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What is the purpose of link-local addresses in IPv4?
The purpose of this is for automatic assigning for an IP address, for instances when a device cannot obtain an IP address from a DHCP server. They enable local communication on the network segment
What is the purpose of PAT?
It maps multiple internal IP addresses to a single external IP address using different port numbers to differentiate the sessions
Broadcast is one-to?
all within a network segment
Anycast is one to?
nearest among multiple potential receivers sharing the same address