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. 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

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

Ping

Netstat

Ifconfig

Traceroute

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 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

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

Manage firewall rules and packet filtering

Configure IP addresses

Resolve DNS queries

Assign DHCP leases

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

Netstat or ss

Ping

Traceroute

Ifconfig

9. 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

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

Ip route add

Route add

Netstat -r add

Routeadd

11. What does netstat -tlnp display?

All listening TCP sockets with process names

UDP connections only

Active SSH sessions

Firewall rules

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

/24

/16

/8

/32

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

Traceroute or tracert

Ping

Ifconfig

Arp

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

Port 53

Port 80

Port 443

Port 25

15. 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

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

/etc/hosts

/etc/hostname

/etc/network/interfaces

/etc/resolv.conf

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

UDP port 67 and 68

TCP port 80

ICMP

TCP port 443

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

Ifconfig or ip addr show

Netstat

Route

Arp -a

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

0

1

10

100

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

Route -n

Netstat -r

Ip route show

All of the above

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

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

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

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

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

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

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

11. What does netstat -tlnp display?

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

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

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

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

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

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

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

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

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