Firewalls...?

Question

a. are always hardware systems

b. are always software systems

c. may allow public access to selcted files

d. are always based on the application gateway methology

Thanks.=]

Answer 1

d

Answer 2

I almost said it was b and d but then i checked and there are hardwaree firewalls. I havent heard of them befor so thanks you for making me check in a way ive learnt something id give ytou ten points if a could...but i can

>D<