- (Topic 3)
Which of the following compromises internet-connected devices and makes them vulnerable to becoming part of a botnet? (Select TWO)

Correct Answer:BF

- (Topic 3)
A help desk technician discovers the following note while reviewing tickets in a customer's account:

Which of the following describes what the technician was documenting with this note?

Correct Answer:D
The technician was identifying the problem by gathering information with this note. This is the first step of the troubleshooting methodology, which is a systematic process of finding and resolving issues in a network or system. By gathering information, the technician can understand the symptoms, scope, and impact of the problem, as well as collect relevant data from various sources, such as users, logs, tools, or documentation. The note shows that the technician was asking questions to the user, checking the network status and configuration, and reviewing previous tickets to gather information about the
problem. References: [CompTIA Network+ Certification Exam Objectives], Troubleshooting Methodology - CompTIA Network+ N10-007 - 1.4 | Professor Messer IT Certification
Training Courses

- (Topic 3)
Which of the following is required for hosts to receive DHCP addresses from a server that is located on a different subnet?

Correct Answer:D
A DHCP relay is a network device that forwards DHCP requests from clients on one subnet to a DHCP server on another subnet. This allows the DHCP server to assign IP addresses and other network configuration parameters to clients across different subnets. A DHCP scope is a range of IP addresses that a DHCP server can assign to clients. A DHCP snooping is a security feature that filters and validates DHCP messages on a switch. A DHCP reservation is a way to assign a specific IP address to a specific client
based on its MAC address. References: Part 2 of the current page talks about DHCP relay and its functions. You can also find more information about DHCP relay on [this page].

- (Topic 3)
A new global ISP needs to connect from central offices in North America to the United Kingdom. Which of the following would be the BEST cabling solution for this project?

Correct Answer:A
For a new global ISP to connect from central offices in North America to the United Kingdom, the best cabling solution would be single-mode fiber optic cable. Single- mode fiber optic cable is a type of cable that is used to transmit data over long distances using light signals. It is typically used in long-haul communication networks, such as those that connect different countries or continents.

- (Topic 3)
Which of the following should be used to associate an IPv6 address with a domain name?

Correct Answer:A
An AAAA record is a type of DNS record that maps a domain name to an IPv6 address. It is similar to an A record, which maps a domain name to an IPv4 address, but it uses a 128-bit address instead of a 32-bit one. An AAAA record allows a domain name to be resolved by both IPv4 and IPv6 clients, and it is necessary for accessing websites and services that use IPv6.

- (Topic 2)
A network administrator is configuring a database server and would like to ensure the database engine is listening on a certain port. Which of the following commands should the administrator use to accomplish this goal?

Correct Answer:B
netstat -a is a command that displays information about active TCP connections and listening ports on a system. A network administrator can use netstat -a to check if the database engine is listening on a certain port, as well as verify if there are any connections established to or from that port. References: https://www.comptia.org/blog/what-is-netstat