protocol number

# Include String . H># Include # Include # Include If . H># Include # Include In . H># Include Int Main (){ Int Inet_sock; Struct Ifreq IFR;Inet_sock = socket (af_inet, sock_dgram, 0 ); // Eth0 is the interface Name Strcpy (IFR. ifr_name, "

The weather is good today. Internet Control Information Protocol (ICMP)The structure belongs to the transport layer, but it actually belongs to the network layer and is part of the IP layer. The ICMP protocol provides routing and transfer error

1. Summary TCP Header verification and calculation: TCP Header + TCP Data + TCP pseudo header. The TCP checksum overwrites the TCP header and TCP data, while the checksum in the IP header only overwrites the IP header and does not overwrite any data

Php network function OverviewCheckdnsrr-performs DNS communication checks on the specified host (Domain Name) or IP addressCloselog-disable the system log LinkDefine_syslog_variables-Initialize all syslog-related variablesDns_check_record-checkdnsrr

How to get the current traffic of a process in GNU Linux, gnulinux /********************************************************************* * Author  : Samson * Date    : 11/19/2014 * Test platform: *              3.13.0-24-generic *              GNU

5.1 common network commands In Red Hat Linux 7.1, network-related tools are provided. It is necessary to master these tools:Category 1: Setup tools1. netconf:Netconf is a part of Linuxconf provided by Red Hat Linux and is mainly used to set

Layer-4 and layer-7 Load Balancing details, layer-4 and layer-7 Load Balancing I. background of SLB: SLB (Server Load balancer): when multiple servers provide the same service, the Server Load balancer device has a virtual service address. When a

  13. multicast routing protocol-PIM (protocol-Independent Multicast Routing Protocol)   Multicast Routing Protocol classification-dense mode and Sparse Mode   Multicast branch tree   1. STP ---- source tree, Shortest Path Tree   To maintain table

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

TCP/IP FAQ (1)[Data Link] 1. Must the loopback interface address be 127.0.0.1? Class A IPs such as 127. x can be used as the address of the loopback interface, but 127.0.0.1 is commonly used. 2. Why is there no input for the loop interface? The

Current status of network management for enterprises and institutions in China: As a network administrator for enterprises and institutions, can you do the following? : Can I record all the windows opened by the client, the programs running, and all

Step 1 of Cisco ASA firewall VPN configuration: Create an address pool. To remotely access the client, you need to assign an IP address during logon. Therefore, we also need to create a DHCP address pool for these clients. However, if you have a

ACL Standard Control List and extended control list lo0: 2.2 r1 (R2) s1/0 ---- s2/0 r1 (R1) lo0 1.1 s1/0 -------- s2/0 r3 lo0 3.3 step 1... www.2cto.com r1: en config t hostname R2 no ip domain-lookup lin 0 exec-timeout 0 0 logging syn exit int lo 0

I. Internet Security Protocol Overview 1.1 Internet Protocol SystemArchitecture of the TCP/IP protocol IP datagram format and TCP/UDP message segment format Web Technology composition: HTTP protocol, HTML markup Language. The relative

Key minutesIP Protocol Note IP (Internet Protocol)IP addresses (IP address)Subnet mask (subnet mask)IP routing (IP router)IP 5 class RangeClass A 1-26Class B 128-191Class C 192-223Class D 224-239 Multicast (multicast)Class E 240-254 scientific

PrefaceThrough this chapter, can know in fact three times handshake and four waves actually really good simple, through this chapter of learning, I believe you will also think, in the future do not need to hear others ask three times the process of

1. What is a Socket? (What is a socket)A socket is an abstraction through which an application could send and receive data, in muchThe same-a open-file handle allows an application-read and write data to stablestorage.Simply put, sockets are

The metric calculation formula for EIGRP is basically the same as IGRP, but the metric calculation of EIGRP is igrp*256, which enables finer-grained metric identification.Four components of EIGRP: Protocol-related modules Rtp

TCP/IP basic Knowledge Network TCP/IPIntroductionThis article is the basic knowledge of TCP/IP protocol, focusing on the content of TCP/IP protocol cluster, the role of TCP, UDP, IP three common network protocols related to the basic

Two ways to define a computer network:1. Generally, the dispersed multiple computers, terminals and external equipment with communication lines to communicate with each other, and the computer hardware, software and data resources can be used