RFC 1918 Explained: Private IP Addressing Quiz & Flashcards

What is the primary reason for not running out of IPv4 addresses despite the large number of users on the internet?

What is the purpose of RFC 1918?

What is the benefit of using private IP addresses inside corporate networks?

What type of addresses can be used without reporting to the internet authorities?

What is the scope of RFC 1918 in terms of IP address allocation?

What is the result of using private IP addresses from RFC 1918?

What type of entity can use private IP addresses from RFC 1918?

What is the specific range of IP addresses that can be used without reporting to authorities?

What is the primary reason companies use RFC 1918 private address space?

What is the purpose of DHCP in a corporate network?

What is the challenge of using RFC 1918 addresses in a corporate network?

What is the solution to the problem of RFC 1918 addresses not being routable over the public internet?

What type of IP addresses are used on the internet?

What is the purpose of a default gateway in a corporate network?

What is the primary advantage of using RFC 1918 private address space?

What is the relationship between NAT and PAT?

Why do companies likely use DHCP in their corporate networks?

What is the primary difference between private RFC 1918 addresses and routable IPv4 addresses?

IPv4 addresses are not infinite, and there's a shortage due to millions of internet users.
One solution is to use private IP addresses inside corporate networks, as described in RFC 1918.

RFC 1918 is a standard for private IP addresses used inside organizations.
It sets aside specific IP address ranges for corporations to use without needing to report or assign.
These private addresses can be used without coordination with the internet.

Companies use DHCP to assign private IP addresses to devices.
Devices receive an IP address, subnet mask, DNS server, and default gateway.
Most corporations use private IP addresses because they don't need to report to an official service.

Private IP addresses are not routed on the public internet.
If a device with a private IP address wants to access the internet, it needs to be translated into a routable IP address.

NAT translates private IP addresses into routable IP addresses for internet communication.

This process is achieved through the use of a Layer 3 router, which examines the source and destination IP addresses of outgoing and incoming data packets, respectively. By substituting the private IP addresses with the public IP address of the router, NAT enables multiple devices on the private network to share the same public IP address.
This allows devices on a private network to access the internet using a shared public IP address.

This is particularly useful in large-scale networks, where the number of public IP addresses may be limited. By implementing NAT, network administrators can conserve IP address space and simplify network management.