WEP-Open : AP-STA between 2 Linux laptops

== Scanning == STA -> AP: **Probe Request** AP -> STA: **Probe Response** == Authentication == STA -> AP: **Authentication Request** AP --> STA: ACK AP -> STA: **Authentication Response** STA --> AP: ACK == Association == STA -> AP: **Association Request** AP --> STA: ACK AP -> STA: **Association Response** STA --> AP: ACK == DHCP == STA -> AP: **DHCP Discover** AP --> STA: ACK AP -> STA: **DHCP Offer** STA --> AP: ACK STA -> AP: **DHCP Request** AP --> STA: ACK AP -> STA: **DHCP Acknowledgement** STA --> AP: ACK == PING AP from STA == STA -> AP: **ARP Request** AP --> STA: ACK AP -> STA: **ARP Reply** STA --> AP: ACK STA -> AP: **ICMP Echo Request** AP --> STA: ACK AP -> STA: **ICMP Echo Reply** STA --> AP: ACK STA -> AP: **ICMP Echo Request** AP --> STA: ACK AP -> STA: **ICMP Echo Reply** STA --> AP: ACK STA -> AP: **ICMP Echo Request** AP --> STA: ACK AP -> STA: **ICMP Echo Reply** STA --> AP: ACK == PING STA from AP == AP -> STA: **ARP Request** STA --> AP: ACK STA -> AP: **ARP Reply** AP --> STA: ACK AP -> STA: **ICMP Echo Request** STA --> AP: ACK STA -> AP: **ICMP Echo Reply** AP --> STA: ACK AP -> STA: **ICMP Echo Request** STA --> AP: ACK STA -> AP: **ICMP Echo Reply** AP --> STA: ACK AP -> STA: **ICMP Echo Request** STA --> AP: ACK STA -> AP: **ICMP Echo Reply** AP --> STA: ACK

Step 1: STA : Remove old packages

Step 1: AP : Remove old packages

 
$ cd $HOME

$ rm -rf hostap* wpa_supp*

$ cd $HOME

$ rm -rf hostap* wpa_supp*

Step 2: STA : Download wpa_supplicant

Step 2: AP : Download hostapd

Note

Make sure internet is available in laptop to download supplicant package

Note

Make sure internet is available in laptop to download hostapd package

 
$ sudo wget https://w1.fi/releases/wpa_supplicant-2.9.tar.gz

$ sudo wget http://w1.fi/releases/hostapd-2.9.tar.gz

Step 3: STA : Install libraries

Step 3: AP : Install libraries

Note

Make sure internet is available in laptop to download libraries

Note

Make sure internet is available in laptop to download libraries

 
$ sudo apt install libnl-genl-3-dev libnl-3-dev libdbus-glib-1-dev

$ sudo apt install libnl-genl-3-dev libnl-3-dev libdbus-glib-1-dev

Step 4: STA : Stop ongoing wireless activities

Step 4: AP : Stop ongoing wireless activities

Warning

Internet is cut-off after this !

Warning

Internet is cut-off after this !

 
$ sudo killall wpa_supplicant

$ sudo killall wpa_cli

$ sudo killall hostapd

$ sudo killall hostapd_cli

$ sudo /etc/init.d/network-manager stop
Stopping network-manager (via systemctl): network-manager.service.

$ sudo rfkill list all
0: hci0: Bluetooth
	Soft blocked: no
	Hard blocked: no
1: dell-wifi: Wireless LAN
	Soft blocked: no
	Hard blocked: no
2: dell-bluetooth: Bluetooth
	Soft blocked: no
	Hard blocked: no
3: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no
4: phy1: Wireless LAN
	Soft blocked: no
	Hard blocked: no
5: phy2: Wireless LAN
	Soft blocked: no
	Hard blocked: no

$ sudo rfkill unblock all
$ sudo ifconfig wlan1 up

$ sudo killall wpa_supplicant

$ sudo killall wpa_cli

$ sudo killall hostapd

$ sudo killall hostapd_cli

$ sudo killall dhclient

$ sudo /etc/init.d/network-manager stop
Stopping network-manager (via systemctl): network-manager.service.

