What are two benefits of Private IPv4 Addresses? (Choose two.)
A. they can be implemented without requiring admin to coordinate with IANA
B. they are managed by IANA
C. increase the flexibility of network design
D. provide network isloation from the internet
E. they are routable over internet
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I believe it is A & C. As per RFC 1918, this section refers to choice A:
For a variety of reasons the Internet has already encountered
situations where an enterprise that has not been connected to the
Internet had used IP address space for its hosts without getting this
space assigned from the IANA.
This section refers to choice C:
They gain a lot of flexibility in
network design by having more address space at their disposal than
they could obtain from the globally unique pool.
It specifically says flexibility in network design in the RFC.