System Startup

Question 1 of 50

1. Question

An administrator wants to configure the IP address of an ethernet interface on a temporary basis without making changes to any configuration files. Which utility allows the administrator to achieve this without needing to restart the networking service?

```
ifconfig
```
```
netplan
```
```
networkctl
```
```
nmtui
```

Question 2 of 50

2. Question

A server administrator wants to disable the “eth0” ethernet interface on a Linux server. Which command would achieve this task directly?

```
ip addr del eth0
```
```
ip link set eth0 down
```
```
route del eth0
```
```
netstat -r eth0
```

Question 3 of 50

3. Question

A system administrator needs to list the available wireless networks for a wireless interface named “wlan0”. Which command would directly provide this information?

```
iw wlan0 scan
```
```
ifconfig wlan0 scan
```
```
wpa_cli scan_results
```
```
netstat -i wlan0
```

Question 4 of 50

4. Question

An administrator wants to connect to a wireless network named “HomeWiFi” using WPA2 security. Which file would the administrator typically need to modify in order to provide the SSID and passphrase for the network?

```
/etc/network/interfacesl
```
```
/etc/wpa_supplicant.confl
```
```
/etc/wireless/networksl
```
```
/etc/netplan/wifi.yaml
```

Question 5 of 50

5. Question

You are asked to replace the deprecated ifconfig command to determine the IP address, subnet mask, and broadcast address of all currently active network interfaces on your Linux system. Which command would you use?

```
ip addr show
```
```
ip route get
```
```
ip link set
```
```
ip neigh show
```

Question 6 of 50

6. Question

An administrator needs to add a default gateway with the IP address “192.168.1.1” to the system’s routing table. Which command should they use?

```
ip route add default via 192.168.1.1
```
```
ip addr add 192.168.1.1/32 dev eth0
```
```
ip link set dev eth0 up
```
```
ip route del 192.168.1.1
```

Question 7 of 50

7. Question

A system administrator needs to temporarily set the IP address of the eth0 interface to 192.168.0.10 with a subnet mask of 255.255.255.0. Which command should they use?

ifconfig eth0 192.168.0.10 netmask 255.255.255.0

```
ifconfig eth0 add 192.168.0.10/24
```
```
ifconfig eth0 up 192.168.0.10
```
```
ifconfig eth0 route add 192.168.0.10
```

Question 8 of 50

8. Question

After experiencing connectivity issues, a network administrator decides to view the configuration of all active network interfaces. Which command will display this information?

```
ifconfig
```
```
ifconfig -a
```
```
ifconfig eth0
```
```
ifconfig list
```

Question 9 of 50

9. Question

A system administrator needs to add a static route to the routing table so that traffic destined for the 192.168.5.0/24 network is directed through the gateway at 192.168.1.1. Which command should they use?

route add -net 192.168.5.0 netmask 255.255.255.0 gw 192.168.1.1
route add 192.168.5.0/24 via 192.168.1.1
route set 192.168.5.0/24 gw 192.168.1.1
route new 192.168.5.0/24 192.168.1.1

Question 10 of 50

10. Question

An administrator wants to view the kernel’s IP routing table. Which command would provide this information?

```
route show
```
```
route -n
```
```
route display
```
```
route get
```

Question 11 of 50

11. Question

An administrator notices suspicious network activity on a server and suspects ARP spoofing. To investigate the local ARP cache of the server, which command should the administrator use?

```
arp -n
```
```
arp view
```
```
arp display
```
```
arp resolve
```

Question 12 of 50

12. Question

A system administrator needs to manually add a static ARP entry associating IP address 192.168.1.10 with MAC address 00:11:22:33:44:55. Which command would accomplish this task?

```
arp -s 192.168.1.10 00:11:22:33:44:55
```
```
arp set 192.168.1.10 00:11:22:33:44:55
```

arp add 192.168.1.10 = 00:11:22:33:44:55

```
arp push 192.168.1.10 00:11:22:33:44:55
```

