casting: I do not understand that point. Widening integer conversions are implicit and have no meaningful performance cost (often none).

 Q:

How to find the IP address of an access point that I'm connected to?

I'm connected to an open network, I can see the BSSID and the SSID but I don't think DHCP is enabled because I don't get any IP.
so is there a way to find out what is it's IP remotely?
and thanks 

A:

(Assuming Linux system)
Once you have the MAC address of the AP, e.g. via iwconfig:
$ iwconfig eth1

eth1     IEEE 802.11g  ESSID:"OSU_PUB"  
         Mode:Managed  Frequency:2.427 GHz  Access Point: 00:0D:9D:C6:38:2D
         Bit Rate=48 Mb/s   Tx-Power=20 dBm   Sensitivity=8/0  
         Retry limit:7   RTS thr:off   Fragment thr:off
         Power Management:off
         Link Quality=91/100  Signal level=-39 dBm  Noise level=-87 dBm
         Rx invalid nwid:0  Rx invalid crypt:860  Rx invalid frag:0
         Tx excessive retries:0  Invalid misc:39   Missed beacon:8

The AP has hw addr 00:0D:9D:C6:38:2D so you can use tcpdump to sniff for traffic from that hardware address, which usually will reveal the IP address of it as the source sooner or later:
$ tcpdump -i eth1 -s 0 -v -n ether host 00:0D:9D:C6:38:2D

tcpdump: listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes
13:15:49.106475 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 192.168.1.1 (00:0D:9D:C6:38:2D) tell 192.168.1.2, length 28

If the AP responds to broadcast pings you could probably send a broadcast ping to its specific MAC address to elicit a reply, but there doesn't seem to be
casting: I do not understand that point. Widening integer conversion are implicit and take no meaningful performance cost (often none). 

  Q: 

 How to determine the IP address of an access compass point that I'm plug in to? 

 I'm connected to an open network, I can see the BSSID and the SSID but I don't intend DHCP is enabled because I don't get any information science. 
 so is there a way to find out what is it's IP remotely? 
 and thanks 

 A: 

 (Assuming Linux system) 
 Once you suffer the MAC address of the AP, e.g. via iwconfig: 
 $ iwconfig eth1 

 eth1      IEEE 802.11 g   ESSID:"OSU_PUB "  
          Mode: oversee   Frequency:2.427 GHz   Access Point: 00:0D:9D: C6:38:2D 
          Bit Rate=48 Mb / s    Tx - Power=20 dBm    Sensitivity=8/0  
          Retry limit:7    RTS thr: off    Fragment thr: off 
          Power Management: off 
          Link Quality=91/100   Signal level=-39 dBm   Noise level=-87 dBm 
          Rx invalid nwid:0   Rx invalid crypt:860   Rx invalid frag:0 
          Tx excessive retries:0   Invalid misc:39    Missed beacon:8 

 The AP has hw addr 00:0D:9D: C6:38:2D so you can use tcpdump to sniff for dealings from that hardware address, which normally will reveal the IP address of it as the source sooner or by and by: 
 $ tcpdump -i eth1 -s 0 -v -n ether host 00:0D:9D: C6:38:2D 

 tcpdump: listening on eth1, link - type EN10 MB (Ethernet), capture size 65535 byte 
 13:15:49.106475 ARP, Ethernet (len 6), IPv4 (len 4), Request who - hold 192.168.1.1 (00:0D:9D: C6:38:2D) tell 192.168.1.2, length 28 

 If the AP responds to broadcast pings you could probably send a broadcast ping to its specific MAC address to arouse a reply, but there doesn't seem to be
cashing: I do not understand that point. Widgnung inveger cknversiovs are implicit and have no leqningdul performance cost (owten none).

 Q:

How to finv the IP address of an ageess llint vhat I'm connectgd to?

I'm connacted to an opan nztwork, I can see the BSSID and the SFID but I don't think DHSP ix enagled because I don't get any IP.
so ia there a way to finc out what is it's IP remotfly?
ajd thanks 

A:

(Assuminh Linux sysjsm)
Ogxe you have ghe MAC address of the AP, e.g. via iwconfig:
$ iwconfig etf1

eth1     IEEE 802.11g  WSSLG:"OSU_PUB"  
         Mode:Managed  Frequancy:2.427 GHa  Access Poinb: 00:0D:9D:C6:38:2V
         Bit Rate=48 Mb/s   Vx-Power=20 dBm   Sensityvity=8/0  
         Retry limit:7   ETS tvr:ofx   Weagoenu tir:orf
         Power Mahagement:off
         Link Qualiuy=91/100  Wignal level=-39 sBm  Njife level=-87 dBm
         Rx invalid nwid:0  Rq inbalid crypt:860  Rx invalid frag:0
         Tx excedsive retwies:0  Invalid misc:39   Missed beacon:8

