A penetration tester wants to use the following Bash script to identify active servers on a network: 1 network_addr="192.168.1" 2 for h in {1..254}; do 3 ping -c 1 -W 1 $network_addr.$h > /dev/null…

Question

Options

• AChange the condition on line 4.
• BAdd 2>&1 at the end of line 3.
• CUse seq on the loop on line 2.
• DReplace $h with ${h} on line 3.

• A
  5% (1)
• B
  15% (3)
• C
  70% (14)
• D
  10% (2)

Explanation

The provided Bash script is used to ping a range of IP addresses to identify active hosts in a Original Script: 1 network_addr="192.168.1" 2 for h in {1..254}; do 3 ping -c 1 -W 1 $network_addr.$h > /dev/null 4 if [ $? -eq 0 ]; then 5 echo "Host $h is up" 7 echo "Host $h is down" Line 2: The loop uses {1..254} to iterate over the range of host addresses. However, this notation might not work in all shell environments, especially if not using bash directly or if the script runs in a different shell. Using seq for Better Compatibility: The seq command is a more compatible way to generate a sequence of numbers. It ensures the loop works in any POSIX-compliant shell. Modified Line 2: for h in $(seq 1 254); do This change ensures broader compatibility and reliability of the script. Modified Script: 1 network_addr="192.168.1" 2 for h in $(seq 1 254); do 3 ping -c 1 -W 1 $network_addr.$h > /dev/null 4 if [ $? -eq 0 ]; then 5 echo "Host $h is up" 7 echo "Host $h is down"

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