What is “DNS caching”?
a) Storing DNS query results locally to speed up future queries
b) Encrypting DNS traffic for security
c) Assigning IP addresses to devices
d) Blocking access to certain websites
Answer:
a) Storing DNS query results locally to speed up future queries
Explanation:
DNS caching is the process of storing DNS query results temporarily on a device or local network. This allows future requests for the same domain name to be resolved more quickly by using the cached result rather than querying the DNS server again.
By caching DNS results, devices can load websites faster, as the process of translating domain names into IP addresses is done more efficiently. However, cached information can sometimes become outdated, leading to potential issues in accessing updated websites.
DNS caching improves network performance by reducing the time it takes to resolve domain names and minimizing traffic to external DNS servers.