$ sudo rfkill list all
0: hci0: Bluetooth
	Soft blocked: no
	Hard blocked: no
1: dell-wifi: Wireless LAN
	Soft blocked: no
	Hard blocked: no
2: dell-bluetooth: Bluetooth
	Soft blocked: no
	Hard blocked: no
3: phy0: Wireless LAN
	Soft blocked: no
	Hard blocked: no
4: phy1: Wireless LAN
	Soft blocked: no
	Hard blocked: no
5: phy2: Wireless LAN
	Soft blocked: no
	Hard blocked: no

$ sudo rfkill unblock all
$ sudo ifconfig wlan0 up

Step 5: STA : Wireless interface status before connection

Step 5: AP : Wireless interface status before connection

Note

wlan1 is the name of wireless interface on this laptop

Note

wlan0 is the name of wireless interface on this laptop

 
$ sudo iwconfig wlan1
wlan1     IEEE 802.11  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=20 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:on

$ sudo iwconfig wlan0
wlan0     IEEE 802.11  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=20 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:on

Step 6: STA : ifconfig interface status before connection

Step 6: AP : ifconfig interface status before connection

 
$ sudo ifconfig wlan1
wlan1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 02:00:00:00:01:00  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

$ sudo ifconfig wlan0
wlan0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 02:00:00:00:00:00  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Step 7: STA : Extract wpa_supplicant

Step 7: AP : Extract hostapd

Note

tar -xvf command extracts zipped supplicant package

Note

tar -xvf command extracts zipped hostapd package

 
$ sudo tar -xvf wpa_supplicant-2.9.tar.gz

$ sudo tar -xzvf hostapd-2.9.tar.gz

Step 8: STA : Compile wpa_supplicant

Step 8: AP : Compile hostapd

Note

.config file is required for make to start compilation of supplicant

Note

.config file is required for make to start compilation of hostapd

 
$ cd wpa_supplicant-2.9/wpa_supplicant

$ cp defconfig .config

$ make

$ cd hostapd-2.9/hostapd

$ cp defconfig .config

$ make

Step 9: STA : Create run_supplicant.conf

Step 9: AP : Create run_hostapd.conf

Note

ssid in ./run_supplicant.conf should match ssid in ./run_hostapd.conf

Note

ssid in ./run_hostapd.conf should be used by clients while connecting to AP

 
$ sudo vim ./run_supplicant.conf

ctrl_interface=/run/wpa_supplicant
update_config=1

# A key may be a quoted string or unquoted hexadecimal digits.
# The key length should be 5, 13, or 16 characters, or 10, 26, or 32
# digits, depending on whether 40-bit (64-bit), 104-bit (128-bit), or
# 128-bit (152-bit) WEP is used.
# Only the default key must be supplied; the others are optional.
# default: not set

network={
	ssid="test_wep_open"
	key_mgmt=NONE
	wep_key0=123456789a
	wep_key1="vwxyz"
	wep_key2=0102030405060708090a0b0c0d
	wep_key3=".2.4.6.8.0.23"
	wep_tx_keyidx=0
	priority=5
	auth_alg=OPEN
}

$ sudo vim ./run_hostapd.conf

ctrl_interface=/run/hostapd
interface=wlan0
driver=nl80211
ssid=test_wep_open
hw_mode=g
channel=1
macaddr_acl=0
auth_algs=1
ignore_broadcast_ssid=0
# A key may be a quoted string or unquoted hexadecimal digits.
# The key length should be 5, 13, or 16 characters, or 10, 26, or 32
# digits, depending on whether 40-bit (64-bit), 104-bit (128-bit), or
# 128-bit (152-bit) WEP is used.
# Only the default key must be supplied; the others are optional.
# default: not set
wep_key0=123456789a
wep_key1="vwxyz"
wep_key2=0102030405060708090a0b0c0d
wep_key3=".2.4.6.8.0.23"
wep_default_key=0

MONITOR : Let us start Sniffer to capture all packets between STA and AP

 
$ sudo iw dev wlan1 interface add moni0 type monitor

$ sudo iw dev moni0 set type monitor

$ sudo ifconfig moni0 up

$ sudo iw dev moni0 set channel 6

$ sudo iwconfig moni0
wlan3     IEEE 802.11  Mode:Monitor  Frequency:2.437 GHz  Tx-Power=20 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:on

$ sudo iw dev 
phy#4
	Interface moni0
		ifindex 7
		wdev 0x400000001
		addr 02:00:00:00:03:00
		type monitor
		channel 6 (2437 MHz), width: 20 MHz (no HT), center1: 2437 MHz
		txpower 20.00 dBm

$ sudo apt-get install wireshark


$ sudo wireshark

Step 10: STA : Run wpa_supplicant

Step 10: AP : Run hostapd

Note

CTRL-EVENT-CONNECTED indicates successful connection to AP

Note

AP-STA-CONNECTED indicates successful connection of STA

 
$ sudo ./wpa_supplicant -Dnl80211 -i wlan1 -c ./run_supplicant.conf

Successfully initialized wpa_supplicant
wlan1: SME: Trying to authenticate with 02:00:00:00:00:00 (SSID='test_wep_open' freq=2412 MHz)
wlan1: Trying to associate with 02:00:00:00:00:00 (SSID='test_wep_open' freq=2412 MHz)
wlan1: Associated with 02:00:00:00:00:00
wlan1: CTRL-EVENT-CONNECTED - Connection to 02:00:00:00:00:00 completed [id=0 id_str=]

