A Transmission Control Protocol (TCP) connection is established and two devices ensure that they're speaking the same protocol. What has occured? A. Three-way handshake
B. Two-way handshake
C. Handshake
D. Four-way handshake

The correct option is;

A. Three-way handshake

Explanation:

For establishment of connection within Transmission Control Protocol, (T. C. P.), involves a three-way way handshake. Prior to attempting a server connection, the server to which connection is sought passively opens a port by listening at the port. Upon establishment of passive open, active open by the client can then be initiated by the client. A connection establishment requires a three-way handshake as follows;

1. The client sends a SYN to the server

2. The server responds by sending a SYN-ACK

3. The client further responds sending ACK back to the server.

add the following

answer is:

a). backstage view

explanation:

backstage view is the area where files and data about them is managed— creating, saving, printing, sending to others, inspecting for hidden metadata or personal information, and setting options. so in this way we can add many things to our document swiftly.

i hope you get the idea.