* NetFlow is a protocol that collects and analyzes network traffic data, such as source and destination IP addresses, ports, protocols, bytes, packets, and flows12.
* NetFlow data can help identify the volume, type, and direction of network traffic, as well as the applications and hosts that are generating or consuming the most bandwidth12.
* By collecting NetFlow data from the router, the network administrator can provide evidence to confirm that the recent network outages were caused by increased traffic from a specific application or host12.
* Generating a network baseline report, exporting the firewall traffic logs, or plotting interface statistics for dropped packets may also provide some useful information, but they are not as specific or comprehensive as NetFlow data12. References:
* 1: CompTIA Network+ N10-008 Exam Cram, 6th Edition, Chapter 5: Network Traffic Analysis, p.
203-204
* 2: CompTIA Network+ N10-008 Cert Guide, 1st Edition, Chapter 9: Network Monitoring and Performance Optimization, p. 409-410

A short circuit is a condition where two conductors in a circuit are connected unintentionally, creating a low resistance path for the current. This causes the voltage to drop and the current to increase, which can damage the circuit or cause a fire. A multimeter can measure the resistance or impedance of a circuit, and if it shows extremely low values, it indicates a short circuit.

The default credentials are the username and password that come with a device or service when it is first installed or configured. They are often easy to guess or find online, which makes them vulnerable to unauthorized access or attacks. The default credentials should be changed to something unique and strong as soon as possible to avoid this situation. If the default credentials were not changed, someone could have accessed the SOHO router and changed the WiFi settings without the employees' knowledge. Reference: https://www.comptia.org/blog/network-security-basics-6-easy-ways-to-protect-your-network

TCP port 445 is used by the Windows OS for file sharing. It is also known as SMB (Server Message Block) or CIFS (Common Internet File System) and allows users to access files, printers, and other shared resources on a network. Reference: https://docs.microsoft.com/en-us/windows-server/storage/file-server/troubleshoot/detect-enable-and-disable-smbv1-v2-v3

The DHCP server is not available is the most likely cause of the issue where a new computer is unable to ping the default gateway. DHCP stands for Dynamic Host Configuration Protocol, which is a network protocol that automatically assigns IP addresses and other configuration parameters to clients on a network. The default gateway is the IP address of the router or device that connects a local network to other networks, such as the internet. Pinging is a network utility that tests the connectivity and reachability between two devices by sending and receiving echo packets. If the DHCP server is not available, the new computer will not be able to obtain an IP address or other configuration parameters, such as the default gateway, from the DHCP server.
This will prevent the new computer from communicating with other devices on the network or the internet, resulting in ping failure. References: [CompTIA Network+ Certification Exam Objectives], What Is DHCP? | How DHCP Works | SolarWinds MSP