Answer:
Border Gateway Protocol is a protocol the routers use to determine the most optimal path to forward the traffic.
Explanation:
BGP is a path vector protocol which chooses the most optimal path. The protocol decides core routing decisions based on path, configuration and network.
This protocol gives all the notification about the status of the connection and router.
It is used to routing in an autonomous system and provides ways to measure the effectiveness of configuration.
Answer:
See Explanation
Explanation:
I'll assume the question is about the use of constants in QBasic because consonants do not have any special function or usage in QBasic.
In simple terms: In QBasic, constants are used to represent elements that do not change in value during program execution.
Take for instance, you intend to use
in your program.
Its value is 
So, 3.142 will always be a constant in your program. One of the ways it can be used in a program is:
10 LET PI = 3.142
<em>The above represents a numeric constant. QBasic also have string constants.</em>