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Exam XK0-005 topic 1 question 103 discussion

Actual exam question from CompTIA's XK0-005
Question #: 103
Topic #: 1
[All XK0-005 Questions]

A cloud engineer needs to block the IP address 192.168.10.50 from accessing a Linux server. Which of the following commands will achieve this goal?

  • A. iptables -F INPUT -j 192.168.10.50 -m DROP
  • B. iptables -A INPUT -s 192.168.10.30 -j DROP
  • C. iptables -i INPUT --ipv4 192.168.10.50 -z DROP
  • D. iptables -j INPUT 192.168.10.50 -p DROP
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Suggested Answer: B 🗳️
by MissAllen at Nov. 6, 2022, 12:29 a.m.

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MissAllen
Highly Voted 1 year, 6 months ago
B is best, but the IP address is wrong.
upvoted 9 times
...
Alizadeh
Most Recent 8 months, 3 weeks ago
Selected Answer: B
The correct answer is B. iptables -A INPUT -s 192.168.10.50 -j DROP.
upvoted 1 times
...
linux_admin
1 year, 2 months ago
B. iptables -A INPUT -s 192.168.10.30 -j DROP
upvoted 1 times
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Ckl22
1 year, 4 months ago
MissAllen is right, B is the answer here. "-A" appends the rule, "-s" is source address, and "-j" is the action if the rule is matched, so DROP
upvoted 3 times
...
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C (25%)
B (20%)
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