network protocol testing

network card---serverSome people will say that actually set up a WiFi network agent on the test device phone, but, remember, not all traffic will go to proxy settingsSome people will say that actually running tcpdump on the test device can capture all the traffic, which is correct, but the tester can't see the traffic in real-time, can see is only a series of business operations after the generation of a t

' hwhandler= ' 0 ' WP=RW'-+-policy= ' round-robin 0 ' prio=1 status=active|-6:0:0:1 SDC 8:32 active ready Running # Here you can see that the devices are Active Status'-5:0:0:1 SDB 8:16 active ready Running # Here you can see that the devices are Active Statusanalog NIC failure, verifyingMultipathof theFailoverfunction# Ifdown Eth2 # wait a few seconds after execution to let DM confirm that the IP Path Down offDevice State:3 (Disconnected)# MULTIPATH-LLMar 17:12:21 |/etc/multipath.conf line, i

SELENIUM3 has announced that it does not support mobile testing. This is to retreat for the veteran test tool selenium, as the standard for mobile automation testing tools is still in the hands of the selenium team.This article mildly translates this standard, the person who can see understands not to have the translation also to understand, cannot understand the person to turn the hype is also confused.Not

Part1. The most familiar strangersCompared with the TCP/UDP protocol, the HTTP protocol may be more familiar, as everyone can see the http://xxx.com word everywhere. But, reallyThe students who are aware of the HTTP protocol may be just a few, and many people don't even know what "404" means. And this article, it is to let everyone more in-depth understandingNext

First, the production network Advantages: 1, globalized, deployed in the Internet environment 2, the implementation of the code of the smart contract, block calls, can be clearly seen 3. A smart contract deployed in a production environment that can be called by any application in the world Disadvantages: 1, any contract execution will consume the real etheric currency, that is, real cash, not suitable for development, commissioning and

Common Linux Network Tools: Http stress testing AB and linux stress testing The full name of AB is Apache stress, which is a self-built Network stress testing tool of Apache. Compared with LR and JMeter, AB is the simplest and most common Http stress

message transfer process that ultimately completes the delivery of the message data to one or more mailboxes. Rcptto: Identifies the addresses of individual message recipients DATA Receiving SMTP will treat the behavior that follows as mail data to . to identify the end of the data. REST exit/Reset the current message transfer NOOP requires the receive SMTP to do only the OK answer. (For

. One day, the R D department needs to change "OK" to "yes", so 50 script projects need to be changed, therefore, the maintenance volume is too large. 3. What's more, the flexibility and scalability of the recorded script are too poor. The script recording is mainly based on the test case. If the test case is changed, the script also needs to be changed. However, it takes a lot of time to change the script, and the script debugging process consumes a lot of time. Therefore, in general, why do

First, the URL modeThe URL (Uniform Resource Locator) address is used to describe a resource on a network with the following basic format:Scheme specifies the protocol used by the underlying (for example: HTTP,HTTPS,FTP)The IP address or domain name of the host HTTP serverThe default port for the port# HTTP server is 80, in which case the lower number can be omitted. If you use a different port, you must sp

NetBIOS protocol (NetWork Basic Input/Output System). This protocol is developed by IBM and is mainly used for the small LAN of dozens of computers. The NetBIOS protocol is an Application Programming Interface API that can be used by a program on the LAN. It provides a unified command set for the program to request low

Main Features High performance:the load can being distributed on a cluster of client machines Multi-protocols using a plugin system: HTTP, WebDAV, SOAP, PostgreSQL, MySQL, LDAP, Xmpp/jabber, BOSH, MQTT and AMQP is currently supported. SSL is also supported. Several IP addresses can be used on a single machine using the underlying OS IP aliasing OS monitoring (CPU, memory and network traffic) using SNMP, Munin or Erlang agents on remote serve

to start, control, and end a session, including control and management of multiple two-way messages, so that the app can be notified when only part of a continuous message is completed, so that the data that the presentation layer sees is contiguous, and in some cases, data represents the presentation layer if all the data is received by the presentation layer. Example: Rpc,sql and so on. Transport Layer The functionality of this layer includes whether to choose the error recovery

Recently on the server's performance interest, so began to study for a while loadrunner how to do the TCP protocol interactive server performance testing, LoadRunner is not very familiar with, so the beginning also took some detours, will learn the process of recording down, for future reference it.TCP protocol server performance

　　I. Introduction After the program runs, the time protocol (rfc868) is obtained through the network. If it fails to be obtained within five seconds, it will continue to retry after three seconds until it is obtained successfully. After obtaining the time, the program will try to adjust the computer system time. If the adjustment is successful, a message box will pop up: Your computer system time wa

The Transport layer provides communication services to the application layer above it, which belongs to the highest level of the communication section and is also the bottom of the user's function. Two hosts are actually communicating with each other in a two host application process . Communication between application processes is also known as end-to-end communication . The messages of different processes in the application layer are delivered down to the transport layer through different

Tags: col transmission broadcast tip Local computer network Tran technology familySingle shared broadcast channel, if two or more than two nodes simultaneously transmit, will interfere with each other (interference) conflict (collision): Nodes receive two or more signals at the same time → Receive failed! The MAC protocol uses a distributed algorithm to determine how nodes share channels, that is, when deci

Digression: Originally wanted to follow the internet level from the bottom up review these agreements, but today really have to break the case, DHCP has to say!Host from one network to another network, then the structure of IP address will change, today's mainstream has the following several modification scenarios:(a) Change of address:The host changes its address when moving to a new

no total Length field, the IP layer will not know how many bytes in 46 bytes are the contents of the IP datagram.TTL is the maximum number of routers a datagram can pass, he specifies the lifetime of the datagram, theinitial value of the TTL is usually set by the host , once the number of a route it will be subtracted 1, when the field equals 0 o'clock, the datagram will be discarded, and send an ICMP message to notify the source host, This is also a simple algorithm for IP

connected to the target host or on a shared network, IP datagram is directly sent to the target host, otherwise, it is sent to the default vro and forwarded by the vro. Most user systems can be configured as routers. The IP layer has a route table in the memory. When receiving a datagram and sending it, you need to search for the table. When a datagram comes from a network interface, the IP address checks

html resulting to the browser; release tcp connection; browser html Text and display the content; HTTPNon-stateful nature of the ProtocolThe HTTP protocol is stateless (stateless). That is, when the same client accesses a page on the same server for the second time, the server cannot know that the client has visited and the server cannot distinguish between different clients. The stateless nature of http simplifies the design of