Which security measure limits the access of outsiders to the internal network of a business? a) data encryption b) computer firewall c) antivirus programs d) spyware protection

Which security measure limits the access of outsiders to the internal network of a business? Data encryption. When you encrypt your data, there is less chance for an outsider to get in a retrieve your information. Encrypting something uses an algorithm to generate cipher text that can only be read if a person has access to that information. Most businesses use something of sorts to keep high security on information they do not want to get out. 

Ithink the most approximate answer would be b.i hope it you!