$ sudo ./hostapd ./run_hostapd.conf

Configuration file: /etc/hostapd/hostapd.conf
Using interface wlan0 with hwaddr 02:00:00:00:00:00 and ssid "test_wep_open"
wlan0: interface state UNINITIALIZED->ENABLED
wlan0: AP-ENABLED

Step 11: STA : Check ps status and confirm wpa_supplicant process is running

Step 11: AP : Check ps status and confirm hostapd process is running

 
$ ps -N | grep -i wpa
  36164 pts/2    00:00:00 wpa_supplicant

$ ps -N | grep -i hostapd
  36261 pts/3    00:00:00 hostapd

Step 12: STA : Check connection status using wpa_cli

Step 12: AP : Check connection status using hostapd_cli

Note

wpa_state=COMPLETED indicates successful connection. Check output of status

Note

aid=1 is assigned to connected station. Check output of all_sta

 
$ sudo ./wpa_cli -i wlan1
> status
bssid=02:00:00:00:00:00
freq=2412
ssid=test_wep_open
id=0
mode=station
pairwise_cipher=WEP-40
group_cipher=WEP-40
key_mgmt=NONE
wpa_state=COMPLETED
address=02:00:00:00:01:00
uuid=572cf82f-c957-5653-9b16-b5cfb298abf1

$ sudo ./hostapd_cli -i wlan0
hostapd_cli v2.9
Copyright (c) 2004-2019, Jouni Malinen <j@w1.fi> and contributors

This software may be distributed under the terms of the BSD license.
See README for more details.

Interactive mode

Step 13: STA : Wireless interface status after connection

Step 13: AP : Wireless interface status after connection

Note

ESSID field in iwconfig should show ssid of AccessPoint

Note

Mode field in iwconfig should show master

 
$ sudo iwconfig 
wlan1     IEEE 802.11  ESSID:"test_wep_open"  
          Mode:Managed  Frequency:2.412 GHz  Access Point: 02:00:00:00:00:00   
          Bit Rate:54 Mb/s   Tx-Power=20 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:on
          Link Quality=70/70  Signal level=-30 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

$ sudo iw dev
phy#2
	Interface wlan1
		ifindex 6
		wdev 0x200000001
		addr 02:00:00:00:01:00
		ssid test_wep_open
		type managed
		channel 1 (2412 MHz), width: 20 MHz (no HT), center1: 2412 MHz
		txpower 20.00 dBm

$ sudo iwconfig 
wlan0     IEEE 802.11  Mode:Master  Tx-Power=20 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:on

$ sudo iw dev
phy#1
	Interface wlan0
		ifindex 5
		wdev 0x100000001
		addr 02:00:00:00:00:00
		ssid test_wep_open
		type AP
		channel 1 (2412 MHz), width: 20 MHz (no HT), center1: 2412 MHz

Step 14: STA : Assign Static IP address

Step 14: AP : Assign Static IP address

Note

Station and AP should be in same IP subnet. Assign 192.168.3.10 to Station

Note

Station and AP should be in same IP subnet. Assign 192.168.3.1 to AP

Attention

Use static IP assignment if DHCP server is not supported by AP

Attention

Use static IP assignment if DHCP server is not supported by AP

 
$ sudo ifconfig wlan1 192.168.3.10 up

$ sudo ifconfig wlan1
wlan1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.3.10  netmask 255.255.255.0  broadcast 192.168.3.255
        ether 02:00:00:00:01:00  txqueuelen 1000  (Ethernet)
        RX packets 73  bytes 13119 (13.1 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 65  bytes 13111 (13.1 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

$ sudo ifconfig wlan0 192.168.3.1 up

$ sudo ifconfig wlan0
wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.3.1  netmask 255.255.255.0  broadcast 192.168.3.255
        ether 02:00:00:00:00:00  txqueuelen 1000  (Ethernet)
        RX packets 61  bytes 11085 (11.0 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 130  bytes 25688 (25.6 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Step 15: STA : Assign DHCP IP address

Step 15: AP : Assign DHCP IP address

Attention

This initiates DORA. Make sure DHCP server is running in AP !