Question 13 of 50

13. Question

A system administrator needs to determine the frequency and channel on which a wireless network interface, wlan0, is currently operating. Which command should the administrator use?

```
iw wlan0 get frequency
```
```
iw wlan0 freq
```
```
iw wlan0 info
```
```
iw wlan0 show channel
```

Question 14 of 50

14. Question

An administrator wants to change the operating mode of a wireless interface, wlan0, to “Ad-Hoc” mode. Which of the following commands should be used?

```
iwconfig wlan0 mode Managed
```
```
iwconfig wlan0 mode Ad-Hoc
```
```
iwconfig wlan0 set mode=Ad-Hoc
```
```
iwconfig wlan0 configure mode Ad-Hoc
```

Question 15 of 50

15. Question

A network administrator needs to obtain detailed information about the available wireless networks in the vicinity, including their signal quality and encryption type. Which command should the administrator use?

```
iwlist wlan0 scan
```
```
iwlist wlan0 info
```
```
iwlist wlan0 networks
```
```
iwlist wlan0 status
```

Question 16 of 50

16. Question

An administrator needs to add a new static route for the 10.0.0.0/24 network via the gateway 192.168.1.1. Which command should the administrator use?

route add -net 10.0.0.0 netmask 255.255.255.0 gw 192.168.1.1

```
route add 10.0.0.0/24 via 192.168.1.1
```
```
route set 10.0.0.0/24 gw 192.168.1.1
```
```
route new 10.0.0.0/24 192.168.1.1
```

Question 17 of 50

17. Question

Alex, a system administrator, needs to configure advanced network settings, including routing and interface parameters, on a Linux server. Which utility should Alex use for this task?

```
ifconfig
```
```
ip
```
```
route
```
```
netstat
```

Question 18 of 50

18. Question

Emily, a network administrator, needs to analyze the status and performance of network devices on a Linux server. Which utility is commonly used for this purpose?

```
iftop
```
```
traceroute
```
```
iptraf-ng
```
```
ping
```

Question 19 of 50

19. Question

Emily is responsible for monitoring real-time network usage on her Linux server and wants a tool that provides a visual representation of current bandwidth usage. Which utility should she use?

```
iftop
```
```
netstat
```
```
tcpdump
```
```
nload
```

Question 20 of 50

20. Question

John is configuring advanced network settings on his Linux server and needs a tool that allows him to show or manipulate routing, devices, policy routing, and tunnels. Which utility should he use?

```
ip
```
```
ifconfig
```
```
route
```
```
netstat
```

Question 21 of 50

21. Question

Alex is managing network interfaces on a Linux server using the ifconfig command. He wants to display detailed information about all network interfaces, including those that are currently inactive. Which option should Alex use with the ifconfig command?

```
ifconfig -s
```
```
ifconfig -a
```
```
ifconfig -l
```
```
ifconfig -v
```

Question 22 of 50

22. Question

John needs to add a new static route to the routing table of his Linux system. Which command should he use to add a route for the network “192.168.2.0/24” via the gateway “192.168.1.1”?

route add -net 192.168.2.0 netmask 255.255.255.0 gw 192.168.1.1

route add 192.168.2.0/24 via 192.168.1.1

route add 192.168.2.0 netmask 255.255.255.0 gw 192.168.1.1

```
route create 192.168.2.0/24 192.168.1.1
```

Question 23 of 50

23. Question

Emily needs to manually add an entry to the ARP cache on her Linux system. Which command should she use to add a static ARP mapping for the IP address “192.168.1.100” with the corresponding MAC address “00:1a:2b:3c:4d:5e”?

```
arp -s 192.168.1.100 00:1a:2b:3c:4d:5e
```
```
arp add 192.168.1.100 00:1a:2b:3c:4d:5e
```

arp create 192.168.1.100 00:1a:2b:3c:4d:5e

```
arp set 192.168.1.100 00:1a:2b:3c:4d:5e
```

