202-450 Exam Dumps : LPIC-2 - Exam 202 (part 2 of 2), version 4.5

 The FTP names that are recognized as anonymous users in vsftpd when the option anonymous_enable is set to yes in the configuration file are anonymous and ftp. These are the default names that vsftpd accepts as valid anonymous users, and they can be used interchangeably. The anonymous user does not need to enter a password, but can optionally enter an email address as a password. The anonymous user has limited permissions and can only access the directory specified by the anon_root directive, which is usually /var/ftp or /srv/ftp. The anonymous user can download files from the server, but cannot upload or modify files, unless the anon_upload_enable and anon_mkdir_write_enable directives are also set to yes.

The other options are not recognized as anonymous users in vsftpd. Option C is incorrect, because vsftpd will reject any username that does not belong to an existing user or an anonymous user. Option D is incorrect, because nobody is a system user that has no permissions and is not related to FTP. Option E is incorrect, because guest is not a valid FTP name, unless the guest_enable directive is set to yes, which will make all non-anonymous users log in as the guest_username, which is usually ftp.

References:

• vsftpd.conf - config file for vsftpd
• How To Set Up vsftpd for Anonymous Downloads on Ubuntu 16.04
• How to Configure vsftpd FTP Server on CentOS 8

The commands nc and telnet can be used to connect and interact with remote TCP network services. nc stands for netcat, a utility that can read and write data across network connections using TCP or UDP protocols. telnet is a client-server protocol that allows a user to communicate with a remote host using a virtual terminal. Both commands can be used to test the connectivity and functionality of network services such as web servers, mail servers, FTP servers, etc. by specifying the host name or IP address and the port number of the service. References:

• LPIC-2 exam 201 topics, section 205.1, “Use and configure network monitoring tools”.
• LPIC-2 exam 202 topics, section 208.1, “Implementing a web server”.
• Linux Essentials 010 exam objectives, section 4.3, “Basic network configuration and troubleshooting”.

 In the ISC DHCPD server configuration, to always assign the IP address 192.168.1.2 to a host with the MAC address 08:00:2b:4c:59:23, you need to create a host declaration within your dhcpd.conf file. Option A provides the correct syntax for this configuration:

This configuration ensures that whenever a DHCP request is received from the MAC address specified, the ISC DHCPD server will always assign it the IP address 192.168.1.2.

References:

• ISC DHCP 4.1 Manual Pages - dhcpd.conf: The official documentation of ISC DHCPD on how to configure the dhcpd.conf file, which includes the host declaration syntax and examples.
• isc-dhcp-server: Using option dhcp-client-identifier in host declaration to identify a client: A question and answer from Server Fault on how to use the option dhcp-client-identifier in a host declaration, which also shows the use of the hardware-ethernet and fixed-address parameters.