[개발관련] 사설 IP 관련 조사

Private IP addressing is a concept in networking where a specific range of IP addresses is designated for use within a local network. These addresses are non-routable on the internet, meaning they cannot be directly accessed or communicated with from outside the local network. The purpose of private IP addresses is to provide a level of security and isolation within the local network. Only devices within the same network can see and communicate with each other using their private IP addresses.
Here are some key points about private IP addressing:
Private IP addresses are assigned by the network router to devices within the local network.They are used for local communication and are not visible or accessible on the internet.Private IP addresses are defined within specific ranges reserved by the Internet Assigned Numbers Authority (IANA).The three ranges of private IP addresses are as follows:Class A: 10.0.0.0 to 10.255.255.255Class B: 172.16.0.0 to 172.31.255.255Class C: 192.168.0.0 to 192.168.255.255Private IP addresses provide more security within a network as they are not exposed to the internet.They allow devices within the local network to communicate with each other without needing to connect to the internet.Private IP addresses can be reused in different networks, unlike public IP addresses which are unique for each device on the internet.
It's important to note that private IP addresses are not routable on the internet by default. Most internet service providers (ISPs) have hardcoded access control lists (ACLs) to prevent routing of private IP traffic. Additionally, the Border Gateway Protocol (BGP), the core routing protocol of the internet, only advertises public routes. This means that private IP addresses are not propagated or routed across the internet.
To further enforce the isolation of private IP addresses, routers and network devices often have ACLs configured to block traffic with private addresses from traversing their interfaces. This helps to prevent any accidental leakage of private IP traffic to the public internet.

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