What is the role of test automation in security testing?

As a securing consultant, what are some of the things you would recommend to a company to ensure DNS security?

Which of the following tools is used to analyze the files produced by several packet-capture programs such as tcpdump, WinDump, Wireshark, and EtherPeek?

Ricardo wants to send secret messages to a competitor company. To secure these messages, he uses a
technique of hiding a secret message within an ordinary message. The technique provides 'security
through obscurity'.
What technique is Ricardo using?

The network administrator at Spears Technology, Inc has configured the default gateway Cisco router's access-list as below:
You are hired to conduct security testing on their network.
You successfully brute-force the SNMP community string using a SNMP crack tool.
The access-list configured at the router prevents you from establishing a successful connection.
You want to retrieve the Cisco configuration from the router. How would you proceed?