- (Topic 3)
A network technician wants to find the shortest path from one node to every other node in the network. Which of the following algorithms will provide the FASTEST convergence time?

1. A. A static algorithm
2. B. A link-state algorithm
3. C. A distance-vector algorithm
4. D. A path-vector algorithm

Correct Answer: B
A link-state algorithm is a routing algorithm that uses information about the state of each link in the network to calculate the shortest path from one node to every other node. A link-state algorithm requires each router to maintain a complete map of the network topology and exchange link-state advertisements with its neighbors periodically or when a change occurs. A link-state algorithm uses a mathematical formula called Dijkstra’s algorithm to find the shortest path based on the link costs. A link-state algorithm provides the fastest convergence time because it can quickly detect and adapt to network changes. References: [CompTIA Network+ Certification Exam Objectives], [Link-state routing protocol - Wikipedia]

- (Topic 3)
A medical building offers patients Wi-Fi in the waiting room. Which of the following security
features would be the BEST solution to provide secure connections and keep the medical data protected?

1. A. Isolating the guest network
2. B. Securing SNMP
3. C. MAC filtering
4. D. Disabling unneeded switchports

Correct Answer: A

- (Topic 3)
A sales team at a company uses a SaaS solution primarily for videoconferencing and a CRM application that connects to a database server in the corporate data center. Which of the following VPN solutions would allow secure, remote access for sales staff to the CRM application without impacting videoconferencing traffic?

1. A. Clientless
2. B. Site-to-site
3. C. Split tunnel
4. D. Full tunnel

Correct Answer: A
A split tunnel VPN solution would allow secure, remote access for sales staff to the CRM application without impacting videoconferencing traffic. A VPN stands for virtual private network, which is a secure connection between two or more devices over a public
network, such as the internet. A VPN encrypts and authenticates the data, ensuring its confidentiality and integrity. A split tunnel VPN is a type of VPN that allows some traffic to go through the VPN tunnel, while other traffic goes directly to the internet. This can improve performance and bandwidth utilization by reducing unnecessary encryption and routing overhead. By using a split tunnel VPN, sales staff can access the CRM application that connects to a database server in the corporate data center through the VPN tunnel, while using online videoconferencing services through their local internet
connection. References: [CompTIA Network+ Certification Exam Objectives], What Is Split Tunneling? | NordVPN

- (Topic 3)
A network administrator views a network pcap and sees a packet containing the following:

Which of the following are the BEST ways for the administrator to secure this type of traffic? (Select TWO).

1. A. Migrate the network to IPv6.
2. B. Implement 802.1 X authentication
3. C. Set a private community siring
4. D. Use SNMPv3.
5. E. Incorporate SSL encryption
6. F. Utilize IPSec tunneling.

Correct Answer: CD
The packet shown in the image is an SNMP (Simple Network Management Protocol) packet, which is used to monitor and manage network devices. SNMP uses community strings to authenticate requests and responses between SNMP agents and managers. However, community strings are sent in clear text and can be easily intercepted by attackers. Therefore, one way to secure SNMP traffic is to set a private community string that is not the default or well-known value. Another way to secure SNMP traffic is to use SNMPv3, which is the latest version of the protocol that supports encryption and authentication of SNMP messages.
References: CompTIA Network+ Certification Exam Objectives Version 7.0 (N10-007), Objective 2.5: Given a scenario, use remote access methods.

- (Topic 3)
A company, which is located in a coastal town, retrofitted an office building for a new data center. The underground fiber optics were brought in and connected to the switches in the basement network MDF. A server data center was built on the fifth floor with the two rooms vertically connected by fiber optics. Which of the following types of environmental sensors is MOST needed?

1. A. Temperature sensor in the network MDF
2. B. Water sensor in the network MDF
3. C. Temperature sensor in the data center
4. D. Water sensor in the data center

Correct Answer: B
A water sensor is a type of environmental sensor that detects the presence of water or moisture in an area. A water sensor is most needed in a network main distribution frame (MDF) that is located in a basement near underground fiber-optic cables. A network MDF is a central point where all the network connections converge and where network equipment such as switches and routers are located. If water leaks into the basement and damages the fiber-optic cables or the network equipment, it can cause network outages, performance degradation, or data loss. A water sensor can alert the network administrator of any water intrusion and help prevent or minimize the damage. References: https://www.comptia.org/training/books/network-n10-008-study-guide (page 446)