When working with storage, different units of measurement are used to express the amount of data. The most common units are bytes (B), kilobytes (KB), megabytes (MB), gigabytes (GB), terabytes (TB), and petabytes (PB). Each unit is equal to 1,000 of the previous unit, except for bytes, which are the smallest unit. Therefore, 1,000,000MB can also be notated as 1,000GB or 1TB. The other options are incorrect because they are either too large or too small to represent 1,000,000MB. For example, 0.01PB is equal to 10,000GB or 10TB, which is much larger than 1,000,000MB. Similarly, 100GB is equal to 100,000MB or 0.1TB, which is much smaller than 1,000,000MB. And 10,000,000KB is equal to 10,000MB or 0.01TB, which is also much smaller than 1,000,000MB. Reference:
CompTIA IT Fundamentals FC0-U61 Certification Study Guide, page 71, section 1.6: "A terabyte (TB) is 1,000 gigabytes." CompTIA ITF+ Practice Test, question 230: "1TB is the correct answer."

Explanation
A function is best used for enabling programs to define variables to hold different values. A function is a named block of code that performs a specific task or operation. A function can have one or more parameters, which are variables that hold the input values for the function. A function can also have a return value, which is the output value that the function produces. A function can be called or invoked by other parts of the program to execute the code inside the function. A function can help programs to avoid repeating the same code, improve readability and modularity, and reduce errors and complexity. References : The Official CompTIA IT Fundamentals (ITF+) Study Guide (FC0-U61), page 133.

To block application traffic on specific ports from entering a local area network (LAN), the most effective device is a firewall. A firewall serves as a security gatekeeper between your internal network and the outside world. It monitors incoming and outgoing network traffic based on predetermined security rules and can block specific traffic deemed unsafe or unauthorized. In this scenario, if the administrator wishes to prevent certain application traffic from entering the network, configuring the firewall to deny traffic coming through those specific ports would be an effective solution. This configuration helps in protecting the network against potential intrusions or harmful traffic that could exploit open ports.