Answer Posted / ramu

dc has advts because
except electro mechanical generators all other readily
available sources of energy is dc.
examples
1. batteries give dc supply based on chemical energy. two types
(a)primary type: non rechargeable i.e zinc carbon
batteries available in AA, AAA, C, D type 1.5 volts cells
(b) secondary rechargeable i.e
lead acid batterie(used in auto mobiles 12v 6v etv)
niickel cadmium cells ( used in camera batteries)
lithium ion batteries ( used in cell phones and
laptops)

2. solar cells also provides dc power

The server is already having the list of IP addresses of all its authorized clients & if any client is requesting the server to do a task, it is sending its IP address(encapsulated in the packet) to the server.The server can easily match that IP address with that on its list and check if it's authorized client or not, then why we need inverse domain...........

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