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Option 4 : Network of C2
In an office, two phones P1 and P2 are connected to LAN L1 & L2 respectively. If LAN is not in operation, the both the phones can be used for telecommunication.
[ alt="14.05.2018.001.007" src="//storage.googleapis.com/tb-img/production/18/05/14.05.2018.001.007.JPG">
→ L1 can be used for computer C1 and C2 only
→ L2 can be used for computer C1 and C3 only
[ alt="14.05.2018.001.008" src="//storage.googleapis.com/tb-img/production/18/05/14.05.2018.001.008.JPG" style="height:159px; width:258px">
If L1 is not in operation, then P1 (telecom) will work and C1 will work with network of L2. So, only network of C2 will not network.
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