ip telephony protocols

provides communication sessions between computers. The selection of transmission protocols depends on the data transmission mode.Two transmission protocols:Transmission Control Protocol TCP: provides reliable communication connections for applications. It is suitable for transmitting a large amount of data at a time. It is applicable to applications that require responses.User Datagram Protocol (UDP): provides connectionless communication and does no

Crossing, please give me more advice.IP protocol, Interner Protocol, Internet Protocol, provides three-layer addressing and three-layer communication capabilities.Grab the package as follows:Summary of content:Content analysis:1, Version: Used to identify the IP protocol version number, Ipv4/ipv62, the first length (headers length): Identifies the length of the IP header, the minimum length is 20 bytes, the

, Clnt_adr; Socklen_t CLNT_ADR_SZ;if(ARGC! =2) {printf("Usage:%s , argv[0]);Exit(1); } Serv_sock = socket (pf_inet, Sock_stream,0);if(Serv_sock = =-1) Error_handling ("socket () error");memset(serv_adr,0,sizeof(SERV_ADR)); serv_adr.sin_family = af_inet; SERV_ADR.SIN_ADDR.S_ADDR = htonl (Inaddr_any); Serv_adr.sin_port = htons (Atoi (argv[1]));if(Bind (Serv_sock, (structSOCKADDR *) serv_adr,sizeof(SERV_ADR)) == -1) Error_handling ("bind () Error");if(Listen (Serv_sock,5) == -1) Error_handlin

Internet Protocol IP and its supporting protocols @ (computer network) IP protocol is one of the two most important protocols in TCP/IP protocol cluster. The protocol is as follows: Address Resolution Protocol –arp Inverse address resolution –RARP Internet Control Message P

layer:Routers, layer three switches Transport Layer:Four-layer switch, also has a router working on layer four T the CP (transmission Control Protocol) and UDP (User Datagram Protocol) protocols belong to the Transport layer protocol. TCP provides reliable data transmission in IP environment, and it provides services including data transfer, reliability, effective flow control, full duplex operation and mu

First, TCP/IP and IP are two different protocols. They are divided into different layers in the layer-7 network model. IP is the network layer protocol, and TCP is the transport layer protocol at the higher layer, TCP is built on the IP protocol, so TCP and

the address type to be converted, and 0x0800 is the IP address, the length of the following two addresses is 6 and 4 (bytes) for the ethernet address and IP address respectively. The op field is 1, indicating the ARP request, and the OP field is 2, indicating the ARP response. The process of the Address Resolution Protocol is as follows: Iv. RARP (Reverse Address Resolution Protocol) The opposite of ARP

more powerful (complex) filter. It allows you to quickly and accurately locate the required records in a log file. 1. Capture Filter The syntax for capturing filters is the same as other software developed using LIPCAP (Linux) or WinPcap (Windows) libraries, such as the famous tcpdump. The capture filter must be set before starting the capture, which is different from the display filter.The steps to set up a capture filter are:-Select Capture-> options.-Fill in the "Capture Filter" bar or click

allocation is not enough (not enough), and too much allocation is a waste (shameful waste ). The ipv12 Technology Based on ing IP addresses can perfectly solve the above problems! 2. Advantages of limit 12 (1) The 12th address is truly infinite, and there is no waste. (2) The 12th address structure is perfectly hierarchical and naturally aggregated, And the router forwarding (addressing) is extremely simple. (3) The 12th address extension is nat

Graphic TCP-IP protocols (1) In this paper, two diagrams are used to sort out the knowledge of TCP-IP protocol. The TCP communication process consists of three steps: establishing a TCP connection channel, transmitting data, and disconnecting a TCP connection channel. 1 shows the TCP communication process. Figure 1 TCP three-way handshake Figure 1 consists of

Hierarchy name function Agreement Application tier (Application layer) Responsible for implementing all application-related functions, corresponding to the upper three layers of the OSI reference Model FTP (File Transfer Protocol) HTTP (Hypertext Transfer Protocol) DNS (domain Name Server protocol) SMTP (Simple Mail Transfer Protocol) NFS (Network File System protocol) The Transport layer (Transport layer) Responsible for providing reliable

In the preceding correspondence, the hash function is representedHash (x) = x % 10. That is to say, to give a three-digit number, weTake the last bit of itAs the hash value of the three-digit number. Hash Tables are widely used in computer science. For example: For more information about how to broadcast packets with a small horn (Ethernet and Wi-Fi protocols) Checksum in the IP protocol: see my

The network and Protocol transport layers in the TCP/IP model define two end-to-end protocols: TCP and UDP. TCP (Transmission Control Protocol) Transmission Control Protocol, which divides the input byte stream into packet segments and sends them to the Internet layer. TCP also needs to process traffic control to prevent the receiver from being unable to process too many packets sent to the low-speed receiv