Question 24 of 50

24. Question

Lisa wants to view a summary of socket statistics on her Linux system, including the number of established connections, listening sockets, and more. Which ss command should she use?

```
ss -t
```
```
ss -l
```
```
ss -s
```
```
ss -a
```

Question 25 of 50

25. Question

John is troubleshooting network issues on his Linux server and wants to see the routing table. Which netstat command should he use?

```
netstat -a
```
```
netstat -r
```
```
netstat -t
```
```
netstat -l
```

Question 26 of 50

26. Question

Alex is investigating which processes have opened a specific file on his Linux server. Which command should he use?

```
lsof -f /path/to/file
```
```
lsof -p /path/to/file
```
```
lsof /path/to/file
```
```
lsof -i /path/to/file
```

Question 27 of 50

27. Question

You want to test the connectivity between your Linux server and a remote host using the IPv4 protocol. Which command should you use?

```
ping6 remote-host
```
```
ping -4 remote-host
```
```
ping -6 remote-host
```
```
ping remote-host
```

Question 28 of 50

28. Question

You need to check if a specific network port is open on a remote server. Which command should you use?

```
nc -zv remote-server 80
```
```
nc -l -p 80
```
```
nc -s 80 remote-server
```
```
nc -r -u remote-server 80
```

Question 29 of 50

29. Question

You need to capture and analyze network traffic on interface eth0. Which tcpdump command should you use?

```
tcpdump -i eth0
```
```
tcpdump -s 0 -i eth0
```
```
tcpdump -r eth0
```
```
tcpdump -n -i eth0
```

Question 30 of 50

30. Question

You are tasked with scanning a remote server for open ports and determining the services running on those ports. Which nmap command should you use?

```
nmap -p 80,443,22 -sP remote-server
```
```
nmap -sV -p 80,443,22 remote-server
```
```
nmap -O -p 80,443,22 remote-server
```
```
nmap -A -p 80,443,22 remote-server
```

Question 31 of 50

31. Question

You are troubleshooting network issues on a Linux system and suspect that access restrictions might be causing the problem. Where is the common location for access restriction files that control network services?

```
/etc/hosts.allow
```
```
 /etc/network.d/restrictions
```
```
/var/security/access_rules
```
```
/opt/firewall/configs
```

Question 32 of 50

32. Question

You are responsible for configuring and manipulating ethernet network interfaces on a Linux server. In which file would you typically define access restrictions for network services?

```
/etc/network/interfaces
```
```
/etc/hosts
```
```
/etc/inetd.conf
```
```
/etc/hosts.allow
```

Question 33 of 50

33. Question

You are tasked with troubleshooting routing issues on a Linux server. Which command would you use to display the routing table in a detailed and comprehensive format, including the type of service and source of the route?

```
ip route show
```
```
route -n
```
```
cat /proc/net/route
```
```
netstat -r
```

Question 34 of 50

34. Question

You are troubleshooting network issues on a Linux server and need to gather detailed information about its network configuration, including IP addresses, interface status, and routing tables. Which utility would you use for this purpose?

```
arpc
```
```
ifconfig
```
```
nslookup
```
```
ip addr show
```

Question 35 of 50

35. Question

You are tasked with troubleshooting network issues on a Linux server, and you need to gather information about the recognized and used hardware devices, including details about the network interfaces. Which command would you use for this purpose?

```
lspci
```
```
lsusb
```
```
dmidecode
```
```
ifconfig
```

Question 36 of 50

36. Question

You are troubleshooting network issues on a Linux server, and you need to inspect the initialization files related to network configuration in a SysV init system. Which file would you typically check for Ethernet interface configuration?

```
/etc/network/interfaces
```

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

```
/etc/networks.conf
```
```
/etc/systemd/network/10-eth0.network
```

Question 37 of 50

37. Question

As a system administrator, you are troubleshooting network issues on a Linux server, and you suspect that NetworkManager might be interfering with your manual network configurations. How can you temporarily disable NetworkManager to test your manual configurations?

```
service NetworkManager stop
```
```
systemctl disable NetworkManager
```
```
nmcli disable
```
```
netsh stop NetworkManager
```

