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1. Which of the following commands displays all active network interfaces on a Linux system?
   a. ifstat
   b. netstat
   c. ifconfig
   d. ping
   Answer: c. ifconfig
   geeksforgeeks+1
2. What does the “ifconfig eth0 up” command do?
   a. Deactivates the eth0 interface
   b. Updates the IP address of eth0
   c. Activates the eth0 interface
   d. Shows the MAC address of eth0
   Answer: c. Activates the eth0 interface
   phoenixnap+1
3. Which command is used to assign an IP address to an interface using ifconfig?
   a. ifconfig eth0 add 192.168.1.10
   b. ifconfig eth0 setip 192.168.1.10
   c. ifconfig eth0 192.168.1.10
   d. ifconfig 192.168.1.10 eth0
   Answer: c. ifconfig eth0 192.168.1.10
   geeksforgeeks+1
4. What does “ifconfig eth0 down” accomplish?
   a. Disables the eth0 network interface
   b. Updates interface statistics
   c. Deletes the eth0 interface
   d. Displays eth0 configuration
   Answer: a. Disables the eth0 network interface
   phoenixnap+1
5. Which option in ifconfig displays all network interfaces, even inactive ones?
   a. -v
   b. -a
   c. -all
   d. -s
   Answer: b. -a
   phoenixnap
6. How can the netmask be set for a network interface using ifconfig?
   a. ifconfig eth0 netmask 255.255.255.0
   b. ifconfig eth0 mask 255.255.255.0
   c. ifconfig eth0 subnet 255.255.255.0
   d. ifconfig set eth0 netmask 255.255.255.0
   Answer: a. ifconfig eth0 netmask 255.255.255.0
   geeksforgeeks+1
7. Which of the following can be configured via ifconfig?
   a. IP address
   b. Netmask
   c. Broadcast address
   d. All of these
   Answer: d. All of these
   geeksforgeeks+1
8. What information can the basic “ifconfig” command show?
   a. Network statistics only
   b. IP address, MAC address, MTU, etc.
   c. Only the interface name
   d. Interface speed
   Answer: b. IP address, MAC address, MTU, etc.
