redis ttl

first, what is the TTL TTL (Time to Live, lifetime) is a value in the IP protocol package, when we use the ping command for network connectivity testing or test speed, the local computer will send packets to the destination host, but some packets for some special reasons can not be properly transmitted to the destination host, If the TTL value is not set, the pa

Recently, I purchased a domain name on Godaddy. I found a TTL item during resolution. I don't understand what it means. Many people on the Internet just ignore it, but I want to figure it out (what is TTL ?), I just collected an introduction to it and shared it with you: 1. What is the domain name TTL value?TTL (tim

1. Environment Construction 1. Install the additional term. The download path is as follows: Http://logmett.com/index.php? /Download/tera-term-469.html 2. Install a running PFC Environment 2. Use the TTL script for Automatic Testing For more information about TTL script naming, see the Help File of limit term. TTL script method: The script is relatively simple

To prevent L2 routing, wayos can be implemented through the simple dial King client. I also described this (Ros can also be used). Next I will explain a simpler method of ROS: Overview: You can set the TTL value to prevent L2 routing. Principle: TTL is a value in the IP protocol package. It tells the network whether the packet is discarded because the time in the network is too long. There are many reasons

Study on Defects of super Cannon (Great Cannon) TTL Some time ago, Github suffered a massive DDoS attack, followed by fierce discussions behind The scenes. Then, American media accused China of possessing a cyber weapon-The super Cannon )". Is the cannon really so powerful as the legend? In this article, let's talk about some of the defects of the cannon. What is a super cannon? The Canadian citizenship laboratory has previously released a technica

TTL expired in transit This morning, something strange happened. The other party cannot remotely connect to the local host. Both parties connect to the Internet through ADSL, and the network status is normal. Run the ping command. The test result is as follows: C: \ Ping 58.33.46.92 Pinging [58.33.46.92] with 32 bytes of data: Reply from 61.152.81.25: TTL expired in transit. Ping statistics for 58

Traceroute uses ICMP and ttl,icmp for Echo information, including ip,ttl,sequence number, and so on. The TTL field is the initial set field of the sender, the RFC specifies a value of 64, for each router that processes the packet needs to reduce the value of TTL 1 or less time spent in the router, the general router fo

Ttl Ttl--transistor-transistor logic, transistor-transistor logic level, in digital circuits, TTL level signals are used most often because the data is usually expressed in binary terms, which is equivalent to the logic "1", 0V is equivalent to the logic "0", The level is a voltage range that specifies the output high-level >2.4v, and the output low-level LVTT

As you know, you can use the Ping and Tracert programs to determine the target host type. The main use of Ping is to check whether the target host can be connected. Tracert uses the TTL value in the ICMP and IP packet headers to prevent data packets from continuously repeating over the IP Internet. Many intruders first Ping your host. If the TTL value is 128, they think that your system is Windows NT/2000;

1, TTL level:The output level is greater than 2.4 V, and the output level is less than 0.4 V. At room temperature, the output high level is generally 3.5 V, and the output low level is 0.2 V. Minimum input height and low level: Input height> = 2.0 V, input low level 2, CMOS level:1 logic level voltage is close to the power supply voltage, 0 logic level is close to 0 V. It also has a wide noise margin.3. Level conversion circuit:Because

TTL refers to the lifecycle of a network-layer package. You can use the echo TTL of ping to determine the operating system of a machine. (Although some system network parameters can be modified, but this value is rarely modified) the following script is relatively simple and must be run on a machine in the target network segment. Details :#! /Bin/sh # Check the entire network segment host system linux/windo

To be honest, my network knowledge has always been poor. I read a book the day before yesterday and accidentally saw the TTL. I used to know nothing but ping the server. TTL indicates the number of routers that pass through the ping process. However, its data is not provided directly, but obtained by subtracting this value from the number of n times (greater than it) nearest to it. For example, if the

First, let's introduce the ping tool.ping [target]is to send a few packets to the target, and then if the target receives a packet, the target returns a packet to the host that sent the ping.For example, I ping Baidu's server (the default ping under Windows 4 times)bytes represent the size of the packet, and the time, as the name implies, is the return time, and here's a bit of TTL:The TTL means the lifetime of the packet, of course you get this is th