Q: During the name resolution process, which technique is used to avoid congestion when querying a server?
or
Q: Which method prevents server query congestion during the name resolution process?
- Redirect
- Hierarchy
- Lookup
- Anycast
Explanation: During the process of name resolution, the practice of caching is used to prevent congestion from occurring. The process of caching includes keeping locally previously resolved DNS requests and the replies that correspond to those queries. An initial check of the cache is performed by the local DNS resolver whenever a client requests that a domain name be resolved. If the information is located, it is returned without the need to query an external DNS server. This helps to reduce the amount of stress on the network and moves the resolution process along more quickly.
