the HTTP protocol, TCP protocol, IP protocol, what is the difference between them, what is the use, no one told me, recently read this "illustrated http" understand some of the film from the bookFirst, understand a transmission stream to expandFor example, HTTP is the first client in the Applicat
Put these three protocols together because the three protocols are on the same level, the ARP protocol is used to locate the target host's Ethernet NIC MAC address, and the IP hosts the message to be sent. The data link layer can get the data transfer information from ARP, and the data to be transmitted from IP.1.IP protocolThe IP protocol is the core of the IP protocol
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) 802.11b The most popular standard, Wi-Fi 2
IP Datagram IP is the core protocol in the TCP/IP protocol family. All TCP, UDP, ICMP, and IGMP data are transmitted in the IP datagram format. The IP address only provides the best-effort transmission service. If an error occurs, the IP address will lose the data and send an ICMP message to the source. In addition, IP datagram can not be accepted in the sending order. The IP datagram format is as follows:
management information library shows what each object is ". (2) manage database variables. There are two types of variables: simple variables and tables. Simple variables correspond to the leaf nodes in the MIB tree. The identification method is to add ". 0" after the Object ID, and the table identification method uses the Union index method. 3. SNMP Protocol and Security Mechanism (1) The SNMP protocol
-compatible format. NMS running applicationsProgramTo monitor managed devices. In addition, NMs provides a large number of processing programs and necessary storage resources for network management. Any managed network requires at least one or more NMS. Currently, three types of SNMP are available: SNMPv1, SNMPv2, and SNMPv3. There is no big gap between version 1st and version 2nd, but SNMPv2 is an enhanced version that includes other
(SNMPv2: Simple Network Management Protocol V2) SNMP is a standard protocol used to manage network nodes (servers, workstations, routers, switches, and hubs) in an IP network. It is an application layer protocol. SNMP enables network administrators to manage network performance, discover and solve network problems, and plan network growth
Video image transmission has the following characteristics: 1 requirements for small transmission delay, high real-time, 2 transmission flow, requiring high transmission efficiency; 3 allow transmission errors or data loss on certain programs. According to the above characteristics, it is more ideal to use UDP protocol to transmit video relative to TCP protocol. UDP is the abbreviation of User Datagram
Mobile device Management (MDM) and OMA (OTA) DM Protocol Wizard (ii)--WAP Protocol (1)On the "Mobile Device Management (MDM) and OMA (OTA) DM Protocol Wizard (i)"16. Can I access WiMAX devices directly from the Web server?See "WAP Protocol (1)--6th WAP Network Deployment" in this article17. Can I use TCP instead of WDP
First, the introduction The Protocol deals with properties and methods that act like abstract classes in Java, and the types in swift implement agreed properties and methods by complying with the protocol. The protocols in Swift are declared using the Protocol keyword. The protocol in Swift also has a very interesting
PPP is one of the most basic protocols in the network. PPP is the main content of this article. First, let's take a look at the basic concepts of the PPP protocol. The Point-to-Point Protocol is a data link layer Protocol designed to transmit data packets between equal units. This link provides full duplex operations and transmits data packets in sequence. PPP pr
Redis Communication Protocol (protocol) This document is translated from: Http://redis.io/topics/protocol. The Redis protocol compromises between the following three goals: ease of implementation can be efficiently analyzed by computer (parse) can easily be read by humans to understand the network layer The client and
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