Answer:
a.The server's IP address or hostname.
d.The port number for the application on that server
Explanation:
We can point out that a socket is a tool which contains or which comprises of a pair of value.
Also a socket is an end point which identifies each other. In this case the client connecting to the server.
From the options a and d meets the criteria.
1. A - everything starts there
2. D - always
3. C - true
Ex:
FOR Count= 1 TO 50
.......................
Body
......................
NEXT
Next keeps incrementing count by 1
Hope it helps
https://www.google.com/url?sa=t&source=web&rct=j&url=https://support.office.com/en-us/article/video-create-a-network-diagram-a2360cd9-5c9d-4839-b4f6-17b485e02262&ved=2ahUKEwjlr4bdjd7hAhUiyYUKHR1UC1EQwqsBMAB6BAgLEAU&usg=AOvVaw3ZFpgzww1z4gFaeRCROkF-