What's the meaning of the golden key to mining
2. To correct, the size of a subnet can be uniquely calculated from a subnet mask, that is, the number of host addresses. Combined with a certain address in the subnet, we can accurately calculate all the addresses in the subnet (the calculation method refers to various data). Here is the explanation of "a segment of subnet mask" which needs to be discussed
3 "group" management: the concepts of network address and broadcast address have to be mentioned here. Generally speaking, the first address of a subnet is the network address, which represents the whole subnet; The last address is the broadcast address. As the name suggests, packets sent to the broadcast address are sent to all hosts in the subnet
then, suppose that host a sends data to host B, and they are in the same subnet, host a will write the address of B into the destination address field of the packet. In Ethernet, all hosts in the subnet can receive the packet, while only the address of host B matches the destination address of the packet, host B will receive the packet normally, and other hosts will discard the packet
host C sends data to host D, and they do not belong to a subnet. Similarly, host C writes the address of host d into the destination address field of the packet. If there is no host that performs routing function in the subnet of C, the packet will be discarded by all hosts (no host matches the destination address of the packet). If the subnet where C is located contains the host that performs the routing function (it can be an ordinary host, a router or a layer-3 switch), it will send the data packet from another port to the network segment where d host is located according to the set rules (it can be directly transferred or re transferred. The network segment here is the concept of the previous network address), Other hosts in the network segment where host D is located (network, i.e. "group", i.e. "collection") will discard this packet, and host D will receive this packet
sometimes in the same subnet, I want to send the packet to each host, and each host will not discard it, so I write the network address into the destination address field of the packet, so that all hosts in the subnet will receive the packet normally
so as to realize the management of "group"
I hope it doesn't make people more confused. In fact, if you look at the relevant information on the Internet, you can basically understand the twists and turns. Of course, this is my personal understanding. There is no guarantee of complete accuracy. Everything is based on the information.
bus line: No.34, about 6.4km
1. Walk about 680 meters from Jiangsheng road to fenghuocun station on Baishazhou Avenue
2. Take No.34, pass 6 stops, and reach Xiaodongmen station on Zhongshan Road
3. Walk about 620 meters to Wuchang Center for disease prevention in Wuhan City
wish you all the best
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bus line: Metro Line 8 → Metro Line 9, the whole journey is about 18.1km
1. Take Metro Line 8 from people's Square, pass 3 stops, and reach Lujiabang Road Station
2. Take Metro Line 9, pass 11 stops, and reach Qibao station
3. Walk 290 meters to Shanghai Qibao Vanke square
bus line: Metro Line 11 → Metro Line 9, the whole journey is about 19.1km
1. Take Metro Line 11 from Shanghai west station, pass 7 stations, and reach Xujiahui Station
2. Walk about 190m, then transfer to Metro Line 9
3. Take Metro Line 9, pass 6 stations, and reach Qibao station
The correct name should be Qibao Vanke Plaza, which is at 3366 Caobao Road (between Minzhu road and Qishen Road)
basic definition
metaphor is a good way to solve problems; Especially refers to the ecation method that can open people's heart