Attention

isc-dhcp-server needs to be installed to setup DHCP server

Note

dhclient is DHCP client

Note

See below ! Add configuration in /etc/dhcp/dhcpd.conf

Note

dhclient -r releases existing IP

Note

See below ! Add configuration in /etc/network/interfaces

Note

dhclient -i wlan1 gets IP address from DHCP server

Note

See below ! Add configuration in /etc/default/isc-dhcp-server

 
# Release any existing IP address

$ sudo dhclient -r

$ sudo ifconfig wlan1 0.0.0.0 up

# Run DHCP client on wlan1. This initiates DORA

$ sudo dhclient -i wlan1

# Check if wlan1 got IP address

$ sudo ifconfig wlan1


Setup DHCP server : https://help.ubuntu.com/community/isc-dhcp-server

$ sudo dpkg --configure -a

$ sudo apt-get install isc-dhcp-server

$ sudo vim /etc/dhcp/dhcpd.conf

# (add your comments here) 
default-lease-time 600;
max-lease-time 7200;
option subnet-mask 255.255.255.0;
option broadcast-address 192.168.1.255;
option routers 192.168.1.254;
option domain-name-servers 192.168.1.1, 192.168.1.2;
option domain-name "mydomain.example";

subnet 192.168.1.0 netmask 255.255.255.0 {
range 192.168.1.10 192.168.1.100;
range 192.168.1.150 192.168.1.200;
}


$ sudo vim /etc/network/interfaces

auto wlan0
  iface wlan0 inet static
    address 192.168.3.1
    netmask 255.255.255.0
    up     /sbin/iwconfig wlan0 mode TTTTTT && /sbin/iwconfig wlan0 enc
restricted && /sbin/iwconfig wlan0 key [Y] XXXXXXXX && /sbin/iwconfig
wlan0 essid test_wpa2

$ sudo vim /etc/default/isc-dhcp-server

INTERFACESv4="wlan0"
INTERFACESv6=""

$ sudo ifconfig wlan0 192.168.3.1 up

$ sudo service isc-dhcp-server stop
$ sudo service isc-dhcp-server start
$ sudo service isc-dhcp-server status
● isc-dhcp-server.service - ISC DHCP IPv4 server
     Loaded: loaded (/lib/systemd/system/isc-dhcp-server.service;
             enabled; vendor preset: enabled)
     Active: active (running) since Sun 2022-01-09 12:24:33 IST; 5s ago
       Docs: man:dhcpd(8)
   Main PID: 50874 (dhcpd)
      Tasks: 4 (limit: 9330)
     Memory: 5.0M
     CGroup: /system.slice/isc-dhcp-server.service
             └─50874 dhcpd -user dhcpd -group dhcpd -f -4 -pf
             /run/dhcp-server/dhcpd.pid -cf /etc/dhcp/dhcpd.conf wlan0

Jan 09 12:24:33 test dhcpd[50874]: PID file: /run/dhcp-server/dhcpd.pid
Jan 09 12:24:33 test dhcpd[50874]: Wrote 0 leases to leases file.
Jan 09 12:24:33 test sh[50874]: Wrote 0 leases to leases file.
Jan 09 12:24:33 test dhcpd[50874]: Listening on LPF/wlan0/02:00:00:00:00:00/192.168.3.0/24
Jan 09 12:24:33 test sh[50874]: Listening on LPF/wlan0/02:00:00:00:00:00/192.168.3.0/24
Jan 09 12:24:33 test sh[50874]: Sending on   LPF/wlan0/02:00:00:00:00:00/192.168.3.0/24
Jan 09 12:24:33 test sh[50874]: Sending on   Socket/fallback/fallback-net
Jan 09 12:24:33 test dhcpd[50874]: Sending on   LPF/wlan0/02:00:00:00:00:00/192.168.3.0/24
Jan 09 12:24:33 test dhcpd[50874]: Sending on   Socket/fallback/fallback-net
Jan 09 12:24:33 test dhcpd[50874]: Server starting service.

Step 16: STA : Ping AP

Step 16: AP : Ping STA

Note

192.168.3.1 is IP address of Access Point

Note

192.168.3.10 is IP address of Station

 
$ sudo ping 192.168.3.1
PING 192.168.3.1 (192.168.3.1) 56(84) bytes of data.
64 bytes from 192.168.3.1: icmp_seq=1 ttl=64 time=0.121 ms
64 bytes from 192.168.3.1: icmp_seq=2 ttl=64 time=0.091 ms
64 bytes from 192.168.3.1: icmp_seq=3 ttl=64 time=0.090 ms
64 bytes from 192.168.3.1: icmp_seq=4 ttl=64 time=0.097 ms
64 bytes from 192.168.3.1: icmp_seq=5 ttl=64 time=0.243 ms

