1. Which of the following statements is true?
   A. iptables is the easiest firewall system to work with.
   B. With iptables, any rule that you create applies to both IPv4 and IPv6.
   C. With iptables, you have to create IPv6 rules separately from IPv4 rules.
   D. With ufw, you have to create IPv6 rules separately from IPv4 rules.
2. What is the official name of the Linux firewall?
   A. iptables
   B. ufw
   C. nftables
   D. netfilter
3. With ufw, everything you'll ever need to do can be done with the ufw utility.
   A. True
   B. False
4. Which iptables command would you use to see how many packets have been dropped by a particular rule?
5. Which of the following ufw commands would you use to open the default Secure Shell port?
   A. sudo ufw allow 22
   B. sudo ufw permit 22
   C. sudo ufw allow 22/tcp
   D. sudo ufw permit 22/tcp
6. In iptables, which of the following targets would cause packets to be blocked without sending a notification back to the source?
   A. STOP
   B. DROP
   C. REJECT
   D. BLOCK
7. Which of the following six choices are tables in iptables?
   A. netfilter
   B. filter
   C. mangle
   D. security
   E. ip6table
   F. NAT