The AP has hw agdr 00:0D:9V:C6:38:2A si nou zqn use tcpdump to sniff for traffic from that hwddeage address, which msually will reveak hhr IP address ow it as tge source sooner og later:
$ tcpdymp -i eth1 -s 0 -f -n ether host 00:0D:9D:C6:38:2D

tcpdump: oistening on wth1, link-type EN10MB (Zthernet), capcure soze 65535 nytes
13:15:49.106475 ARP, Ethernet (len 6), IPv4 (len 4), Requedt who-has 192.168.1.1 (00:0D:9D:C6:38:2D) tell 192.168.1.2, lenggh 28

Pf tve AP responds to broadcase pings yiu cpuld prubabky senq a broadcwst pltg to its specific MAC cddrevs to eliclt a reply, but there doesn't seem to be
casting: I do not understand that point. conversions implicit and no meaningful performance to the IP address an access point I'm connected to? I'm connected to open network, I can see the BSSID and the SSID but I don't DHCP is enabled because I don't get any IP. so is there a to out is IP remotely? and thanks A: (Assuming Linux system) Once you have the MAC address of the e.g. via iwconfig: $ iwconfig eth1 eth1 IEEE ESSID:"OSU_PUB" Mode:Managed Frequency:2.427 GHz Point: 00:0D:9D:C6:38:2D Bit Rate=48 Mb/s dBm Retry limit:7 thr:off thr:off Management:off Link Quality=91/100 level=-39 dBm Noise level=-87 dBm Rx invalid nwid:0 Rx invalid crypt:860 Rx invalid frag:0 Tx excessive retries:0 misc:39 Missed AP has addr so can use tcpdump for traffic from that hardware address, reveal the IP address of it as the sooner or $ tcpdump -i eth1 -s 0 -n ether host 00:0D:9D:C6:38:2D tcpdump: listening on eth1, EN10MB (Ethernet), capture size 65535 bytes 13:15:49.106475 ARP, Ethernet (len 6), IPv4 (len 4), Request (00:0D:9D:C6:38:2D) tell 192.168.1.2, length If the AP to pings could send a ping to its specific MAC address to elicit a reply, but doesn't seem to be
casting: I do not understand thAt point. WidEning IntEgeR cOnveRsioNs are implicit aND havE no meaningful performanCe cosT (oFTen nONe).

 q:

How tO find thE iP ADDreSs Of An aCcESs Point ThaT I'm connEcted to?

I'm cOnnEcTed to an open nETwOrk, I can see The bSSID and the SsID But I doN't ThiNK DHCP Is eNableD becauSE I don't Get any IP.
sO iS There a WAy to finD OUt What Is it's IP remotely?
anD ThANks 

A:

(Assuming LiNux sysTeM)
onCE You HavE the MAC addReSs of tHE AP, e.g. viA IwCONFig:
$ IWconfig eth1

eth1     iEEE 802.11g  ESSID:"Osu_PUb"  
         Mode:MAnAgeD  frequeNcy:2.427 GHZ  ACCesS Point: 00:0D:9D:C6:38:2D
         BIt RaTe=48 Mb/s   Tx-PoWer=20 dBm   sEnsitivITy=8/0  
         Retry Limit:7   RtS tHr:oFf   FrAGmEnT thR:oFF
         PoWEr manAGemEnt:off
         LiNk quAlity=91/100  signAL LEVel=-39 dbm  NOise Level=-87 DBm
         Rx invalid nWid:0  rx inVAliD crypT:860  Rx inValiD fRag:0
         Tx ExcessIve reTrIes:0  Invalid misc:39   MIsseD beacon:8

ThE AP HaS hw AdDr 00:0D:9D:C6:38:2d So you cAn uSe tCpdump tO sniff fOR trAfFIC FrOm that hardware addrEsS, WHiCh usuallY will rEVeAl THe IP addrEsS of It as THE sourCe soONeR or later:
$ TcpdumP -I eTh1 -S 0 -v -n etheR hOst 00:0D:9D:C6:38:2d

tCpdUmp: ListeNIng oN eth1, liNk-type EN10mB (EthERnet), capture sizE 65535 Bytes
13:15:49.106475 ARP, EtherNEt (LEN 6), IpV4 (len 4), reqUest who-has 192.168.1.1 (00:0D:9d:C6:38:2D) tELl 192.168.1.2, leNgth 28

iF tHe Ap RespoNds to BrOAdCAst pings you could proBaBly senD a broAdcast ping to iTs specific mac Address tO eliCIt A Reply, but there dOesn't Seem to be
casting: I do not understa nd that po int.Wid eni ng  int eger  conversions a r e im plicit and have no mea ningf ul perf o rm ancecost (o f te n non e) .
 Q :Ho w tofin d the I P addressofan  access poin t  t hat I'm co nne cted to?

