Programming VIP

Understanding how the DHCP protocol works DHCP (Dynamic Host Configuration Protocol) provides the ability to dynamically configure IP addresses.In a DHCP network, clients no longer need to enter network parameters themselves, but are automatically assigned to clients by the DHCP server. IP Address Rental Process IP Lease Request IP Rental Pro ...

Introduction to DNS DNS (Domain Name System) Domain Name System: It is a system that uses client/server mechanism to translate computer name to IP address.As an important network service, DNS is not only the basis of the work of the international Internet, but also widely used in the internal network of enterprises. Role of DNS Server Forward R ...

There are two requirements in the recent project (vue Series). Here is a record to share with you. Polling by native Table list Demand: Do not poll when the number of table lists is small, and only poll when the number exceeds a certain height; Move the mouse in to pause polling, move out to continue polling First, the prototype is as follows ...

Recently, there is a need to crawl the official website information of a logistics company. I saw the official website, which is basically static pages. Unlike that kind of information type, e-commerce type websites have complex results, strict anti climbing, many AJAX, and I am secretly glad that when I further analyzed, I found that they are ...

I. understanding reflection (three ways to realize reflection) 1. Instantiate the object first, and then reflect it Date date = new Date(); //The generics here can only be "?" Class<?> dts = date.getClass(); System.out.println(dts.getName()); 2. First import the package of the class, and then reflect import ...

Definition of if expression: in Scala, if expression has value, which is the return value of the last statement in if or else expression. object IfDemo { def main(args: Array[String]): Unit = { val age = 28 val isAdult = if (age > 25) 1 else 0 println(isAdult) } } Type inference of if expression: because if ...

Reasonable use of local cache can effectively reduce network overhead and response delay. The HTTP header also defines many cache related domains to control the cache. Let's talk about the implementation details of the cache part in OkHttp today. HTTP cache policyFirst of all, let's understand the related domains of the cache part in the HTTP p ...

1. Deploy flannel 1.1 Install flannel kubernetes requires that nodes in the cluster, including master nodes, be interconnected through the Pod segment.flannel uses vxlan technology to create an inter-operable od network for each node, using UDP 8472 as the port. The first time flanneld starts, it gets the configured PD segment information ...

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I. deployment of flannel 1.1 installation of flannel kubernetes requires that all nodes in the cluster (including the master node) can be interconnected through the Pod network segment. flannel uses vxlan technology to create an interoperable Pod network for each node. The port used is UDP 8472. When flanneld is started for the first time, ...