Exam: 200-301: Cisco Certified Network Associate (CCNA) 0 Likes
What is an appropriate use for private IPv4 addressing? (CCNA 200-301)
What is an appropriate use for private IPv4 addressing?
A) to allow hosts inside to communicate in both directions with hosts outside the organization.
B) on internal hosts that stream data solely to external resources.
C) on the public-facing interface of a firewall.
D) on hosts that communicate only with other internal hosts.
Solution
Correct answer: D) on hosts that communicate only with other internal hosts.
Private IPv4 addresses, as defined in RFC 1918, are intended for use on internal networks where the hosts only need to communicate with other hosts within the same organization. Some appropriate use cases for private IPv4 addressing include:
- Internal servers, workstations, and other devices that do not need direct communication with the public internet
- Network devices like routers, switches, and firewalls that are used to interconnect the internal network
- Virtual machines and containers running on internal infrastructure
The other options are not appropriate uses for private IPv4 addressing:
A. Hosts using private IPv4 addresses cannot directly communicate with hosts on the public internet without the use of Network Address Translation (NAT).
B. Hosts streaming data to external resources should use public IPv4 or IPv6 addresses.
C. The public-facing interface of a firewall should use a public IPv4 or IPv6 address, not a private address.
The key purpose of private IPv4 addressing is to conserve the limited public IPv4 address space by allowing internal networks to use non-routable addresses that can be reused across different organizations.
Category: IP Connectivity