Answer: hello your question lacks the required option, below are the missing options
A. The transaction data in the tampered block is deleted, and a copy is created with the same hash value.
B. The hash values of transaction data of subsequent blocks are validated, and the chain is broken.
C. The hash value for the entire block is nullified, creating a domino effect on all subsequent blocks.
D. The hash values of subsequent blocks are updated as soon as they are tampered with, and the chain continues.
answer : The hash values of subsequent blocks are updated as soon as they are tampered with, and the chain continues ( D )
Explanation:
What happens if a transaction data is changed in an earlier existing block in a Blockchain is that the Hash values of subsequent blocks will be updated as soon as they are tampered with and the chain will continue.
Blockchain is a specially design system for recording information, hence any change in data inputted in an earlier existing blocks that changes will automatically be updated as well in all preceding blocks.
The radio buttons are used when only one option is to be selected from the several possible choices. Thus, option A is correct.
<h3>What are radio buttons?</h3>
Radio buttons can be understood as the elements of selection a single option amongst the multiple suitable options. The default icon for the radio buttons is the blank circle.
Therefore, option A Radio buttons is correct.
Learn more about radio buttons, here:
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Answer:
The boom of online courses, where anyone can learn from the comfort of one’s own home or office at their own chosen time is the main cause. When online courses made their foray a decade ago, the same question of technology replacing teachers in schools emerged as a major argument. However, if we ask you today whether calculators can replace mathematics teachers at school, what would you say? Sounds weird, right! Do you think calculators which are also a kind of a technological advancement only, are capable enough of themselves, so as to replace the teachers? The answer is obvious. It’s an obvious No!
Explanation:
Windows Firewall
Windows Firewall is a packet filter and stateful host-based firewall that allows or blocks network traffic according to the configuration. A packet filter protects the computer by using an access control list (ACL), which specifies which packets are allowed through the firewall based on IP address and protocol (specifically the port number). A stateful firewall monitors the state of active connections and uses the information gained to determine which network packets are allowed through the firewall. Typically, if the user starts communicating with an outside computer, it remembers the conversation and allows the appropriate packets back in. If an outside computer tries to start communicating with a computer protected by a stateful firewall, those packets are dropped automatically unless access was granted by the ACL.
