common ports and protocols

communicate between the two. The internet enables any autonomous (Non-core) gateway to send "accessible" information to other systems, at least to a core gateway. If there is a larger autonomous network, it is often assumed that there is a gateway to handle these accessible information. Like GGP, EGP uses a query process to let the gateway know its neighboring gateways and continuously exchange Routing and state information with its neighbors. EGP is a state-driven protocol that means it relie

Common ports management software commands ① Install software The following uses RPM installation as an example: [Root @ bsd01 ~] # Cd/usr/ports/archivers/RPM [Root @ bsd01/usr/ports/archivers/RPM] # make install clean A large number of temporary files are generated during software installation. These temporary files ar

[Post] common open-source protocols-general Linux technology-Linux technology and application information. For details, refer to the following section. [I = s] This post was last edited by smqt BSD open source protocol (original BSD license, FreeBSD license, Original BSD license) BSD open source protocol is a protocol that gives users great freedom. Basically, users can "do whatever they want", use them f

When using open source code, you also need to pay attention to the corresponding open source Protocol, especially in commercial applications. The following is a simple summary and understanding of common open source protocols. Assume that the open source code we use is a, and the self-developed source code is B. BSD Protocol 1. If B is open-source and B carries the code of A, B must carry the BSD Pro

Network protocol Application Layer DHCPDNSFTPGopherHTTPIMAP4IRCNNTP XMPPPOP3 SIPSMTPSNMP SSHTelnet RPCRTCP RTPRTSPSDP SoapGTPStunNTPSSDP More Transport Layer TCPUDPTLSDCCP SCTPRSVPPPTP More Network layer IP (IPv4IPV6) ·ICMPICMPv6 IGMPIs-isIPSecBGPRIP OSPF ARPRarp More Data Link Layer Wi-Fi (IEEE 802.11) ·WiMAX (IEEE 802.16) ·ATMDTMToken Ring · Ethernet FDDIFrame Relay ·GPRS EVDOHSPA HD

, such as: DVD player, color TV, audio, game consoles, cameras, cameras, video game consoles, home theater, telephone, telephone answering machine;Beige household appliances refers to computer information products, green appliances, refers to the quality of qualified under the premise, can be efficient use and energy-saving products;Green appliances in the use of the human body and the surrounding environment is not harmful, after the scrap can also be recycled home appliance products.　　There is

What is a license agreement. What is a license, when you issue a license for your product, you are in the transfer of your rights, however, you still have the copyright and patent (if you apply), the purpose of the license is to use your product to provide certain permissions. Whether the product is distributed to the public free of charge, or sell, a license agreement is very useful, otherwise, for the former, you are tantamount to giving up all of your rights, no one is obligated to show you

What are common TCP ports? FTP: defines the file transfer protocol. Port 21 is used. It is often said that a certain host has enabled the FTP service, which is the file transfer service. You must use the FTP service to download files and upload them to the home page. TELNET: Are you on BBS? In the past, BBS was a character-only interface. The server supporting BBS opened port 23 to provide external serv

theory that can be used is less than the actual one.LUNsYou can also connect multiple logical devices (such as disks, volume groups, and so on) under each SCSI target device (target), so that each logical device has a LUN (Logical Unit number) to identify itself, in order for the system to differentiate between each logical device. Each SCSI ID has a maximum of 32 LUNs, which starts from 0 by default (although 0 is occupied), and each LUN corresponds to a logical device.SCSI Communication Model

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, the general progressive download of HTTP files. The essence is to download a video file. The feature of the video file itself is that there is a header information, and some video frame data, it can be completely decoded and played. Obviously, you need to put the header information of the video file in front of the file. 7. HTML5At the same time, HTML developers are not lonely, and HTML5 is launched. In essence, this method is no different from the previous HTTP video protocol. However, the p

Common ping command protocols in the Network Network Protocol Network Firewall Router ICMP is the abbreviation of "Internet Control Message Ptotocol" (Internet Control Message Protocol. It is a sub-Protocol of the TCP/IP protocol family. It is used to transmit control messages between IP hosts and routers. A message control refers to a message of the network itself, such as network connectivity, host acces

/,slk,sdi,sdo four lines, less wiring but software control is more complex VSync Mode: This mode adds a vsync (frame sync) signal line in MCU mode, which is applied to the motion picture update. 7. MCU operating characteristics The driver ICS for the LCD of the MCU interface are all with Gram,driverIC as a piece of MCU coprocessor, accept the MCU sent over the Command/data, can be relatively independent work; CPU interface is often said that the system interface includes 80, 68

traditional UNIX version, the Linux version adds a lot of attributes and is more secure and simpler to configure. Similar to Scheduled tasks.13.chargen: Chargen Server,chargen using the TCP protocol (Character GeneratorProTocol) is a kind of network service, the main function is to provide similar remote typing functions.14.CHARGEN-UDP: Chargen server using the UDP protocol.15.cpuspeed: Monitors system idle percentages, reduces or accelerates CPU clock speed and voltage to minimize energy consu