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

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

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PHP Networking
What will the following script do?
echo getservbyname ('ftp', 'tcp');

The address of the FTP server called “tcp”
The port associated with the TCP service called “FTP”
A list of the ports associated with all services except FTP
A list of the FTP servers on the local network

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