$ sudo ping 192.168.3.10
PING 192.168.3.10 (192.168.3.10) 56(84) bytes of data.
64 bytes from 192.168.3.10: icmp_seq=1 ttl=64 time=0.092 ms
64 bytes from 192.168.3.10: icmp_seq=2 ttl=64 time=0.036 ms
64 bytes from 192.168.3.10: icmp_seq=3 ttl=64 time=0.094 ms
64 bytes from 192.168.3.10: icmp_seq=4 ttl=64 time=0.105 ms
64 bytes from 192.168.3.10: icmp_seq=5 ttl=64 time=0.094 ms

Step 17: STA : Run TCP server for TCP DL test

Step 17: AP : Run TCP Client for TCP DL test

 
$ sudo iperf -s -i 1

$ sudo iperf -c 192.168.3.10 -i 1 -t 30

Step 18: STA : Run TCP client for TCP UL test

Step 18: AP : Run TCP Server for TCP UL test

 
$ sudo iperf -c 192.168.3.1 -i 1 -t 30

$ sudo iperf -s -i 1

Step 19: STA : Run UDP server for UDP DL test

Step 19: AP : Run UDP Client for UDP DL test

 
$ sudo iperf -s -u -i 1 

$ sudo iperf -c 192.168.3.10 -u -b 1000M -i 1 -t 30

Step 20: STA : Run UDP client for UDP UL test

Step 20: AP : Run UDP Server for UDP UL test

 
$ sudo iperf -c 192.168.3.1 -u -b 1000M -i 1 -t 30

$ sudo iperf -s -u -i 1
## In 802.11, WEP-Open security method, there are ? - [x] Two authentication packets > This is the correct answer. - [ ] Four authentication packets > This is wrong ! - [ ] Six authentication packets > This is wrong. - [ ] Eight authentication packets > This is wrong. ## In 802.11 WEP - [x] RC4 is used for confidentiality > This is the correct answer. - [ ] CCMP is used for confidentiality > This is wrong ! - [ ] RC5 is used for confidentiality > This is wrong. - [ ] RC6 is used for confidentiality > This is wrong. ## In 802.11 WEP 128 bit - [x] User key is 13 ASCII characters > This is the correct answer. - [ ] User key is 26 ASCII characters > This is wrong ! - [ ] User key is 52 ASCII characters > This is wrong. - [ ] User key is 104 ASCII characters > This is wrong. ## In 802.11 WEP 64 bit - [x] User key is 5 ASCII characters > This is the correct answer. - [ ] User key is 10 ASCII characters > This is wrong ! - [ ] User key is 20 ASCII characters > This is wrong. - [ ] User key is 30 ASCII characters > This is wrong. ## In 802.11 WEP 128 bit - [x] User key is 26 hexadecimal digits > This is the correct answer. - [ ] User key is 52 hexadecimal digits > This is wrong ! - [ ] User key is 104 hexadecimal digits > This is wrong. - [ ] User key is 128 hexadecimal digits > This is wrong. ## In 802.11 WEP 64 bit - [x] User key is 10 hexadecimal digits > This is the correct answer. - [ ] User key is 20 hexadecimal digits > This is wrong ! - [ ] User key is 30 hexadecimal digits > This is wrong. - [ ] User key is 40 hexadecimal digits > This is wrong. ## In 802.11 WEP 128 bit - [x] 104 bits user key + 24 bits IV > This is the correct answer. - [ ] 100 bits user key + 28 bits IV > This is wrong ! - [ ] 50 bits user key + 78 bits IV > This is wrong. - [ ] 10 bits user key + 118 bits IV > This is wrong. ## In 802.11 WEP 64 bit - [x] 40 bits user key + 24 bits IV > This is the correct answer. - [ ] 30 bits user key + 34 bits IV > This is wrong ! - [ ] 10 bits user key + 54 bits IV > This is wrong. - [ ] 20 bits user key + 44 bits IV > This is wrong. ## In 802.11, What are the valid WEP modes - [x] 64 bit WEP, 128 bit WEP, 152 bit WEP, 256 bit WEP > This is the correct answer. - [x] 66 bit WEP, 128 bit WEP, 152 bit WEP, 258 bit WEP > This is wrong ! - [x] 64 bit WEP, 129 bit WEP, 153 bit WEP, 256 bit WEP > This is wrong. - [x] 64 bit WEP, 128 bit WEP, 157 bit WEP, 256 bit WEP > This is wrong. ## In 802.11, WEP-Shared security method, there are ? - [ ] Two authentication packets > This is wrong ! - [x] Four authentication packets > This is the correct answer. - [ ] Six authentication packets > This is wrong. - [ ] Eight authentication packets > This is wrong. ## WEP stands for ? - [x] Wired Equivalent Privacy > This is the correct answer. - [ ] Wireless Equivalent Privacy > This is wrong ! - [ ] Wired Encryption Privacy > This is wrong. - [ ] Wireless Encryption Privacy > This is wrong. ## wget command is used to ? - [x] Download a package from Internet > This is the correct answer. - [ ] Delete a directory > This is wrong ! rm or rmdir is used to Delete a directory. - [ ] Create a socket file > This is wrong. - [ ] Compile a program > This is wrong. A compiler is used to compile a program ## killall command is used to ? - [x] Terminate all instances of a process > This is the correct answer. - [ ] Create process > This is wrong ! - [ ] Restart network manager > This is wrong ! /etc/init.d/network-manager restart is used to restart a network manager - [ ] Create an ordinary file > This is wrong ! ## iwconfig command without arguements ? - [x] Lists all available wireless interfaces > This is the correct answer. - [ ] Lists all available ethernet interfaces > This is wrong ! - [ ] Lists all available bluetooth interfaces > This is wrong ! - [ ] None of the above > This is wrong ! ## tar -xvf command ? - [x] Decompress a compressed .tar.gz file > This is the correct answer. - [ ] Decompress a compressed .zip file > This is wrong ! - [ ] Compress a Decompressed .tar.gz file > This is wrong ! tar -cvf is used to create a compressed file - [ ] Compress a Decompressed .zip file > This is wrong ! ## wpa supplicant indicates ? - [x] 802.11 station operation > This is the correct answer. - [ ] 802.11 AP operation > This is wrong ! - [ ] Monitor mode operation > This is wrong ! - [ ] None of the above > This is wrong ! ## hostapd indicates ? - [ ] 802.11 station operation > This is wrong ! - [x] 802.11 AP operation > This is the correct answer. - [ ] Monitor mode operation > This is wrong ! - [ ] None of the above > This is wrong ! ## make command is used ? - [ ] Download a package from Internet > This is wrong. wget or apt-get is used for downloading a package - [ ] Delete a directory > This is wrong ! rm or rmdir is used to Delete a directory. - [ ] Create a socket file > This is wrong ! - [x] Compile a program > This is the correct answer. ## dhclient command is used ? - [x] on STA side to initiate DORA and get IP address from DHCP server > This is the correct answer. - [ ] on AP side to assign a static IP > This is wrong ! - [ ] on STA side to assign a static IP > This is wrong ! - [ ] on AP side to assign a DHCP IP > This is wrong ! ## TCP UL means ? - [x] iperf server on AP side, iperf client on STA side > This is the correct answer. - [ ] iperf server on STA side, iperf client on AP side > This is wrong ! - [ ] iperf client on STA side, iperf client on AP side > This is wrong ! - [ ] iperf server on STA side, iperf server on AP side > This is wrong ! ## UDP UL means ? - [x] iperf server on AP side, iperf client on STA side > This is the correct answer. - [ ] iperf server on STA side, iperf client on AP side > This is wrong ! - [ ] iperf client on STA side, iperf client on AP side > This is wrong ! - [ ] iperf server on STA side, iperf server on AP side > This is wrong ! ## TCP DL means ? - [ ] iperf server on AP side, iperf client on STA side > This is wrong ! - [x] iperf server on STA side, iperf client on AP side > This is the correct answer. - [ ] iperf client on STA side, iperf client on AP side > This is wrong ! - [ ] iperf server on STA side, iperf server on AP side > This is wrong ! ## UDP DL means ? - [ ] iperf server on AP side, iperf client on STA side > This is wrong ! - [x] iperf server on STA side, iperf client on AP side > This is the correct answer. - [ ] iperf client on STA side, iperf client on AP side > This is wrong ! - [ ] iperf server on STA side, iperf server on AP side > This is wrong ! ## Successful connection of station to AP is indicated by ? - [ ] wpa_state=SCANNING > This is wrong ! - [x] wpa_state=COMPLETED > This is the correct answer. - [ ] wpa_state=STARTED > This is wrong ! - [ ] None of the above > This is wrong ! ## DHCP stands for ? - [x] Dynamic Host Configuration Protocol > This is the correct answer. - [ ] Dynamic Host Correction Protocol > This is wrong ! - [ ] Dynamic HDD Configration Protocol > This is wrong ! - [ ] None of the above > This is wrong ! ## DORA stand for ? - [x] DHCP Discover, DHCP Offer, DHCP Request, DHCP ACK > This is the correct answer. - [ ] DHCP DIFS, DHCP Offer, DHCP Request, DHCP ACK > This is wrong ! - [ ] DHCP Discover, DHCP offer, DHCP Response, DHCP ACK > This is wrong ! - [ ] DHCP