Private IP address

• A. An IP address assigned by a public DNS server
• B. An IP address used only for video streaming
• C. An IP address that cannot be routed over the Internet allows devices within the network to talk without using internet
• D. An IP address that is globally unique

Answer: (C)

Private IP addresses are non-routable on the public Internet. They let devices inside a local network talk to each other without using Internet connectivity, because routers on the Internet won’t forward packets with these addresses. When those devices reach outside networks, a gateway typically uses NAT to translate the private address to a public one for Internet access. Because these addresses aren’t meant to be unique worldwide, the same private ranges can be reused in different networks. This is what the option describing an IP that cannot be routed over the Internet is getting at. The other statements aren’t how IPs are used: public DNS servers don’t assign addresses themselves, IPs aren’t restricted to a single service like video streaming, and an IP that is globally unique describes public addresses, not private ones.