BTN mining machine app Download
bitcoin mining machine is a kind of computer used to earn bitcoin. This kind of computer generally has professional mining chips and works in the way of burning graphics card, which consumes a lot of power. It is one of the ways to get bitcoin that users download software from personal computer and then run specific algorithm to get corresponding bitcoin after communicating with remote server
mining is actually a competition of performance and equipment, and a competition of computing power among miners. Miners with more computing power are more likely to dig bitcoin. With the increase of computing power in the whole network, it is more and more difficult to dig bits with traditional devices (CPU, GPU). People have developed chips specially used for mining. Chip is the core part of mining machine. The process of chip operation will proce a lot of heat, in order to cool down, bitcoin miner is generally equipped with heat sink and fan
bitcoin is a kind of virtual currency. Bitcoin mining system is the process of carrying out mathematical operation for bitcoin network through computer hardware. Miners who provide services can get a reward, because the network reward is calculated according to the tasks completed by miners, so the competition for mining is very fierce
bitcoin mining started with low-cost hardware such as CPU or GPU, but with the popularity of bitcoin, the mining process has changed greatly. Nowadays, the mining activities are transferred to the field programmable gate array, and the hash speed can be achieved through optimization. The mining efficiency of this mode is very high
In fact, it's not difficult. When we use mobile phones everyday, there will be some background applications, which will be "killed" after restart. However, if the mobile phone is hacked and rebooted, it will enter a high load state again, and the system running memory will be used up quickly. Therefore, if the mobile phone is stuck, hot or dead for no reason, it may be g
it is possible that hackers steal all the information before using mobile phones to "mine" cryptocurrency. People will not only encounter problems such as cell phone stuck, fever and even crash, but also other financial losses
moreover, it is worth noting that some mobile mining apps, in the name of "mining", allow users to invest money and continue to develop offline
we know that IP address is a 4-byte (32bit) number, which is divided into 4 segments with 8 bits in each segment. The segments are separated by periods. For the convenience of expression and identification, the IP address is expressed in decimal form, such as 210.52.207.2, and the maximum decimal number that each segment can represent is not more than 255. IP address consists of two parts, namely network ID and host ID. The network number identifies a subnet on the Internet, while the host number identifies a host in the subnet. After the Internet address is decomposed into two domains, it brings an important advantage: when IP packets arrive from one network on the Internet to another network, the path selection can be based on the network rather than the host. In the large-scale Internet, this advantage is particularly obvious, because the routing table only stores network information rather than host information, which can greatly simplify the routing table. According to the number of network number and host number, IP address can be divided into three categories: A, B and C:
class a IP address: use 7 bits to identify the network number, 24 bits to identify the host number, and the first one is & quot; 0"， That is, the value of the first segment of A-type address is between 1 and 126. Class a addresses are usually provided for large networks. There are only 126 possible class a networks in the world, and each class a network can connect 16777214 hosts at most
class B IP address: use 14 digits to identify the network number, 16 digits to identify the host number, and the first two digits are & quot; 10" The value of the first segment of class B address is between 128 and 191, and the first segment and the second segment together represent the network number. Class B addresses are suitable for medium-sized networks. There are about 16000 class B networks in the world, and each class B network can connect up to 65534 hosts
class C IP address: use 21 digits to identify the network number, 8 digits to identify the host number, and the first three digits are & quot; 110" The value of the first segment of class C address is between 192 and 223, and the first segment, the second segment and the third segment together represent the network number. The last segment identifies the host number on the network. Class C address is suitable for small networks such as campus network. Each class C network can have 254 hosts at most
from the above introction, we know that IP address is used to identify the host on the network by network number and host number. Only computers under a network number can be & quot; Direct & quot; Interworking: computers with different network numbers can interweave only through gateway. But this kind of division is not very flexible in some cases. For this reason, the IP network is also allowed to be divided into smaller networks, called subnets, which proces a subnet mask. The function of subnet mask is to judge whether any two IP addresses belong to the same subnet or not. At this time, only computers in the same subnet can; Direct & quot; Intercommunication. So how to determine the subnet mask
as mentioned above, IP address is divided into network number and host number. To divide a network into multiple subnets, the network number will occupy the original host bit. For example, for a class C address, it uses 21 bits to identify the network number. To divide it into two subnets, it needs to occupy 1 bit of the original host identification bit. At this time, the network number bit becomes 22, and the host label becomes 7. Similarly, a class C network can be divided into four subnets by borrowing two host bits... How does the computer know whether the network is divided into subnets? This can be seen from the subnet mask. The subnet mask has 32bit as IP address. The way to determine the subnet mask is to use & quot; with all the corresponding bits in IP address to identify the network number; 1"， The bits corresponding to the host number are & quot; 0" If the class C IP address divided into two subnets uses 22 bits to identify the network number, then the subnet mask is 10000000, that is 255.255.255.128. So we can know that the default subnet mask of class a address is 255.0.0.0, class B is 255.255.0.0, and class C is 255.255.255.0. The following table shows the subnet division and related subnet masks of class C addresses:
subnet bits subnet mask number of hosts available
1 255.255.255.128 128 126
2 255.255.255.192 64 62
3 255.255.255.224 32 30
4 255.255.255.240 16 14
5 255.255.255.248 8 6
6 255.255.255.252 4 2
< br/ >You may notice that there are two items in the table: the number of hosts and the number of available hosts. Why? Because when all the host bits of the address are & quot; 0" When all the host bits are & quot; 1" Is the broadcast address
at the same time, we can also use variable length mask (VLSM), which means that a network can be configured with different masks. The purpose of this is to make it more convenient to divide a network into multiple subnets. Without VLSM, a network can only use one subnet mask, which limits the number of hosts in a given number of subnets. For example, you are assigned a class C address with a network number of 192.168.10.0, and now you need to divide it into three subnets, one of which has 100 hosts, and the other two subnets have 50 hosts. We know that a class C address has 254 available addresses, so how do you choose the subnet mask? From the above table, we find that this problem cannot be solved when we use a subnet mask in all subnets. At this time, VLSM is in use. We can use the mask 255.255.255.128 in the subnet of 100 hosts. It can use the 128 IP addresses 192.168.10.0 to 192.168.10.127, of which 126 can be used. We then divide the remaining 128 IP addresses from 192.168.10.128 to 192.168.10.255 into two subnets with a subnet mask of 255.255.255.192. The address of one subnet ranges from 192.168.10.128 to 192.168.10.191, and the address of the other subnet ranges from 192.168.10.192 to 192.168.10.255. The subnet mask is 255.255.255.192, and each subnet has 62 available host addresses, which meets the requirements. It can be seen that reasonable use of subnet mask can make IP address more convenient for management and control (Xiao Qiutao)