For example, blockchain distributed ledger

1. That's a good question. Let me give you an example. For example, when I deposit 100 yuan in the bank, the data of this deposit is only recorded in the bank's database, which can't be obtained by others, namely "central bookkeeping". The blockchain is a distributed accounting, a new information recording technology, and it is "encrypted" and "distributed". The data does not exist in a center, but is stored once on the computer of the whole network. For example, if I transfer 100 yuan to you, I will shout to all the computers in the whole network. Let's record the accounts together, that is, "Distributed Accounting".

2. Blockchain technology is also known as distributed ledger. Generally speaking, if we assume that the database is an ledger, reading and writing the database can be regarded as a kind of bookkeeping behavior. The principle of blockchain technology is to find the fastest and best person for bookkeeping in a period of time, and then send this page of information of the ledger to everyone else in the whole system. This is equivalent to changing all the records in the database and sending them to every other node in the whole network, which can not only ensure the data security, but also ensure the authenticity of the data, so as to enhance the social credit.

3. Bookkeeping means mechanisms such as distributed bookkeeping, collective agreement and intelligent consensus. Blockchain technology presents information processing characteristics such as centralization, open sharing, authenticity and reliability, which has aroused increasing attention and application in the financial field, especially in the field of Internet finance. There are many blockchain system development companies. Blockchain technology development enterprises like Renren chain are reliable. You can learn more about them

4. For the benefits, jinwowo feels that the biggest benefit is to obtain great security. First of all, there is a central ledger, so it cannot be destroyed. As like as two peas, each node is only part of the system, and each node has the same rights. Destroying some nodes has no effect on the system at all. Secondly, you can't cheat, because unless you can control most people's computers in the system to make changes, the system will refer to the opinions of most people to decide what is the real result. As a result, it will find that it is totally meaningless to modify your own account book (because others don't admit it). Secondly, since there is no centralized intermediary, making everything run automatically through preset proceres can not only greatly rece costs, but also improve efficiency. Since everyone has the same account book, it can ensure that the process of account book recording is open and transparent.

5. Blockchain is a public accounting mechanism
blockchain is decentralized, tamper resistant and anonymous
the blockchain system is actually a distributed system
bitcoin system is the earliest blockchain system and the simplest blockchain system
the whole bitcoin system is actually a distributed ledger. This ledger is backed up on each node. When a transaction occurs, it will be broadcast to the network. The miner node (the node solving the problem) in the network will mine (the node solving the problem) to record the transaction. The recorded block will be broadcast to the network, and other nodes will verify and synchronize to their own node's account book.

6. Here is about what blockchain is, but if Xiao wants to have a deep understanding of blockchain, he still needs to read more relevant articles
blockchain is a decentralized distributed ledger. Blockchain is not something. You can think of it as the Internet. No one will think that the Internet is an object. Blockchain is a new model. If we think of it as an account book, it means that all transaction information is in this book. Due to the characteristics of decentralization, it is not subject to the jurisdiction of a third party

blockchain is a decentralized database in essence. Once the contents in the database are recorded in the chain, they cannot be tampered with, and all the contents can be traced back to their source. The centralized procts may be tampered by the jurisdictional party. Therefore, blockchain traceability is also commonly used to trace the source of goods
there is still a lot of knowledge about blockchain, which is just a simple concept. In depth understanding, we need to take time to look at the news and learn about its landing applications. We can see more about password finance.

7. The three levels are pyramid type, and several switches are connected below the core layer. If the core ports are not enough, they need to be stacked
our school's core uses Nortel 8610, and the expansion only needs to add interfaces. Generally, the core is tested by moles, and adding ports only needs to add moles instead of stacking
an optical switch can be connected under the core, and several layer-2 switches can be connected under the optical switch, which can also save the core port, rece the cost and increase the network users
the specific situation also depends on whether the ports of your core are enough, as well as the core bandwidth, the number of convergence layers, and so on.

8.

This is a data center switch, which supports virtualization, that is VSU. Configuration reference

core switch 1:

Switch1 # configuration terminal
enter configuration commands, one per line. End with cntl / Z.

Switch1 (config) # switch virtual domain 1

Switch1 (config vs domain) # switch 1

Switch1 (config vs domain) # switch 1 priority 200 -- & gt; The default priority is 100, which is configured as a higher priority. After the VSU is successfully established, it will become the management host

Switch1(config-vs-domain)# exit

Switch1(config)# vsl-aggregateport 1 ------> At least two VSL links are needed, and the reliability of one link is low. When link oscillation occurs, VSU will be very unstable

Switch1(config-vsl-ap-1)# port-member interface TenGigabitEthernet 1/1 ------> Configure VSL link, heartbeat link and traffic channel between VSU active and standby cores

Switch1 (config-vsl-ap-1) ﹥ port member interface tengigabit Ethernet 1 / 2
Switch1 (config-vsl-ap-1) ﹥ exit

core switch 2:

switch2 ﹥ configuration terminal
enter configuration commands, one per line. End with CNTL/Z.

Switch2(config)# switch virtual domain 1 ------> Domain ID must be consistent with the first one

switch2 (config vs domain) # switch 2 ----- & gt; The second device must change its ID to 2

switch2 (config vs domain) ｛ switch 2 priority 150

switch2 (config vs domain) ｛ exit
switch2 (config) ｛ VSL aggregateport 1 ----- & gt; At least two VSL links are needed, and the reliability of one link is low. When link oscillation occurs, VSU will be very unstable

Switch2(config-vsl-ap-1)# port-member interface TenGigabitEtherne 1/1 ------> Configure VSL link, heartbeat link and traffic channel between VSU active and standby cores

switch2 (config-vsl-ap-1) # port member interface tengigabit Ethernet 1 / 2
switch2 (config-vsl-ap-1) # exit

9.

Distributed accounting technology is a database distributed on multiple nodes or computing devices. Each node can and save a ledger, and each node can update independently. Its feature is that the ledger is not maintained by any central organization, and the update of the ledger is built and recorded by each node independently

The

node can vote on these updates to ensure that they are in line with the majority opinion. This kind of voting is also called consensus, and consensus is automatically reached through the algorithm. Once a consensus is reached, the distributed ledger will update itself, and the latest agreed version of the ledger will be saved on each node

distributed accounting technology solves the problem of trust cost, which is less dependent on banks, government and Justice Department, and the data is all on nodes. At the same time, it also solves the problems of consumer rights, financial integrity and transaction speed

extended data:

distributed ledger is a kind of database shared, copied and synchronized among network members. Distributed ledgers record transactions between network participants, such as the exchange of assets or data. This shared ledger eliminates the time and expense of mediating different ledgers

distributed ledger (also known as shared ledger, or distributed classification technology) is a replication consensus, sharing and synchronizing digital data geographically distributed in multiple websites, countries, or institutions. There is no central administrator or centralized data storage.

a point-to-point network is required, and consensus algorithms are used to ensure replication at nodes. A form of distributed classification design, blockchain system, can be public or private

but not all distributed accounts must use chain blocks to provide security and effectively realize distributed consensus: blockchain is just a type of data structure, which is considered as a distributed ledger. In 2016, many banks tested the balance of payments account

the participants in the network restrict and negotiate the updating of the records in the account book according to the consensus principle. There is no intermediate third-party arbitration institutions (such as financial institutions or clearing houses) involved. Each record in the distributed Ledger has a time stamp and a unique password signature, which makes the ledger an auditable history of all transactions in the network