Updated Nov-2022 Official licence for 202-450 Certified by 202-450 Dumps PDF
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What Are Topics Scrutinized by 202-450 Exam?
The applicants who are taking this test should know the concepts of the specific domains included in the main validation, which are covered below:
- Network Client Management;
- Email Services.
- Domain Name Server;
The first area focuses on web services, where the candidate must know how to install and configure a web server. It also includes monitoring server performance and load, setting up client user authentication, and restricting client user access. Here, you will also learn about the configuration of Apache for HTTPS, which involves discerning the security issues in SSL, the awareness of problems with virtual hosting and SSL configuration tools, files, and utilities. Moreover, the candidate should be able to implement a proxy server containing access policies, resource pages, and user authentication. While learning about proxy, you should also know about reverse proxy and the implementation of Nginx as a web server. The knowledge of Nginx, a basic web server, and reverse pay is also essential for this exam.
The second portion covers file sharing. In particular, it is focused on the information about the Samba server and its configuration. Additionally, you should be able to build a Linux client to use the Samba server and troubleshoot the installation. Moreover, the candidate must know how to export the filesystem by utilizing the NFS. To put it simply, this subtopic revolves around NFS access restriction, growing an NFS filesystem, and its security.
The third objective emphasizes network client management. It spins around DHCP configuration that is about setting default according to client options, maintaining the DHCP server, and adding static and BOOTP hosts. Besides, you will also learn about performing queries and updates to the LDAP server. You should also know how to add the items and the managing users to the LDAP server. Furthermore, you should keep in mind the OpenLDAP server, access controls, and LDIF formats. The knowledge of PAM support authentication by utilizing several methods and SSSD functionality is also included in the official exam.
The fourth scope is the domain name server. It tests the knowledge of candidates about the DNS server configuration, securing DNS servers, and maintaining the DNS zones. The candidate should also be able to manage a running server and configure its logging. Here, you will also learn about setting values for records, adding zones to DNS, and adding hosts in the zone. Moreover, the candidate should organize a DNS server to run in chroot jail and the protected exchange of data between the DNS servers.
The fifth topic discusses system security. It explains the knowledge of configuring the router that includes configuring port redirection, averting attacks, and managing filter rules. The candidate's knowledge about securing FTP servers, protecting the shell, performing the security tasks, and configuring OpenVPN will as well be assessed in 202-450. In all, these subtopics confer about precautions that are required when anonymous uploads are allowed for user access, forwarding application protocol over SSH, and handling the SSH login. Finally, the candidate should have the ability to configure and run interruption detection systems and implement bug fixes along with security patches.
The sixth objective talks about email services. The candidate should have skills to manage an email server along with email quotas, virtual email domains, and email aliases. You will also learn about handling email delivery that includes applying client email management software and monitoring incoming emails of users. Also, you must know about managing remote email delivery that involves installing and configuring IMAP and POP daemons.
NEW QUESTION 32
To allow X connections to be forwarded from or through an SSH server, what configuration keyword must be set to yesin the sshdconfiguration file?
- A. XllForwarding
- B. AllowForwarding
- C. XllForwardingAllow
- D. ForwardingAllow
Answer: A
Explanation:
Explanation/Reference:
Reference: https://help.ubuntu.com/community/SSH/OpenSSH/Configuring
NEW QUESTION 33
What is the standard port used by OpenVPN?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION 34
Which statements about the Alias and Redirect directives in Apache HTTPD's configuration file are true?
(Choose two.)
- A. Redirect works with regular expressions
- B. Alias is not a valid configuration directive
- C. Alias can only reference files under DocumentRoot
- D. Alias is handled on the server side
- E. Redirect is handled on the client side
Answer: D,E
NEW QUESTION 35
Performing a DNS lookup with dig results in this answer:
- A. There is no . after linuserv in the PTR record in the forward lookup zone file
- B. The . in the NS definition in the reverse lookup zone has to be removed
- C. There is no . after linuserv.example.net in the PTR record in the forward lookup zone file
- D. There is no . after linuserv.example.net in the PTR record in the reverse lookup zone file
Answer: D
NEW QUESTION 36
Which Apache HTTPD configuration directive is used to specify the method of authentication, e.g. None or Basic?
