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Exam Code: CBAF-001Exam Name: Certified Business Analyst (CBA) - Foundation
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Exam Code: CEH-001Exam Name: Certified Ethical Hacker (CEH)
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NO.1 Rebecca has noted multiple entries in her logs about users attempting to connect on ports
that are either not opened or ports that are not for public usage. How can she restrict this type of
abuse by limiting access to only specific IP addresses that are trusted by using one of the built-in
Linux Operating System tools?
A. Configure rules using ipchains.
B. Configure and enable portsentry on his server.
C. Install an intrusion detection system on her computer such as Snort.
D. Ensure all files have at least a 755 or more restrictive permissions.
Answer: A
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Explanation:
ipchains is a free software based firewall for Linux. It is a rewrite of Linux's previous IPv4 firewalling
code, ipfwadm. In Linux 2.2, ipchains is required to administer the IP packet filters. ipchains was
written because the older IPv4 firewall code used in Linux
2.0 did not work with IP fragments and didn't allow for specification of protocols other than TCP ,
UDP , and ICMP .
NO.2 Under what conditions does a secondary name server request a zone transfer from a primary
name server?
A. When the TTL falls to zero
B. When a primary SOA is higher that a secondary SOA
C. When a secondary SOA is higher that a primary SOA
D. When a primary name server has had its service restarted
E. When a secondary name server has had its service restarted
Answer: B