   includehelp+2
9. Which command sets the broadcast address of eth0 to 192.168.1.255?
   a. ifconfig eth0 broadcast 192.168.1.255
   b. ifconfig eth0 set-broadcast 192.168.1.255
   c. ifconfig broadcast 192.168.1.255 eth0
   d. ifconfig eth0 -broadcast 192.168.1.255
   Answer: a. ifconfig eth0 broadcast 192.168.1.255
   phoenixnap+1
10. How do you change the Maximum Transmission Unit (MTU) of an interface using ifconfig?
    a. ifconfig eth0 set mtu 1400
    b. ifconfig eth0 mtu 1400
    c. ifconfig mtu eth0 1400
    d. ifconfig eth0 –mtu 1400
    Answer: b. ifconfig eth0 mtu 1400
    includehelp+2
11. Which option disables promiscuous mode on an interface?
    a. promisc
    b. -promisc
    c. promisc off
    d. no-promisc
    Answer: b. -promisc
    phoenixnap
12. Which command is used to display a concise summary of all active interfaces?
    a. ifconfig -v
    b. ifconfig -short
    c. ifconfig -s
    d. ifconfig -summary
    Answer: c. ifconfig -s
    phoenixnap
13. The command “ifconfig eth0 hw ether 00:1a:2b:3c:4d:5e” is used for:
    a. Setting the interface speed
    b. Changing the MAC address
    c. Assigning a gateway
    d. Setting the netmask
    Answer: b. Changing the MAC address
    geeksforgeeks
14. What address family does ifconfig primarily use to configure IP interfaces?
    a. inet
    b. unix
    c. nsap
    d. link
    Answer: a. inet
    sites.ualberta
15. How is a network interface alias added in ifconfig?
    a. ifconfig eth0-1 192.168.1.20
    b. ifconfig eth0:0 192.168.1.20
    c. ifconfig eth0.alias 192.168.1.20
    d. ifconfig add eth0 192.168.1.20
    Answer: b. ifconfig eth0:0 192.168.1.20
    geeksforgeeks
16. Which command shows all currently configured interfaces, including those that are down?
    a. ifconfig -down
    b. ifconfig -a
    c. ifconfig show all
    d. ifconfig -list
    Answer: b. ifconfig -a
    phoenixnap
17. What must be true for ifconfig to modify network settings?
    a. No privileges required
    b. User must be root or use sudo
    c. Must be called from /root
    d. Only on Mondays
    Answer: b. User must be root or use sudo
    phoenixnap
18. Which command disables the ARP protocol on a specific interface?
    a. ifconfig eth0 -arp
    b. ifconfig eth0 noarp
    c. ifconfig eth0 arp off
    d. ifconfig -arp eth0
    Answer: a. ifconfig eth0 -arp
    phoenixnap
19. Which command enables all-multicast mode for an interface?
    a. ifconfig eth0 multi
    b. ifconfig eth0 allmulti
    c. ifconfig allmulti eth0
    d. ifconfig eth0 -multi
    Answer: b. ifconfig eth0 allmulti
    phoenixnap
20. Which field is NOT displayed by default via “ifconfig”?
    a. Broadcast address
    b. Link speed
    c. MTU
    d. MAC address
    Answer: b. Link speed
    geeksforgeeks+1
21. If “ifconfig” is run without arguments, what does it display?
    a. System processes
    b. DNS records
    c. Configuration of active interfaces
    d. Routing table
    Answer: c. Configuration of active interfaces
    geeksforgeeks+1
22. Which command brings down the alias “eth0:0”?
    a. ifconfig eth0:0 stop
    b. ifconfig eth0:0 disable
    c. ifconfig eth0:0 down
    d. ifconfig down eth0:0
    Answer: c. ifconfig eth0:0 down
    geeksforgeeks
23. What does “ifconfig eth0” alone (with no arguments) do?
    a. Brings eth0 up
    b. Shows eth0 interface configuration
    c. Assigns a random IP
    d. Disables eth0
    Answer: b. Shows eth0 interface configuration
    geeksforgeeks+1
24. How do you enable the ARP protocol on eth0?
    a. ifconfig eth0 arp
    b. ifconfig arp eth0
    c. ifconfig eth0 +arp
    d. ifconfig eth0 enable arp
    Answer: a. ifconfig eth0 arp
    phoenixnap
25. What will “ifconfig lo” output?
    a. Configuration of Ethernet0 interface
    b. Loopback interface configuration
    c. List of all interfaces
    d. No output
    Answer: b. Loopback interface configuration
    geeksforgeeks+1
26. What does the MTU field in ifconfig represent?
    a. Maximum Transfer Upload
    b. Maximum Trusted Unit
    c. Maximum Transmission Unit
    d. Main Transmission Upstream
    Answer: c. Maximum Transmission Unit
    includehelp+1
27. The flag IFF_MULTICAST in ifconfig output means the interface:
    a. Is using point-to-point
    b. Supports multicast
    c. Is in promiscuous mode
    d. Has hardware offload
    Answer: b. Supports multicast
    sites.ualberta
28. How does ifconfig help in troubleshooting?
    a. By providing firewall logs
    b. By showing interface status and IP
    c. By viewing routing tables
    d. By displaying system errors
    Answer: b. By showing interface status and IP
    geeksforgeeks+1
29. Which protocol’s address can ifconfig assign on interface setup?
    a. HTTP
    b. ICMP
    c. IP
    d. SSL
    Answer: c. IP
    sites.ualberta
30. When configuring a new interface, what must be specified with ifconfig apart from interface name?
    a. A valid IP address
    b. A password
    c. A routing protocol
    d. DNS server
    Answer: a. A valid IP address
    sites.ualberta+2
31. If no output is shown for an interface using ifconfig, what is likely true?
    a. The interface is down
    b. The interface has an IP
    c. The interface is up
    d. The interface is not configured
    Answer: d. The interface is not configured
    sites.ualberta+1
32. What effect does “ifconfig eth0 promisc” have?
    a. Enables ARP
    b. Enables promiscuous mode
    c. Disables interface
    d. Enables multicast
    Answer: b. Enables promiscuous mode
    phoenixnap
33. To change both IP address and netmask for eth0, the correct command is:
    a. ifconfig eth0 192.168.1.10 netmask 255.255.255.0
