Which option is the proper syntax of the nslookup command in the Cisco ESA CLIto list mail exchangers for domain "cisco.com"?

Question

Options

• Anslookup -d cisco.com -t mx
• Bnslookup mx cisco.com
• Cnslookup -type=mx cisco.com
• Dnslookup cisco.com mx

• A
  6% (2)
• B
  3% (1)
• C
  3% (1)
• D
  88% (28)

Explanation

On the Cisco ESA CLI, the nslookup command uses the positional syntax nslookup <domain> <record-type>, making D (nslookup cisco.com mx) correct - the domain is listed first, followed by the optional record type as a plain argument.

Why the distractors fail:

• A (nslookup -d cisco.com -t mx) uses Unix-style flags (-d, -t) that are not valid in the Cisco ESA CLI environment.
• B (nslookup mx cisco.com) reverses the argument order - putting the record type before the domain, which the ESA CLI does not recognize.
• C (nslookup -type=mx cisco.com) mimics Windows nslookup interactive-mode syntax, which is not applicable to the Cisco ESA CLI.

Memory tip: Think of Cisco ESA's nslookup as "who, then what" - domain first, record type second, with no flags or dashes needed. If you remember that ESA keeps its CLI syntax clean and positional (no hyphens), you can eliminate A and C immediately.

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