DNS

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What is DNS

DNS (Domain Name System) is the “phone book” of the internet. It translates human-readable domain names (like www.google.com) into machine-readable IP addresses (like 142.250.80.46). Without DNS, you’d have to memorize IP addresses for every website you visit.

How DNS Resolution Works

When you type mlp.sankuai.com in your browser, a chain of lookups happens:

Browser cache → OS cache → Router → Recursive Resolver → Root Server → TLD Server → Authoritative Server

Step by step:

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What is Fake-IP

Fake-IP is a DNS resolution strategy used by proxy tools like Clash (Mihomo), Clash Verge, and similar transparent proxy software. Instead of performing a real DNS lookup when an application requests a domain, the proxy immediately returns a fabricated IP address from a reserved subnet (typically 198.18.0.0/16). The proxy maintains an internal mapping table between these fake IPs and the original domains, so when traffic is later routed to a fake IP, the proxy knows which domain the traffic was actually destined for.