Firewalls are necessary even if you have a dial-up Internet connection -- it takes only minutes for a a non-firewalled computer to be infected.
Enweghị njikọ Ịntanetị nwere nchekwa n'enweghị onye - ọ na-ewe naanị oge maka kọmputa na-abụghị nke firewalled ka ọ bụrụ oria.