Question 38 of 50

38. Question

You are investigating network issues on a Linux server and want to display information about the routing table, addresses, link states, and other network-related details. Which command would you use for this purpose?

```
ifconfig
```
```
route
```
```
arp
```
```
ip
```

Question 39 of 50

39. Question

You are troubleshooting network issues on a Linux server, and you want to display detailed information about network interfaces, including IP addresses, link states, and other relevant details. Which command would you use for this purpose?

```
ifconfig
```
```
ip route
```
```
arp
```
```
netstat
```

Question 40 of 50

40. Question

You are troubleshooting network connectivity issues on a Linux server, and you want to examine and modify the IP routing table. Which command allows you to view and manipulate the IP routing table on a Linux system?

```
route
```
```
traceroute
```
```
ping
```
```
ip route
```

Question 41 of 50

41. Question

You are tasked with diagnosing network connectivity issues on a Linux server. You need to identify all open network connections and their associated processes. Which netstat option would you use for this purpose?

```
netstat -t
```
```
netstat -a
```
```
netstat -p
```
```
netstat -s
```

Question 42 of 50

42. Question

You are troubleshooting network configuration on a Linux system, and you need to inspect the network configuration files. In which directory would you typically find network configuration files on a system that uses the systemd network management?

```
/etc/network/
```
```
/etc/sysconfig/network-scripts/
```
```
/etc/netplan/
```
```
/etc/networkd/
```

Question 43 of 50

43. Question

You are a system administrator troubleshooting network connectivity issues on a Linux server. You want to check the reachability of a remote server using IPv4. Which command would you use for this purpose?

```
ping6 example.com
```
```
traceroute example.com
```
```
ping example.com
```
```
netstat example.com
```

Question 44 of 50

44. Question

You are working on a system that predominantly uses IPv6 for networking. You need to investigate the route that packets take to reach a remote server using IPv6. Which command would you use for this purpose?

```
ping6 example.com
```
```
traceroute example.com
```
```
traceroute6 example.com
```
```
netstat example.com
```

Question 45 of 50

45. Question

You are experiencing intermittent connectivity issues on your Linux server and want to perform a continuous traceroute, monitoring the route taken by packets over time. Which command would be most suitable for this task?

```
ping example.com
```
```
traceroute example.com
```
```
mtr example.com
```
```
netstat example.com
```

Question 46 of 50

46. Question

You are troubleshooting a network issue on a Linux server, and you suspect that there might be a problem with the server’s hostname configuration. Which command allows you to view the current hostname of the system?

```
hostctl
```
```
dnsname
```
```
hostnamectl
```
```
named
```

Question 47 of 50

47. Question

You are facing network connectivity issues on your Linux server, and you want to examine system log files to troubleshoot the problem. Which log file contains general system messages and can provide information about network-related events?

```
/var/log/auth.log
```
```
/var/log/daemon.log
```
```
/var/log/syslog
```
```
/var/log/kern.log
```

Question 48 of 50

48. Question

You are experiencing network-related issues on your Linux server, and you want to check for kernel-level messages related to network devices. Which command provides information about the kernel ring buffer, including details about network devices?

```
kernlog
```
```
syslog
```
```
dmesg
```
```
kernelview
```

Question 49 of 50

49. Question

You are working on a Linux server, and users are reporting intermittent issues accessing websites. To investigate, you check the DNS configuration. Which command can be used to view the content of the /etc/resolv.conf file and verify the configured DNS servers?

```
dnsconfig
```
```
cat /etc/resolv.conf
```
```
resolvview
```
```
showdns
```

Question 50 of 50

50. Question

You are managing a Linux server that provides various network services. You want to control access to these services based on the client’s IP address. In which file would you specify access rules for network services in a typical Linux system?

```
/etc/access.conf
```
```
/etc/security/access_rules
```
```
/etc/hosts.allow
```
```
/etc/network/security
```