Download CertNexus CyberSec First Responder.CFR-310.NewDumps.2020-05-26.52q.tqb

Vendor: CertNexus
Exam Code: CFR-310
Exam Name: CertNexus CyberSec First Responder
Date: May 26, 2020
File Size: 188 KB

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Demo Questions

Question 1
A network security analyst has noticed a flood of Simple Mail Transfer Protocol (SMTP) traffic to internal clients. SMTP traffic should only be allowed to email servers. Which of the following commands would stop this attack? (Choose two.) 
  1. iptables -A INPUT -p tcp –dport 25 -d x.x.x.x -j ACCEPT
  2. iptables -A INPUT -p tcp –sport 25 -d x.x.x.x -j ACCEPT
  3. iptables -A INPUT -p tcp –dport 25 -j DROP
  4. iptables -A INPUT -p tcp –destination-port 21 -j DROP
  5. iptables -A FORWARD -p tcp –dport 6881:6889 -j DROP
Correct answer: AC
Question 2
A Linux system administrator found suspicious activity on host IP 192.168.10.121. This host is also establishing a connection to IP 88.143.12.123. Which of the following commands should the administrator use to capture only the traffic between the two hosts?
  1. # tcpdump -i eth0 host 88.143.12.123
  2. # tcpdump -i eth0 dst 88.143.12.123
  3. # tcpdump -i eth0 host 192.168.10.121
  4. # tcpdump -i eth0 src 88.143.12.123
Correct answer: B
Explanation:
Question 3
A system administrator identifies unusual network traffic from outside the local network. Which of the following is the BEST method for mitigating the threat?
  1. Malware scanning
  2. Port blocking
  3. Packet capturing
  4. Content filtering
Correct answer: C
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