Linux Network Interface CLI Configuration Quiz

1. Which command adds a default gateway route of 192.168.1.1 to the routing table?

Ip route add default via 192.168.1.1

Route add default gw 192.168.1.1

Both A and B work

Neither command is valid

2. Which command would you use to set a hostname that persists across reboots?

Hostname myhost

Hostnamectl set-hostname myhost

Echo myhost > /etc/hostname

Both B and C work

3. What is the purpose of the 'nmcli' command?

Display network statistics

Control NetworkManager from the command line

Configure firewall rules

Manage kernel routing tables

4. How do you make network configuration changes permanent across reboots on Debian/Ubuntu?

Edit /etc/network/interfaces and restart networking

Use netplan and apply configuration

Run 'systemctl restart network'

Execute 'ifconfig' commands in a script

5. What does the 'ethtool' command allow you to configure?

IP addresses and routes

Network interface speed, duplex, and driver settings

Firewall rules

DNS resolution

6. Which command shows all open network connections and listening ports?

Netstat -tuln

Ss -tuln

Both A and B work

Lsof -i

7. What is NetworkManager primarily used for in Linux systems?

Kernel-level packet filtering

Dynamic network configuration and connection management

Firewall rule management

DNS server administration

8. How do you check the MAC address of an interface using the ip command?

Ip link show eth0

Ip addr show eth0

Ip mac show eth0

Ifconfig eth0

9. Which file stores DNS resolver configuration on most Linux systems?

/etc/resolv.conf

/etc/named.conf

/etc/hosts

/etc/dnsmasq.conf

10. What is the purpose of the 'ip link' command in Linux networking?

Manage IP addresses

Display and configure network interfaces at Layer 2

Manage routing tables

Configure DNS settings

11. Which command displays the current IP configuration and network interface status on modern Linux systems?

Ip addr show

Ifconfig -a

Netstat -i

Route -n

12. What does the /24 notation represent in CIDR notation?

24 bits for host addresses

24 bits for network addresses

24 devices on the network

Class C network address

13. Which tool is used to test network connectivity to a remote host?

Ping

Traceroute

Netstat

Arp

14. How do you view the routing table and determine the default gateway?

Route -n or ip route show

Netstat -rn

Ip route list

All of the above

15. Which file should be edited to set a static IP address on a RHEL 8 system using NetworkManager?

/etc/sysconfig/network-scripts/ifcfg-eth0

/etc/NetworkManager/conf.d/

/etc/netplan/00-installer-config.yaml

/etc/network/interfaces

16. What does DHCP stand for in network configuration?

Dynamic Host Configuration Protocol

Direct Host Communication Protocol

Distributed Hosting Control Program

Dynamic Hardware Configuration Protocol

17. Which command brings an interface up after it has been administratively down?

Ip link set eth0 up

Ifup eth0

Ip addr add 0.0.0.0 dev eth0

Systemctl restart network

18. How do you temporarily assign an IP address 192.168.1.100/24 to interface eth0?

Ip addr add 192.168.1.100/24 dev eth0

Ifconfig eth0 192.168.1.100 netmask 255.255.255.0

Both A and B work

Neither command is valid

19. Which tool is used to manage network configuration in Ubuntu 18.04 and later using YAML syntax?

Systemd-networkd

NetworkManager

Netplan

Wpa_supplicant

20. What is the primary configuration file location for persistent network settings on RHEL/CentOS systems?

/etc/network/interfaces

/etc/sysconfig/network-scripts/

/etc/netplan/

/etc/config/network

Linux Network Pro Configuring Network Interfaces via CLI Quiz

1. Which command adds a default gateway route of 192.168.1.1 to the routing table?

2.

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

2. Which command would you use to set a hostname that persists across reboots?

3. What is the purpose of the 'nmcli' command?

4. How do you make network configuration changes permanent across reboots on Debian/Ubuntu?

5. What does the 'ethtool' command allow you to configure?

6. Which command shows all open network connections and listening ports?

7. What is NetworkManager primarily used for in Linux systems?

8. How do you check the MAC address of an interface using the ip command?

9. Which file stores DNS resolver configuration on most Linux systems?

10. What is the purpose of the 'ip link' command in Linux networking?

11. Which command displays the current IP configuration and network interface status on modern Linux systems?

12. What does the /24 notation represent in CIDR notation?

13. Which tool is used to test network connectivity to a remote host?

14. How do you view the routing table and determine the default gateway?

15. Which file should be edited to set a static IP address on a RHEL 8 system using NetworkManager?

16. What does DHCP stand for in network configuration?

17. Which command brings an interface up after it has been administratively down?

18. How do you temporarily assign an IP address 192.168.1.100/24 to interface eth0?

19. Which tool is used to manage network configuration in Ubuntu 18.04 and later using YAML syntax?

20. What is the primary configuration file location for persistent network settings on RHEL/CentOS systems?