Select all the statements that are true. (Select 4 ONLY)
DNS uses port 353
DNS uses UDP
DNS poisoning can be accomplished by racing to reply to aquery
DNS cache entries are maintained until manually removed by theadmin
DNS uses port 53
DNS poisoning can be prevented by signed server responses
Answer
DNS uses UDP
DNS poisoning can be accomplished by racing to reply to aquery
DNS port 53
DNS poisoning can be prevented by signed server responses
Explanation: DNS employs the TCP port 53 also to communicationpurpose.Cache poisoning is more complicated to find out.