Answer:python
Explanation:
it’s a good coding program
Complete Question:
A system has defined specifications that describe how signals are sent over connections. Which layer of the Transmission Control Protocol/Internet Protocol (TCP/IP) model provides this function?
Group of answer choices.
A. Transport
B. Network
C. Data link
D. Physical
Answer:
A. Transport
Explanation:
Transmission Control Protocol/Internet Protocol (TCP/IP) model is a standard communication protocol used for interconnecting network devices such as routers, switches, host computers and access points over the internet.
A system has defined specifications that describe how signals are sent over connections. The layer of the Transmission Control Protocol/Internet Protocol (TCP/IP) model that provides these functions is the transport layer.
The transport layer comprises of two (2) standard protocols and these are TCP and UDP.
TCP is an acronym for Transmission Control Protocol and it is one of the essential and important protocol of the internet protocol network. This simply means that, it is an essential part of the TCP/IP network. The TCP has a wide range of applications in the following areas, file transfers, world wide web, remote administration, e-mail, etc.
The TCP connection are mainly established in the network using the three-way handshake.
UDP is an acronym for user datagram protocol and it enables the transfer or exchange of data between network devices.
Answer:
The correct option is option 4 from the options indicated below:
Explanation:
The options are as given below
1-SELECT customer# FROM customers
UNION
SELECT customer# FROM orders;
2-SELECT customer# FROM orders
MINUS
SELECT customer# FROM customers;
3-SELECT customer# FROM orders
INTERSECT
SELECT customer# FROM customers;
4-SELECT customer# FROM customers
MINUS
SELECT customer# FROM orders;
Option 1 is not correct as it will provide the list of all the customers whether they have placed order or not.
Option 2 is not correct as it will provide the list of customers who have placed order but are not in the customers table. This will return the empty records.
Option 3 is not correct as it will provide the list of customers who have placed the order.
Option 4 is correct as it will provide the list of customers from the CUSTOMERS table which are not in the Orders table. thus the list of customers who have not placed the order yet.
