protocol number

OSPF is an internal gateway routing protocol, which is a link-state protocol.Internal Gateway Protocol (IGP): An intra-zone running protocol.External Gateway Protocol (EGP): an agreement between a zone and an area.------------------------------------

Instance:#iptables-T filter-a input-s 172.16.0.0/16-d 172.16.100.7-j Drop the source address of the 172.16.0.0 network segment, the access 172.16.100,7 packets are discarded.#iptables-L-N View rules for the filter table#iptables-T Nat-l-n View rules

The state and shutdown of TCP connections and their impact on server and client 1. Status of the TCP connection let's start by describing the status of the TCP connection during the setup and shutdown process. The TCP connection process is the

The neighbor relationship of the OSPF protocol is established by exchanging the Hello message, so we first understand the type of the message and the structure of the Hello message.1 OSPF protocol has 5 protocol messages (very important, which are

PHP network operation function summary, php function summary. PHP network operation function summary, php function summary checkdnsrr-perform DNS communication check for the specified host (domain name) or IP address closelog-disable system log link

1 .  TCP status of the connectionLet's start by describing the status of the TCP connection during the setup and shutdown process. The TCP connection process is the transformation of the State, and the factors that cause the state to transition

L2 switches generally use the CAM table in the hardware chip of ASIC (Application Specific Integrated Circuit, dedicated IC, therefore, the forwarding performance is very high. The layer-3 forwarding of a layer-3 Switch relies on the ASIC chip (the

Basic overviewThe primary function of the transport layer is to provide end-to-end communication to applications on two hosts, identifying the correspondence between the corresponding programs on the two hosts via the port number. The most important

The protocol number for OSPF is 89, and when OSPF packet multicasting occurs, their TTL is set to 1,1. Packet headerAll OSPF packets are started by a 24-byte eight-bit group header650) this.width=650; "Style=" Background:url

Plan agreement for inter-company procurement Inter-company procurement can be in the form of procurement orders, but in some cases it is more appropriate to adopt a plan agreement. For example, a large amount of spare parts may be dumped between

function Getqos_one ($ethnumber) {$qos = new Qosclass (); $file = "/usr/local/lte/em100cfg". $ethnumber; echo $file; $ Content=file_get_contents ($file); $list =explode ("\ n", $content), $qosarry =array (); for ($i =1; $i 0)//the line exists ' = ' $

Hello everyone, my name is Open Shortest Path Fist. The Chinese name is "Open Shortest Path First.What? Why is there an "Open" in the name "? Is it "open? Relatively speaking, it is indeed. I am an Internet Engineering Task Group. This name is

First, Introduction Terminal Services refers to the functionality that Windows provides in order to support multiple, interactive user sessions in a single system. With Windows Terminal Services, a remote user can establish a session on another

Let's review the composition of the domain name address:http://www. Google:8080/script/jquery.js/HTTP (Protocol number)www (sub-domain)Google (primary domain)8080 (port number)Script/jquery.js (requested address)* When any of the protocols,

Python provides two basic socket modules.The first one is the Socket, which provides the standard BSD Sockets API.The second is Socketserver, which provides a server-centric class that simplifies the development of Web servers.The following first is

Three methods for implementing cross-origin access using AjaxThis article introduces three solutions for implementing cross-origin access through ajax, which are very practical. I personally recommend the third solution. You can focus on it.    1.

Python provides two basic socket modules.The first one is the Socket, which provides the standard BSD Sockets API.The second is Socketserver, which provides a server-centric class that simplifies the development of Web servers.Here is the socket

The preprocessing process of the client message in the agent.Agent-defined three types of requests://api.go var RCode = map[int16]string{ 0: "heart_beat_req", // 心跳包.. 1: "heart_beat_ack", // 心跳包回复 10: "user_login_req", // 登陆 11:

1.Socket typeSocket (family,type[,protocal]) to create a socket using the given address family, socket type, protocol number (default is 0) Socket type Describe Socket.af_unix can only be used for a single inter-

I. OverviewSockets are often referred to as "sockets", which describe IP addresses and ports, are handles to a chain of communication, and applications send requests to the network via a socket or respond to requests from the network.Socket