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DNS:Domain Name Service, domain name resolution serviceListening port: udp/53, tcp/53Application: bindRoot domain:Primary domain:Organization domain: com, .org, .net, .mil, .edu, .gov, .info, .cc, .me, .tvCountry domain: cn, .us, .uk, .jp, .tw, .hk, .iq, .irReverse domain: in-addr.arpaDNS record type: the DNS domain name database consists of re ...

Test purpose Test the interconnection of different network segments through three-layer switchesThe three-layer switch is directly connected to the router to connect the external network to realize the connection between the host and the external network Application scenario The simulation implementation can be used for interconnection of di ...

The methods of interprocess communication described in the previous articles, such as pipeline, shared memory, message queue, etc., all depend on the shared resources of a computer system. These resources include file system space, shared physical memory, or message queues, but they can only be used on the same host. So how can we communicat ...

VMware customers had a very busy week due to the vulnerability of Apache Log4j 2, Nearly half of global enterprises are affected，According to a report provided by the Threat Intelligence Department of Check Point, a well-known network security solution provider , the Apache Log4j 2 vulnerability may persist. This means that VMware customers ha ...

catalogue 1, Multi area OSPF 1.1. Generate OSPF multi area      1.1. 1. Reasons for generating OSPF multi region      1.1. 2. Capacity of OSPF area 1.2 type of router 1.3 type of area 2, Link state database 2.1 composition of link state database 3, OSPF multi zone configuration 3.1 common check commands ...

0. General In a technical sense, because TCP needs to establish a connection, UDP can "throw vegetables" directly Therefore, only TCP protocol has Server server and Client client. For UDP protocol, there is no Server and Client UDP protocol features: UDP is a connectionless and unreliable transmission protocolEncapsulate ...

Portal Simple tutorial for getting started with Android I. installation and use of Android Studio II. Android interface development III. Android network development IV. practical application of dog collection Learning objectives Understanding HTTPUse of OKHttpNetwork data analysis HTTP Wikipedia: https://en.wikipedia.org/wiki/Hypertext ...

In the last blog, the blogger introduced Gateway and its routing assertion factory: Spring Cloud Alibaba: Gateway gateway & route assertion factory At present, Gateway has 24 kinds of routing filter factories. Bloggers intend to introduce these routing filter factories with several blogs. Routing filters allow you to modify incoming HTTP ...

catalogue 1 byte order How to determine the byte order of the current byte 2-byte order conversion function 3 ip address translation function inet_pton / / String ip address to integer data inet_ntop / / convert integer data to string format ip address inet_addr() and inet_ntoa() 4 UDP overview 5 network programming interface socket ...

K8s basic concept pod classification Autonomous pod The self managed pod still needs to be submitted to the apiserver after it is created. After it is received by the apiserver, it is scheduled to the specified node node with the help of the scheduler, and the node starts the podIf this pod fails and the container needs to be restarted, kube ...