What is being referred to in the following definition a barrier along the open sides of stair ways and platforms that prevent falling

A stair rail is a guard located along the sides or the open side of a stairway. It is more or less the same as a guard rail of an open stair. In most cases, the height requirements for both stair rails and handrails are identical. A guard rail is located near the open sides of an elevated walking surface and it helps minimize the possibility of a fall.

some have built technology like spoofed call blockers into their networks, so there's nothing you would even have to install.

this happens because the number is known for scamming, they don't want it to me known as "scam likely." perhaps it's just a telemarketer. maybe it's an identity thief. it might even be a scam artist.  

either way, "scam likely" is probably not an old friend whose number you forgot that you saved. it's your wireless carrier's way of letting you know: answer at your own risk.

explanation:

to combat the seemingly rising epidemic of spam callers in the u.s., the nation's four major wireless carriers have been trying out new methods to reduce the number of unsolicited calls americans receive each day.

some have built technology like spoofed call blockers into their networks, so there's nothing you would even have to install.

hope this . mark me brainliest.