Chapter 1
Networking Concepts
Course: Comptia Network N10 009 Practice Test
Subject: Comptia Network N10 009
Chapter: Networking Concepts
Public vs. Private IP Addresses
Public IP Addresses
Definition: Public IP addresses are globally unique addresses assigned to devices for communication over the internet. These addresses allow devices to be identified and accessed directly across the global internet infrastructure.
Characteristics:
- Global Uniqueness: Managed and allocated by the Internet Assigned Numbers Authority (IANA) or Regional Internet Registries (RIRs) like ARIN (North America) or APNIC (Asia-Pacific). Each address must be unique to avoid conflicts in the global addressing system.
- Accessibility: Public IP addresses can be accessed from any other device on the internet, making them critical for internet-facing services like websites, email servers, and cloud applications.
- Static vs. Dynamic:
Static Public IPs: Fixed addresses assigned to servers or critical services. Example: Hosting a company’s website. Dynamic Public IPs: Temporarily assigned by Internet Service Providers (ISPs) to devices like home routers. Example: IP reassigned after restarting the router.
- Static Public IPs: Fixed addresses assigned to servers or critical services. Example: Hosting a company’s website.
- Dynamic Public IPs: Temporarily assigned by Internet Service Providers (ISPs) to devices like home routers. Example: IP reassigned after restarting the router.