LPIC 2 Network Configuration and Troubleshooting

1. What is the primary purpose of the /etc/resolv.conf file?

Configure DNS nameserver addresses

Define static IP addresses

Store DHCP lease information

Configure firewall rules

2. Which command tests connectivity to a remote host by sending ICMP echo requests?

Ping

Netstat

Ifconfig

Traceroute

3. What does netstat -tlnp display?

All listening TCP sockets with process names

UDP connections only

Active SSH sessions

Firewall rules

4. What is the primary function of a gateway in network configuration?

Route packets between different networks

Assign IP addresses

Resolve domain names

Filter malware

5. Which protocol is used for secure shell remote access on port 22?

SSH

Telnet

FTP

HTTP

6. Which command adds a static route to the routing table on modern Linux systems?

Ip route add

Route add

Netstat -r add

Routeadd

7. Which command shows active network connections and their states?

Netstat or ss

Ping

Traceroute

Ifconfig

8. Which configuration file is used to set up network interfaces on Debian-based systems?

/etc/network/interfaces or /etc/netplan

/etc/ifcfg-eth0

/etc/sysconfig/network

/etc/hosts

9. What is the purpose of iptables in network configuration?

Manage firewall rules and packet filtering

Configure IP addresses

Resolve DNS queries

Assign DHCP leases

10. Which tool is used to trace the path packets take to a destination host?

Traceroute or tracert

Ping

Ifconfig

Arp

11. What does the ip command with the 'link' option allow you to do?

Manage network interface properties

View routing tables

Configure DNS servers

Check DHCP status

12. What is the default port number for DNS queries?

Port 53

Port 80

Port 443

Port 25

13. Which command displays network interface information including IP and MAC addresses?

Ifconfig or ip addr show

Netstat

Route

Arp -a

14. Which command displays the current routing table on a Linux system?

Route -n

Netstat -r

Ip route show

All of the above

15. What does the subnet mask 255.255.255.0 represent in CIDR notation?

/24

/16

/8

/32

16. What is the default metric value used in route calculations?

0

1

10

100

17. Which file contains static hostname-to-IP mappings on Linux?

/etc/hosts

/etc/hostname

/etc/network/interfaces

/etc/resolv.conf

18. Which protocol is used by DHCP servers to assign IP addresses dynamically?

UDP port 67 and 68

TCP port 80

ICMP

TCP port 443

19. What is the purpose of ARP (Address Resolution Protocol)?

Map IP addresses to MAC addresses

Resolve domain names to IP addresses

Establish TCP connections

Manage DHCP leases

20. What is the purpose of the default gateway in a network configuration?

Route packets to networks not directly connected

Filter incoming traffic

Assign local IP addresses

Resolve hostnames

LPIC 2 Network Configuration and Troubleshooting Quiz

1. What is the primary purpose of the /etc/resolv.conf file?

2.

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

2. Which command tests connectivity to a remote host by sending ICMP echo requests?

3. What does netstat -tlnp display?

4. What is the primary function of a gateway in network configuration?

5. Which protocol is used for secure shell remote access on port 22?

6. Which command adds a static route to the routing table on modern Linux systems?

7. Which command shows active network connections and their states?

8. Which configuration file is used to set up network interfaces on Debian-based systems?

9. What is the purpose of iptables in network configuration?

10. Which tool is used to trace the path packets take to a destination host?

11. What does the ip command with the 'link' option allow you to do?

12. What is the default port number for DNS queries?

13. Which command displays network interface information including IP and MAC addresses?

14. Which command displays the current routing table on a Linux system?

15. What does the subnet mask 255.255.255.0 represent in CIDR notation?

16. What is the default metric value used in route calculations?

17. Which file contains static hostname-to-IP mappings on Linux?

18. Which protocol is used by DHCP servers to assign IP addresses dynamically?

19. What is the purpose of ARP (Address Resolution Protocol)?

20. What is the purpose of the default gateway in a network configuration?