Which of the following functions can the analyst use on a shell script to achieve the objective most accurately?

A security analyst is trying to identify anomalies on the network routing.

Which of the following functions can the analyst use on a shell script to achieve the objective most accurately?
A . function x() { info=$(geoiplookup $1) && echo "$1 | $info" }
B . function x() { info=$(ping -c 1 $1 | awk -F "/" ’END{print $5}’) && echo "$1 | $info" }
C . function x() { info=$(dig $(dig -x $1 | grep PTR | tail -n 1 | awk -F ".in-addr" ’{print $1} ‘).origin.asn.cymru.com TXT +short) && echo "$1 | $info" }
D . function x() { info=$(traceroute -m 40 $1 | awk ‘END{print $1}’) && echo "$1 | $info" }

View Answer

Answer: C

Explanation:

The function that can be used on a shell script to identify anomalies on the network routing most accurately is:

function x() { info=(dig(dig -x $1 | grep PTR | tail -n 1 | awk -F “.in-addr” ’{print $1} ‘).origin.asn.cymru.com TXT +short) && echo “$1 | $info” }

This function takes an IP address as an argument and performs two DNS lookups using the dig command. The first lookup uses the -x option to perform a reverse DNS lookup and get the hostname associated with the IP address. The second lookup uses the origin.asn.cymru.com domain to get the

autonomous system number (ASN) and other information related to the IP address. The function then prints the IP address and the ASN information, which can help identify any routing anomalies or inconsistencies