10 additional network connections are needed to transition from a star to a full-mesh topology. A star topology is a network topology where each device is connected to a central device, such as a switch or a hub. A full-mesh topology is a network topology where each device is directly connected to every other device. The number of connections needed for a full-mesh topology can be calculated by the formula n(n-1)/2, where n is the number of devices. In this case, there are six devices (one core and five distribution switches), so the number of connections needed for a full-mesh topology is 6(6-1)/2 = 15. Since there are already five connections in the star topology (one from each distribution switch to the core switch), the number of additional connections needed is 15 - 5 = 10. Reference: https://www.cisco.com/c/en/us/support/docs/ip/routing-information-protocol-rip/13788-3.html

Updating the firewalls with current firmware and software is an important step to ensure all the firewalls are hardened successfully, as it can fix any known vulnerabilities or bugs and provide new features or enhancements. Enabling an implicit permit rule is not a good practice for firewall hardening, as it can allow unwanted traffic to pass through the firewall. Configuring the log settings on the firewalls to the central syslog server is a good practice for monitoring and auditing purposes, but it does not harden the firewalls themselves.
Using the same complex passwords on all firewalls is not a good practice for password security, as it can increase the risk of compromise if one firewall is breached. References: CompTIA Network+ Certification Exam Objectives Version 2.0 (Exam Number: N10-006), Domain 3.0 Network Security, Objective 3.3 Given a scenario, implement network hardening techniques.

Explanation
MTTR is directly related to how quickly a system can be repaired if any major part fails3. The management team requires that the infrastructure be capable of being repaired in less than 60 minutes, which means they have a low MTTR requirement.
MTTR stands for Mean Time To Repair and is a metric used to measure the average amount of time it takes to repair a failed component or system. In this case, the requirement is for the infrastructure to be capable of being repaired in less than 60 minutes if any major part fails, which means the MTTR should be less than 60 minutes.

IaaS is an example of on-demand scalable hardware that is typically housed in the vendor's data center. IaaS stands for Infrastructure as a Service, which is a cloud computing model that provides virtualized computing resources over the internet. IaaS allows customers to rent servers, storage, network devices, and other hardware components from a cloud service provider, rather than purchasing and maintaining them on-premise.
IaaS offers advantages such as scalability, flexibility, cost-effectiveness, and reliability. Customers can adjust their hardware resources according to their needs and pay only for what they use. Customers can also access their hardware resources from anywhere via a web browser or an API. References: [CompTIA Network+ Certification Exam Objectives], What Is Infrastructure as a Service (IaaS)? | IBM

* A network technician is planning a network scope means that the technician is defining the range of IP addresses that can be assigned to the devices on the network.
* The web server needs to be within 12.31 69.1 to 12.31.69.29 means that the web server must have an IP address that falls within this range, which is a subset of the network scope.
* A range reservation is a feature of DHCP that allows the technician to reserve a specific range of IP addresses for a certain type of device, such as a web server, and prevent other devices from using those addresses. This ensures that the web server will always have an IP address within the desired range and avoid IP conflicts with other devices.
* A range reservation would meet this requirement, as the technician can configure the DHCP server to reserve the range of 12.31 69.1 to 12.31.69.29 for the web server and assign it an IP address from that range.
* The other options are not correct because:
* Lease time is the duration for which a DHCP server assigns an IP address to a device, not a way to specify a range of IP addresses.
* DNS is a service that resolves domain names to IP addresses, not a way to define a network scope or reserve a range of IP addresses.
* Superscope is a feature of DHCP that allows the technician to combine multiple scopes into one logical scope, not a way to restrict a range of IP addresses for a specific device.
References:
* CompTIA Network+ N10-008 Certification Study Guide, Chapter 2: Network Implementations, Section
2.3: DHCP1
* Professor Messer's CompTIA N10-008 Network+ Course Notes, Page 15: DHCP2
* Professor Messer's CompTIA N10-008 Network+ Training Course, Video 2.3: DHCP3