- A. AllowedAuthUser
- B. AuthUser
- C. AuthType
- D. AllowAuth
Answer: C
NEW QUESTION 37
CORRECT TEXT
What command creates a SSH key pair? (Specify ONLY the command without any path or parameters)
Answer:
Explanation:
ssh-keygen
NEW QUESTION 38
What is the name of the root element of the LDAP tree holding the configuration of an OpenLDAP server that is using directory based configuration?
(Specify ONLY the element's name without any additional information.)
Answer:
Explanation:
slapd
NEW QUESTION 39
On a Linux router, packet forwarding for IPv4 has been enabled. After a reboot, the machine no longer forwards IP packets from other hosts. The command:
echo 1 > /proc/sys/net/ipv4/ip_forward
temporarily resolves this issue.
Which one of the following options is the best way to ensure this setting is saved across system restarts?
- A. In /etc/sysct1.conf change net.ipv4.ip_forward to 1
- B. Add echo 1 > /proc/sys/net/ipv4/ip_forward to the root user login script
- C. In /etc/rc.local add net.ipv4.ip_forward = 1
- D. Add echo 1 > /proc/sys/net/ipv4/ip_forward to any user login script
- E. In /etc/sysconfig/iptables-config add ipv4.ip_forward = 1
Answer: A
NEW QUESTION 40
Select the Samba option below that should be used if the main intention is to setup a guest printer service?
- A. security = cups
- B. security = pam
- C. security = ldap
- D. security = share
- E. security = printing
Answer: D
NEW QUESTION 41
Which configuration parameter on a Postfix server modifies only the sender address and not the recipient address?
- A. alias_rewrite_maps
- B. alias_maps
- C. sender_canonical_maps
- D. sender_rewrite_maps
Answer: C
NEW QUESTION 42
Which keyword is used in the Squid configuration to define networks and times used to limit access to the service?
- A. http_allow
- B. acl
- C. allow
- D. permit
Answer: B
Explanation:
Explanation/Reference: https://www.tecmint.com/configure-squid-server-in-linux/
NEW QUESTION 43
To allow X connections to be forwarded from or through an SSH server, what configuration keyword must be set to yes in the sshd configuration file?
- A. XllForwarding
- B. AllowForwarding
- C. XllForwardingAllow
- D. ForwardingAllow
Answer: A
NEW QUESTION 44
Using its standard configuration, how does fail2ban block offending SSH clients?
- A. By creating and maintaining netfilter rules.
- B. By modifying and adjusting the SSHD configuration.
- C. By modifying and adjusting the TCP Wrapper configuration for SSHD.
- D. By rejecting connections due to its role as a proxy in front of SSHD.
- E. By creating null routes that drop any answer packets sent to the client.
Answer: B
Explanation:
Explanation/Reference: https://www.digitalocean.com/community/tutorials/how-to-protect-ssh-with-fail2ban-on-centos-7
NEW QUESTION 45
Which option within a Nginx server configuration section defines the file system path from which the content of the server is retrieved?
- A. root
- B. htdocs
- C. DocumentRoot
- D. base_dir
- E. location
Answer: A
Explanation:
Explanation/Reference: http://nginx.org/en/docs/beginners_guide.html
NEW QUESTION 46
The program vsftpd, running in a chroot jail, gives the following error:
Which of the following actions would fix the error?
- A. Copy the required library to the appropriate libdirectory in the chroot jail
- B. Run the program using the command chrootand the option--static_libs
- C. The file /etc/ld.so.confin the root filesystem must contain the path to the appropriate lib directory in the chroot jail
- D. Create a symbolic link that points to the required library outside the chroot jail
Answer: A
NEW QUESTION 47
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