Answer:
Physical / Data link layer
Explanation:
If two computers (A & B) are directly connected through Ethernet cable. A is sending data to B, the data would be transmitted if the network is clear but if the network is not clear, the transmission would wait until the network is clear.
The Open Systems Interconnection model (OSI model) has seven layers each with its own function.
The physical layer is the first layer responsible for data transmission over a physical link. The data packets are converted to signals over a transmission media like ethernet cable.
The data link layer is the second layer in the OSI layer responsible for transmission of data packets between nodes in a network. It also provides a way of detecting errors and correcting this errors produced as a result of data transmission.
Answer:
The uncertainty of inventiveness and futuristic ideas usually deal with science and technology.
Inventibility is something uncertain which promotes a risk in any system in which it is inserted. With that, we can naturally associate it with the maintenance of science and technology, because both are in need of inventing new creations, which may or may not be effective for the defeat of uncertainties and the creation of certainties.
This is usually linked to futuristic ideas, which may not fit in today's society, but which impose improvements, or not, for societies in the future. Leading to the creation of more technologies and more sciences.
Answer:
The query is as follows:
select sum(stock) as total_stock from products
Explanation:
Required
Return total stock using the alias total_stock from the product table.
The explanation of the query is as follows:
select ----> This implies that data is to be selected from the table
sum(stock) ----> This adds up entries in stock column
as total_stock ---> This represents the alias used for sum(stock)column where
from products ----> The table being queried
Take for instance, the content of the table is:
SN Product Stock
1 Apple 5
2 Orange 3
3 Banana 8
The query will return the following table:
total_stock
16
[B] True.
In something like Microsoft Publisher, you are able to go to Insert -> Table, and specify the dimensions for the table you want.
