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PHP NETWORKING

PHP Networking
What is the full form of DNS?

Digital Name Systmem
Domain Name System
Domain Network System
Digital Network System

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PHP Networking
Which one of the following function checks for the existence of DNS records?

checkdns()
checkdnsa()
checkdnsrr()
checkdnsr()

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PHP Networking
Which one of the following function is used to return an array consisting of various DNS resource records pertinent to a specific domain?

dnsrr_record()
dns_get_record()
dns_record()
dnsrr_get_record()

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PHP Networking
Which one of the following function is used to retrieve the MX records for the domain specified by hostname?

getmx()
retrieve_mxrr()
retrieve_mx()
getmxrr()

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PHP Networking
What is the default port number of HTTP’s?

90
80
100
70

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