Linux Network Configuration (Linux+) Quiz

1. Which file typically stores persistent network configuration in RHEL/CentOS?

/etc/sysconfig/network-scripts/

/etc/network/interfaces

/etc/netplan/

/etc/hostname

2. True or False: You need root privileges to use the ip and nmcli commands.

True

False

3. Which command activates a saved nmcli connection profile?

Nmcli connection up profilename

Nmcli activate profilename

Nmcli connect profilename

Nmcli enable profilename

4. True or False: nmcli can manage both Ethernet and WiFi connections.

True

False

5. Which metric value in the routing table indicates priority?

Lower metric = higher priority

Higher metric = higher priority

Metric does not affect priority

Metric only applies to static routes

6. True or False: The ip command changes are persistent across reboots by default.

True

False

7. What command removes an IP address from an interface?

Ip addr del 192.168.1.10/24 dev eth0

Ip addr remove 192.168.1.10 eth0

Ip delete 192.168.1.10 from eth0

Ip addr flush eth0

8. What is the primary function of nmcli connection?

Manage saved network connection profiles

Display real-time network traffic

Configure firewall rules

Monitor DNS resolution

9. How do you bring down a network interface using the ip command?

Ip link set eth0 down

Ip down eth0

Ip interface eth0 disable

Ip eth0 shutdown

10. Which command shows the current routing table in Linux?

Ip route show

Route -n

Netstat -rn

All of the above

11. What does CIDR notation like /24 represent?

The number of bits in the network mask

The number of available IP addresses

The subnet broadcast address

The routing priority level

12. How do you add a default route using the ip command?

Ip route add default via 192.168.1.1

Ip default 192.168.1.1

Ip gateway add 192.168.1.1

Ip route set default 192.168.1.1

13. What is the purpose of the default gateway in network routing?

Forwards packets to destinations outside the local subnet

Blocks unauthorized traffic

Encrypts all outgoing packets

Manages DHCP lease renewal

14. Which command assigns a static IP address to an interface using the ip tool?

Ip addr add 192.168.1.10/24 dev eth0

Ip set address 192.168.1.10 eth0

Ip configure 192.168.1.10 dev eth0

Ip assign 192.168.1.10/24 to eth0

15. What does nmcli stand for in NetworkManager?

Network Management Command Line Interface

Network Module Configuration Link

Network Monitor CLI

Network Manage Command Library

16. Which command displays the IP address and network configuration of all interfaces?

Ip addr show

Ifconfig -a

Netstat -i

Route -n

17. Which nmcli command displays all available WiFi networks?

Nmcli device wifi list

Nmcli wifi show

Nmcli connection wifi

Nmcli scan networks

18. How do you create a new nmcli connection profile named 'mynet'?

Nmcli connection add con-name mynet type ethernet

Nmcli create mynet ethernet

Nmcli profile new mynet

Nmcli connection new mynet type eth

19. What is the purpose of the 'scope' parameter in ip address commands?

Defines address visibility: global, link, or host

Limits the number of connections

Restricts traffic to specific subnets

Sets the address lease duration

20. What does the 'dev' parameter specify in ip commands?

The network interface to operate on

The device driver version

The development mode setting

The device's default gateway

Linux Network Quiz: Can You Master ip, nmcli & routing?

1. Which file typically stores persistent network configuration in RHEL/CentOS?

2.

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

2. True or False: You need root privileges to use the ip and nmcli commands.

3. Which command activates a saved nmcli connection profile?

4. True or False: nmcli can manage both Ethernet and WiFi connections.

5. Which metric value in the routing table indicates priority?

6. True or False: The ip command changes are persistent across reboots by default.

7. What command removes an IP address from an interface?

8. What is the primary function of nmcli connection?

9. How do you bring down a network interface using the ip command?

10. Which command shows the current routing table in Linux?

11. What does CIDR notation like /24 represent?

12. How do you add a default route using the ip command?

13. What is the purpose of the default gateway in network routing?

14. Which command assigns a static IP address to an interface using the ip tool?

15. What does nmcli stand for in NetworkManager?

16. Which command displays the IP address and network configuration of all interfaces?

17. Which nmcli command displays all available WiFi networks?

18. How do you create a new nmcli connection profile named 'mynet'?

19. What is the purpose of the 'scope' parameter in ip address commands?

20. What does the 'dev' parameter specify in ip commands?