Authentic LPI Certification Exam 202-450 Questions Answers

When using a web server certificate that is signed by an intermediate certification authority, the web server must also send the intermediate certificate to the client browser, so that the browser can verify the whole chain of trust. To do this, the web server must have both the web server certificate and the intermediate certificate in one file, which is specified in the SSLCertificateFile directive of Apache HTTPD. This way, the web server can send both certificates to the client in one response. The order of the certificates in the file is important: the web server certificate must come first, followed by the intermediate certificate. The file can be created by concatenating the two certificates with a text editor or the cat command. References:

• LPIC-2 202 exam objectives, topic 218.1: Implementing HTTPS
• Apache HTTPD documentation, section: SSLCertificateFile Directive
• How to install an Intermediate SSL Certificate on Apache

 After running ssh-keygen and accepting the default values, the following files are changed or created in the user’s home directory under the .ssh subdirectory:

• ~/.ssh/id_rsa: This file contains the private key of the user, which is used for authenticating the user to a remote server. The private key is encrypted with a passphrase, which can be left empty for convenience, but this is not recommended for security reasons. The private key should be kept secret and protected by the user, and should not be copied or shared with anyone else.
• ~/.ssh/id_rsa.pub: This file contains the public key of the user, which is used for verifying the user’s identity by the remote server. The public key can be copied and distributed to any server that the user wants to access via SSH. The public key can also be appended to the ~/.ssh/authorized_keys file on the remote server, which allows the user to log in without entering a password.

The other options are not correct. There is no file called ~/.ssh/id_rsa.key, ~/.ssh/id_rsa.prv, or ~/.ssh/id_rsa.crt created by ssh-keygen. The .key, .prv, and .crt extensions are not used by ssh-keygen, and they may be confused with other types of keys or certificates.

References:

• How to Use ssh-keygen to Generate a New SSH Key?
• How To Set Up SSH Keys
• SSH Essentials: Working with SSH Servers, Clients, and Keys

The word missing from the excerpt of a named.conf file is “acl”. This is because the excerpt is defining an access control list (ACL) for the DNS server. The ACL is used to restrict access to the DNS server and is defined in the named.conf file. The syntax for defining an ACL is:

acl name { address_match_list; };

where name is the name of the ACL, and address_match_list is a list of IP addresses, networks, or keywords that match the clients that are allowed or denied access.References:

• LPIC-2 Overview
• LPIC-2 202-450
• BIND 9 Administrator Reference Manual