Ministry of higher and secondary special education of the republic of uzbekistan the ministry for development of information


Connecting to an Already Created Ad-Hoc Network


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Manual Wireless networks

Connecting to an Already Created Ad-Hoc Network 
The configuration of the computers connecting to an already created Ad-Hoc 
wireless network is the same as connecting to any other type of wireless network. 
Figure 13.14 shows the available wireless networks as shown on the other 
computers. The different icon shown to the right of each network name shows the 
type of wireless network. 
Fig. 13.14. Open Network and Sharing Center 
Simply select the network and choose connect. If no wireless security was 
selected, then the network will be connected; if wireless security was configured 
then the window shown in Figure 13.15 will be displayed to allow the entry of the 
security key. 
Fig. 13.15. Wireless Security 
Once the network is connected, the network will show as connected as shown in 
Figure 13.16. 


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Fig. 13.16: Connected to Wireless Ad-Hoc Network 
IP Addressing in Ad-Hoc Networks 
Now, another important thing to remember is that typically there is no DHCP 
server running on computer hosts. What this means is that there will be no IP address 
automatically assigned as is typically done when using a wireless router or access 
point. 
Two options are available: either to use APIPA addressing (169.254.0.0/16) 
which will permit a connection between the two computers automatically when a 
DHCP server is unable to be contacted or using 
static IP addressing

Figures 13.17 and 18 show the output from the ‘ipconfig' and ‘arp –a' 
commands on two computers connected via an Ad-Hoc network using APIPA 
addressing. The two computers' addresses can be seen in each other's ARP tables. 
 
Fig. 13.17. Windows IP Configuration 


102 
 
Fig. 13.18. Windows IP Configuration 
The Ad-Hoc network is very useful when trying to connect computers 
together which have wireless capabilities and no active wireless router or access 
point to connect them together. If the need to network computers together in these 
situations happens, the Ad-Hoc option is certainly an easy to setup option which 
enables these abilities. 


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