Question

Consider the following environment with a local dns caching resolver and a set of authoritative dns name servers

• the caching resolver cache is empty,
• TTL values for all records is 1 hour,
• RTT between stub resolvers (hosts A, B, and C) and the caching resolver is 20 ms,
• RTT between the caching resolver and any of the authoritative name servers is 150 ms
• There are no packet losses•All processing delays are 0 ms

Answer 1

Normally in a DNS server, There are no packet losses•All processing delays are 0 ms

Step-by-step explanation:

If any packet lost in DNS then lost in the connection information will be displayed in prompt. Once the packet is lost then data is lost. So if the packet is lost then data communications are lost or the receiver will receive data packet in a lost manner, it is useless.

To connect in windows normally it will take 90 ms for re-establish connection it normally delays the time in windows. So that end-user he or she for best performance ping the host or gateway in dos mode so that connection or communication will not be lost. If any packet is dropped DNS will get sent the packet from sender to receiver and the ping rate will more in the network traffics.