IT Fundamentals FC0-U61 Updated Exam

A VPN (Virtual Private Network) connection is a secure way of transmitting data over the internet by creating an encrypted tunnel between the sender and the receiver. This protects data in transit from being intercepted, modified, or stolen by unauthorized parties. VPNs can also mask the identity and location of the users, adding another layer of privacy and security. Backup tapes, encrypted flash drives, and FTP (File Transfer Protocol) are methods of storing or transferring data, but they do not protect data in transit as effectively as VPNs. References:

Chapter 35 Explain the Basics of Networking - CompTIA IT Fundamentals+ FC0-U61 Cert Guide

CompTIA IT Fundamentals+ Certification Exam Test Questions With Answers …

CompTIA IT Fundamentals+ (ITF+) Study Guide: Exam FC0-U61

SQL (Structured Query Language) databases use primary and foreign keys to enable relationships between tables. A SQL database is a type of relational database that organizes data into tables that are related to each other by common fields or attributes. A primary key is a field or attribute that uniquely identifies each record in a table. A foreign key is a field or attribute that refers to the primary key of another table. Primary and foreign keys enable relationships between tables by establishing links or associations between records that share common values. Rows, fields, and schemas are not concepts that are enabled by primary and foreign keys in SQL databases. A row is a horizontal arrangement of fields or attributes that store information about a specific record or entity in a table. A field is a vertical arrangement of fields or attributes that store the same type of information for different records in a table. A schema is a structure or design that defines how data is organized and stored in a database. References: CompTIA IT Fundamentals+ Study Guide: Exam FC0-U61, Second Edition, Chapter 5: Database Fundamentals, page 194.

 RJ11 is a type of connector that is used for telephone lines. RJ11 has four copper wires that carry analog voice signals. RJ11 is smaller than RJ45, which is used for Ethernet cables. RJ11 is also different from VGA and USB, which are used for video and data transmission respectively. References: The Official CompTIA IT Fundamentals (ITF+) Student Guide (Exam FC0-U61), Chapter 4, Section 4.2, Page 166.