CyberCertPrepNetwork FundamentalsDNS & DHCPEASYFree question
Scenario
A student asks why their home router at 192.168.1.1 shows up as the DNS server in ipconfig, and why it responds to DNS queries even though it is not a real DNS server.
What DNS function does a home router's DHCP server typically configure, and how does this work?
- A.The home router is the authoritative DNS server for all .com domains
- B.The home router acts as a DNS forwarder/proxy: DHCP advertises the router's LAN IP (192.168.1.1) as the DNS server so clients send queries to it; the router forwards all queries to the upstream ISP DNS servers (received via DHCP on the WAN side) or to configured public resolvers; the router may also cache responses to reduce latency for repeated queries within the home network
- C.The home router performs full recursive DNS resolution starting from root servers
- D.The home router blocks all DNS queries and forces clients to use IP addresses only
Why B is correct