A(n) ________ is a user defined marker that identifies the beginning and ending of a piece of data

Software designed to close logical ports in your computer is known as a(n)

a. firewall. b. packet filter. c. anti-malware blocker. d. network address translator.

A function which has a key input and a position output is known as a(n):

A. key function B. position function C. hash function D. instruction function