Discover, DHCP offer, DHCP Response, DHCP Arrange > This is wrong ! ## ARP stands for ? - [x] Address Resolution Protocol > This is the correct answer. - [ ] Address Request Protocol > This is wrong ! - [ ] Address Response Protocol > This is wrong ! - [ ] Address Receive Protocol > This is wrong ! ## ICMP stands for ? - [x] Internet Control Message Protocol > This is the correct answer. - [ ] Internet Common Message Protocol > This is wrong ! - [ ] Internet Control Manage Protocol > This is wrong ! - [ ] Internet Common Manage Protocol > This is wrong ! ## TCP stands for ? - [x] Transmission Control Protocol > This is the correct answer. - [ ] Transmission Common Protocol > This is wrong ! - [ ] Transaction Control Protocol > This is wrong ! - [ ] Transaction Common Protocol > This is wrong ! ## UDP stands for ? - [x] User Datagram Protocol > This is the correct answer. - [ ] User Datapath Protocol > This is wrong ! - [ ] Usage Datagram Protocol > This is wrong ! - [ ] Usage Datapath Protocol > This is wrong ! ## ping application uses ? - [ ] User Datagram Protocol - UDP > This is wrong ! - [ ] Transmission Control Protocol - TCP > This is wrong ! - [x] Internet Control Message Protocol - ICMP > This is the correct answer. - [ ] None of the above > This is wrong ! ## In 802.11 Open security mode, authentication phase uses ? - [ ] Four authentication packets > This is wrong ! - [ ] Six authentication packets > This is wrong ! - [x] Two authentication packets > This is the correct answer. - [ ] One authentication packet > This is wrong ! ## In 802.11 Open security mode, association phase uses ? - [ ] Four association packets > This is wrong ! - [ ] Six association packets > This is wrong ! - [x] Two association packets > This is the correct answer. - [ ] One association packet > This is wrong ! ## ARP is used to resolve ? - [ ] IPv4 address > This is wrong ! - [ ] IPv6 address > This is wrong ! - [x] MAC address > This is the correct answer. - [ ] None of the above > This is wrong ! ## In 802.11, AP stands for ? - [ ] Address Point > This is wrong ! - [ ] Access Protocol > This is wrong ! - [x] Access Point > This is the correct answer. - [ ] Address Protocol > This is wrong ! ## In 802.11, STA stands for ? - [ ] Standard > This is wrong ! - [ ] Stamp > This is wrong ! - [x] Station > This is the correct answer. - [ ] None of the above > This is wrong ! ## How to release IP address of a network interface in Ubuntu ? - [ ] sudo dhclient -i wlan1 > This is wrong ! - [ ] sudo ifconfig wlan1 up > This is wrong ! - [x] sudo dhclient -r > This is the correct answer. - [ ] None of the above > This is wrong ! ## How to assign IP address to a network interface in Ubuntu using DHCP ? - [ ] sudo dhclient -r > This is wrong ! - [ ] sudo ifconfig wlan1 up > This is wrong ! - [x] sudo dhclient -i wlan1 > This is the correct answer. - [ ] None of the above > This is wrong ! ## In 802.11, Beacon packet is sent by ? - [ ] Monitor mode > This is wrong ! - [ ] Station > This is wrong ! - [x] Access Point > This is the correct answer. - [ ] None of the above > This is wrong ! ## In 802.11, Probe-Response packet is sent by ? - [ ] Monitor mode > This is wrong ! - [ ] Station > This is wrong ! - [x] Access Point > This is the correct answer. - [ ] None of the above > This is wrong ! ## In 802.11, Authentication Request packet is sent by ? - [ ] Monitor mode > This is wrong ! - [ ] Access Point > This is wrong ! - [x] Station > This is the correct answer. - [ ] None of the above > This is wrong ! ## In 802.11, Association Request packet is sent by ? - [ ] Monitor mode > This is wrong ! - [ ] Access Point > This is wrong ! - [x] Station > This is the correct answer. - [ ] None of the above > This is wrong ! ## In 802.11, Association Response packet is sent by ? - [ ] Monitor mode > This is wrong ! - [ ] Station > This is wrong ! - [x] Access Point > This is the correct answer. - [ ] None of the above > This is wrong ! ## In 802.11, Authentication Response packet is sent by ? - [ ] Monitor mode > This is wrong ! - [ ] Station > This is wrong ! - [x] Access Point > This is the correct answer. - [ ] None of the