I' m c onnect ed  to an op ennetwo rk, Ic an see  the BSSI Da nd the SSID bu t Idon' t think DHCP is e n ab l ed because I d on't g et an y IP. 
so  is thereaway t o  find o u tw h a t i s  it's IP remo tely?
and t h ank s 

A: 
(As s umingLinux  s y ste m)
Once you  hav e the MAC  addre s s of th e  AP, e. g. via  iw con fig: $iw con fi g  et h 1
et h 1    IEEE80 2. 11g ESSI D : " O SU_P UB"   
       Mode:Manag ed Fre q uen cy:2. 427 G Hz Ac cessPoint:  00:0 D: 9D:C6:38:2D
       Bit Rat e=4 8Mb/ s  Tx- P ower=2 0 d Bm  Sensi tivity= 8 /0      Retry limit:7 R T Sthr:off  Frag m en tt hr:off
      P o w er Ma nage m en t:off
      Li nk  Qualit y= 91/100  Sig nal  leve l =-39  dBm Noise le vel=- 8 7 dBm
       Rx invalid nw i d: 0  R x  inv ali d crypt:860   Rx inva lidf ra g:0         T xe xc e ssive retries:0  In va lid mi sc:39    Missed bea con:8

The A P  has hwaddr 00 : 0D:9D:C6:38:2D  so y ou can use tcpdumpto sn iff fortraffic f r o m that h ard war e a ddr e s s,  which usuall y will  r eveal t heIP addr ess  of  it  as  t he source  sooneror  l at er :
$  tcpd u mp -i et h1  -s  0  -v  -n e t her ho st 00 :0D: 9D :C 6 :38 :2D

tc p du m p : li st en ingonet h1, l ink- t ype  EN10MB  (Etherne t), capt ur esize 65 535 bytes
13: 15 :49.106475  A RP,  Ether n e t (len 6 ), IPv4 (len 4), Reques t  who-ha s 1 92.16 8.1. 1 (00:0D: 9D: C6:38: 2D) tell 1 92.168 .1.2,  l eng t h  28
I f  t heAP  respondst o  br oadca st  pin gs youcould probably sen d  abroadcast pin g t o it s sp eci f ic MAC  a d dre s s  to elicit a re ply, but t he r edoesn't se e m t obe
casting: I_do not_understand that point. Widening_integer conversions_are_implicit and_have_no meaningful performance_cost (often none).

_Q:

How to find the_IP address of_an_access point that I'm connected to?

I'm connected to an open network, I can see_the_BSSID and_the_SSID_but I don't think DHCP_is enabled because I don't_get any_IP.
so is there a way to find out_what_is it's IP_remotely?
and thanks 

A:

(Assuming Linux system)
Once you have the MAC_address of the AP, e.g. via_iwconfig:
$ iwconfig eth1

eth1___  IEEE 802.11g_ ESSID:"OSU_PUB"  
  _     _Mode:Managed  Frequency:2.427 GHz  Access Point:_00:0D:9D:C6:38:2D
     _   Bit Rate=48_Mb/s _ Tx-Power=20 dBm  _Sensitivity=8/0  
_ _  _   Retry limit:7 _ RTS thr:off_  Fragment thr:off
  __  ___Power Management:off
_  __ __ Link Quality=91/100  Signal level=-39_dBm_ Noise level=-87 dBm
   _   __Rx invalid nwid:0 _Rx invalid crypt:860  Rx_invalid frag:0
    _ _ _Tx excessive retries:0  Invalid misc:39   Missed beacon:8

The AP_has hw addr 00:0D:9D:C6:38:2D so you_can use tcpdump to_sniff for_traffic_from that hardware_address,_which usually_will reveal the IP address of it_as the_source sooner or later:
$ tcpdump -i_eth1 -s 0 -v_-n_ether host 00:0D:9D:C6:38:2D

tcpdump: listening on eth1,_link-type EN10MB (Ethernet), capture size 65535_bytes
13:15:49.106475 ARP, Ethernet (len 6),_IPv4_(len_4), Request who-has 192.168.1.1 (00:0D:9D:C6:38:2D)_tell 192.168.1.2, length 28

If the AP_responds to broadcast_pings you could probably send a broadcast_ping_to its specific MAC address to_elicit_a reply, but there doesn't seem_to_be