The sheave wheel is a pulley wheel that sits above the mine shaft. The hoist cable passes over the sheave wheel and then down the shaft of the mine.
(copied from google)
I would a Standard Access control List
There are two common access lists: The standard and extended access list. With the standard access list, it creates filters only on source addresses and is commonly used for server-based filtering. They are not as powerful as extended access lists. Standard Access lists are typically used for restricting access to a router through HTTP and HTTPS.
Explanation:
Check the type of hard drive installed.
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Answer: I think it’s D
Explanation: the rest apply to the the rules of 1NF and 2NF
B. becasue the repeation of a b and c i assume its not d, for that could be too easy it says REMOVE so that being the key word i ruled out A and C