Which of the following is not one of the key issues of link state protocols?
a. Finds neighbors/adjacencies
b. Uses route advertisements to build routing table
c. Sends "Hello" packets for routing tables
d. Sends updates when routing changes
c. Sends "Hello" packets for routing tables
Explanation: Link state protocols use "Hello" packets to verify communication with neighbor routers. The routers exchange link state advertisements to update neighbors regarding route status. The link state advertisements are sent only if there is a change or loss in the network routes and the link state protocols converge to route selection quickly.
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