The Domain Name System

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Affirmations about the DNS

Which of the following sentences about the DNS are correct ?

A NS record contains the name of the nameserver that is responsible for a domain

A client can contact any root nameserver to convert www.computer-networking.info into an IP address

A NS record contains the IPv4 address of the nameserver that is responsible for a domain

An A record contains an IPv4 address

When a client sends a query to retrieve the IP address corresponding to www.computer-networking.info to its local resolver, the resolver may need to query different nameservers to return the answer.

A MX record contains the name of the mailserver that accepts emails for a domain

The TTL associated to a DNS record indicates the time in seconds during which this record can be cached by resolvers.

An AAAA record contains an IPv6 address

יוצרים	Olivier Bonaventure
מועד הגשה	אין מועד הגשה
מגבלת הגשות	אין הגבלה
תגיות קטגוריה	dns

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