above > This is wrong ! ## In output of iwconfig command, which field is not seen ? - [ ] ESSID > This is wrong ! - [ ] Mode > This is wrong ! - [x] mtu > This is the correct answer. - [ ] Power management > This is wrong ! ## In output of ifconfig command, which field is not seen ? - [ ] mtu > This is wrong ! - [ ] ether > This is wrong ! - [x] ESSID > This is the correct answer. - [ ] flags > This is wrong ! ## cd ../ means ? - [ ] Change to previous to previous directory > This is wrong ! - [ ] Change to next directory > This is wrong ! - [x] Change to previous directory > This is the correct answer. - [ ] None > This is wrong ! ## Command to delete a directory ? - [ ] cp > This is wrong ! - [ ] touch > This is wrong ! - [x] rm or rmdir > This is the correct answer. - [ ] cat > This is wrong ! ## Command to copy a file ? - [ ] ls > This is wrong ! - [ ] touch > This is wrong ! - [x] cp > This is the correct answer. - [ ] cat > This is wrong ! ## Command to start a network manager in Ubuntu ? - [ ] sudo /etc/init.d/network-manager stop > This is wrong ! - [ ] touch > This is wrong ! - [x] sudo /etc/init.d/network-manager start > This is the correct answer. - [ ] cat > This is wrong ! ## Command to start DHCP Server in Ubuntu ? - [ ] sudo /etc/init.d/network-manager stop > This is wrong ! - [ ] sudo service isc-dhcp-server stop > This is wrong ! - [x] sudo service isc-dhcp-server start > This is the correct answer. - [ ] sudo /etc/init.d/network-manager start > This is wrong ! ## iperf -c is ? - [ ] iperf help > This is wrong ! - [ ] iperf server > This is wrong ! - [x] iperf client > This is the correct answer. - [ ] iperf configuration > This is wrong ! ## How to create monitor mode interface ? - [ ] sudo iw dev wlan1 add moni0 type monitor > This is wrong ! - [ ] sudo iw dev wlan1 interface del moni0 type monitor > This is wrong ! - [x] sudo iw dev wlan1 interface add moni0 type monitor > This is the correct answer. - [ ] sudo iw dev wlan1 interface add moni0 mode monitor > This is wrong ! ## Which command is used to capture protocol packets ? - [ ] cat > This is wrong ! - [ ] sudo iw dev wlan1 interface del moni0 type monitor > This is wrong ! - [x] wireshark > This is the correct answer. - [ ] grep > This is wrong ! ## What is the right sequence used for connection in Open security ? - [ ] Authentiaction, Scanning, Association, Ping, DORA > This is wrong ! - [ ] Association, Authentication, DORA, Ping > This is wrong ! - [x] Scanning, Authentication, Association, DORA, Ping > This is the correct answer. - [ ] Association, DORA, Ping, Authentication, Scanning > This is wrong ! ## cd $HOME means ? - [ ] Change directory to previous directory > This is wrong ! - [ ] Change directory to /home > This is wrong ! - [x] Change directory to /home/user > This is the correct answer. - [ ] Change directory to next directory > This is wrong ! ## "cp defconfig .config" means ? - [ ] Copy contents of file .config to file .config > This is wrong ! - [ ] Copy contents of file defconfig to file defconfig > This is wrong ! - [x] Copy contents of file defconfig to file .config > This is the correct answer. - [ ] Copy contents of file .config to file defconfig > This is wrong ! ## "sudo vim ./run_supplicant.conf" means ? - [ ] Rename file run_supplicant.conf > This is wrong ! - [ ] Delete file run_supplicant.conf > This is wrong ! - [x] Open file run_supplicant.conf for edit > This is the correct answer. - [ ] Open file run_supplicant.conf for close > This is wrong ! ## DHCP Discover packet is ? - [ ] sent from AP to AP > This is wrong ! - [ ] sent from STA to STA > This is wrong ! - [x] sent from STA to AP > This is the correct answer. - [ ] sent from AP to STA > This is wrong ! ## DHCP Request packet is ? - [ ] sent from AP to AP > This is wrong ! - [ ] sent from STA to STA > This is wrong ! - [x] sent from STA to AP > This is the correct answer. - [ ] sent from AP to STA > This is wrong ! ## DHCP ACK packet is ? - [ ] sent from AP to AP > This is wrong ! - [ ] sent from STA to STA > This is wrong ! - [x] sent from AP to STA > This is the correct answer. - [ ] sent from STA to AP > This is wrong !