Linux Networking (Linux+) Quiz: ip, ss & firewalld

1. True or False: firewalld uses iptables rules directly and cannot coexist with iptables.

True

False

2. To add a port to firewalld's public zone permanently, which syntax is correct?

Firewall-cmd --add-port=8080/tcp --zone=public

Firewall-cmd --permanent --add-port=8080/tcp --zone=public

Firewall-cmd --zone=public --add-port 8080

Firewall-cmd --add 8080 tcp public

3. Which ss command option displays extended socket information and timer details?

-o

-e

-d

-x

Submit

5. Which command lists all available firewalld zones?

Firewall-cmd --list-zones

Firewall-cmd --get-zones

Firewall-cmd --show-zones

Firewall-cmd --zones

6. True or False: The 'ss -n' flag shows numerical addresses without hostname resolution.

True

False

7. To display only IPv6 addresses using the ip command, which option is correct?

Ip -6 addr show

Ip addr show ipv6

Ip -v6 addr

Ip addr ipv6

8. Which firewalld command reloads the firewall configuration without losing established connections?

Firewall-cmd --reload

Firewall-cmd --restart

Firewall-cmd --refresh

Firewall-cmd --reset

Submit

10. What is the primary purpose of the 'ip netns' command?

Configure network namespaces

Display network statistics

Manage firewall rules

List active network services

11. Which command displays all active network connections and listening sockets on a Linux system?

Ip addr show

Ss -tuln

Netstat -a

Ifconfig -a

12. Which ss flag displays the process name and PID associated with a socket?

-p

-n

-e

-m

Submit

14. To enable a firewalld service permanently, which command should you use?

Firewall-cmd --add-service=http

Firewall-cmd --permanent --add-service=http

Firewall-cmd --enable-service http

Systemctl enable firewalld http

15. What does the '-i' flag in the ip command show?

Incoming traffic statistics

Interface statistics and details

IP routing information

Interface configuration files

16. True or False: The 'ss' command is a modern replacement for 'netstat'.

True

False

17. Which of the following is a valid firewalld service file location?

/etc/firewall/services/

/usr/lib/firewalld/services/

/var/firewalld/

/opt/firewalld/services/

Submit

19. Which flag in the ss command filters output to show only TCP listening sockets?

-u

-l

-t

-p

20. What does the 'ip addr add' command do?

Removes an IP address from an interface

Assigns a new IP address to a network interface

Displays routing table information

Configures DNS resolver settings

Linux Networking Quiz: Can You Master ip, ss & firewalld?

1. True or False: firewalld uses iptables rules directly and cannot coexist with iptables.

2.

What first name or nickname would you like us to use?

2. To add a port to firewalld's public zone permanently, which syntax is correct?

3. Which ss command option displays extended socket information and timer details?

4. The 'ip addr flush' command removes all addresses from a ____.

5. Which command lists all available firewalld zones?

6. True or False: The 'ss -n' flag shows numerical addresses without hostname resolution.

7. To display only IPv6 addresses using the ip command, which option is correct?

8. Which firewalld command reloads the firewall configuration without losing established connections?

9. The ss command with the '-s' flag provides ____.

10. What is the primary purpose of the 'ip netns' command?

11. Which command displays all active network connections and listening sockets on a Linux system?

12. Which ss flag displays the process name and PID associated with a socket?

13. The 'ip link set' command is used to modify ____.

14. To enable a firewalld service permanently, which command should you use?

15. What does the '-i' flag in the ip command show?

16. True or False: The 'ss' command is a modern replacement for 'netstat'.

17. Which of the following is a valid firewalld service file location?

18. The 'ip route' command is primarily used for managing ____.

19. Which flag in the ss command filters output to show only TCP listening sockets?

20. What does the 'ip addr add' command do?