    b. ifconfig eth0 set 192.168.1.10 mask 255.255.255.0
    c. ifconfig eth0 assign 192.168.1.10 netmask 255.255.255.0
    d. ifconfig 192.168.1.10 255.255.255.0 eth0
    Answer: a. ifconfig eth0 192.168.1.10 netmask 255.255.255.0
    geeksforgeeks+1
34. Which command prints only the configuration for the specified interface eth1?
    a. ifconfig eth1
    b. ifconfig show eth1
    c. ifconfig -i eth1
    d. ifconfig -e eth1
    Answer: a. ifconfig eth1
    phoenixnap+1
35. Which mode receives all packets for analysis in network forensics?q
    a. Multicast mode
    b. Broadcast mode
    c. Promiscuous mode
    d. Simplex mode
    Answer: c. Promiscuous mode
    phoenixnap
36. Why might a modern Linux system not have ifconfig installed by default?
    a. ifconfig is obsolete; replaced by ip command
    b. ifconfig is not open source
    c. ifconfig is only for Windows
    d. ifconfig is slow
    Answer: a. ifconfig is obsolete; replaced by ip command
    blackdown+1
37. Which of these fields appears in ifconfig output?
    a. Interface name
    b. IP address
    c. MAC address
    d. All of these
    Answer: d. All of these
    blackdown+2
38. Which command removes an alias from the eth0 interface?
    a. ifconfig eth0:0 remove
    b. ifconfig eth0:0 down
    c. ifconfig eth0:0 del
    d. ifconfig eth0:0 alias remove
    Answer: b. ifconfig eth0:0 down
    geeksforgeeks
39. Setting the ARP protocol on eth0 with ifconfig is done using:
    a. ifconfig eth0 arp
    b. ifconfig arp eth0
    c. ifconfig eth0 enarp
    d. ifconfig eth0 +arp
    Answer: a. ifconfig eth0 arp
    phoenixnap
40. To set the netmask and broadcast address for eth0 at once, the proper command is:
    a. ifconfig eth0 netmask 255.255.255.0 broadcast 192.168.1.255
    b. ifconfig eth0 255.255.255.0 192.168.1.255
    c. ifconfig set eth0 netmask 255.255.255.0 broadcast 192.168.1.255
    d. ifconfig eth0 mask 255.255.255.0 bcast 192.168.1.255
    Answer: a. ifconfig eth0 netmask 255.255.255.0 broadcast 192.168.1.255
    geeksforgeeks+1
41. The “inet addr” field in ifconfig output displays:
    a. IPv4 address
    b. MAC address
    c. DNS server
    d. Interface name
    Answer: a. IPv4 address
    blackdown+1
42. What does the “lo” interface represent in “ifconfig” output?
    a. Ethernet0
    b. Loopback
    c. Wi-Fi
    d. Virtual LAN
    Answer: b. Loopback
    blackdown+1
43. Which value can be changed by running “ifconfig eth0 mtu 1400”?
    a. Interface speed
    b. MTU
    c. Subnet mask
    d. Interface index
    Answer: b. MTU
    includehelp+2
44. When would “ifconfig -v” be useful?
    a. To show minimal information
    b. To display more detailed config for interfaces
    c. It lists interfaces briefly
    d. To activate an interface
    Answer: b. To display more detailed config for interfaces
    phoenixnap
45. To see the summary of interfaces with minimal details, use:
    a. ifconfig -s
    b. ifconfig -v
    c. ifconfig -summary
    d. ifconfig -min
    Answer: a. ifconfig -s
    phoenixnap
46. Which protocol does ifconfig NOT handle directly?
    a. IP
    b. ARP
    c. TCP
    d. Ethernet
    Answer: c. TCP
    sites.ualberta+1
47. Assigning a new MAC address via ifconfig can be done with which keyword?
    a. mac
    b. hardware
    c. hw ether
    d. addr
    Answer: c. hw ether
    geeksforgeeks
48. How can ifconfig facilitate the creation of a virtual interface?
    a. By creating eth0:1 with ifconfig eth0:1 192.168.0.5
    b. By running ifconfig virtual eth0
    c. By using ifconfig eth0 virtual 192.168.0.5
    d. By ifconfig create virtual eth0
    Answer: a. By creating eth0:1 with ifconfig eth0:1 192.168.0.5
    geeksforgeeks
49. What issue might ifconfig -a help diagnose?
    a. Unlisted but active interfaces
    b. Duplicate interfaces only
    c. Overloaded interfaces only
    d. Interface speed mismatches
    Answer: a. Unlisted but active interfaces
    phoenixnap
50. Why is ifconfig still taught, despite newer tools like “ip”?
    a. ifconfig is cross-platform
    b. Legacy systems still use it, and it is still found in many tutorials and documentation
    c. ifconfig replaces all other tools
    d. ip is deprecated
    Answer: b. Legacy systems still use it, and it is still found in many tutorials and documentation

1. https://www.geeksforgeeks.org/linux-unix/ifconfig-command-in-linux-with-examples/
2. https://phoenixnap.com/kb/linux-ifconfig
3. https://www.includehelp.com/linux/network-commands-aptitude-questions-and-answers.aspx
4. https://sites.ualberta.ca/dept/chemeng/AIX-43/share/man/info/C/a_doc_lib/cmds/aixcmds3/ifconfig.htm
5. https://www.blackdown.org/linux-network-commands/
6. https://www.redhat.com/en/blog/ifconfig-vs-ip
7. https://www.sanfoundry.com/computer-networks-mcqs-network-utilities/
8. https://www.placementpreparation.io/mcq/computer-network/
9. https://www.sanfoundry.com/computer-network-questions-answers/
10. https://www.uninets.com/blog/computer-networks-mcq
11. https://scholarexpress.com/computer-networks-multiple-choice-questions/
12. https://www.ibm.com/docs/ssw_aix_72/i_commands/ifconfig.html
13. https://www.gdcramban.in/MCQ/networkmcq.pdf
14. https://manage.accuwebhosting.com/knowledgebase/4809/Explain-ifconfig-Command-in-Linux.html
15. https://www.interviewbit.com/computer-network-mcq/
16. https://www.tecmint.com/ifconfig-command-examples/
17. https://pubs.lenovo.com/imm2/dw1lm_r_ifconfigcommand
18. https://www.youtube.com/watch?v=Y9paMPlq7NM
19. https://docs.oracle.com/cd/E19683-01/817-0573/solimpconcepts-41/index.html
20. https://reck.ac.in/wp-content/uploads/2023/04/DCN_MCQ-Ashwini-.pdf