Explanation

A router is a device that connects two or more packet-switched networks or subnetworks.

It serves two primary functions:

1. Managing traffic between these networks by forwarding data packets to their intended IP addresses.
2. Allowing multiple devices to use the same Internet connection.

Explanation

• The four layers of the TCP/IP stack (also called the DoD model) are Application/Process, Host-to-Host, Internet, and Network Access.
• The Host-to-Host layer is equivalent to the Transport layer of the OSI model.

Explanation

• OSPF (Open Shortest Path First) establishes route adjacencies on point-to-point links, but does not perform the DR (Designated Router)/BDR (Backup Designated Router) election process on these links.
• This is because point-to-point links only have two routers connected, so there is no need for a DR or BDR.

Explanation

Telnet is a text-based computer protocol that allows users to remotely access and manage a computer or network device. It uses a command-line interface (CLI) to send and receive text-based commands and responses. Telnet is a client-server protocol, where the user's device acts as the client and the remote device acts as the server.

Telnet is typically used for:

• Remote access to servers, routers, and other network devices
• Command-line interface (CLI) access to network devices
• Troubleshooting and debugging network connections
• Remote execution of commands and scripts

Explanation

A user can access files from other computers on the Internet by using FTP.

FTP stands for File Transfer Protocol 

Explanation

A file manager is a software program that helps a user manage all the files on their computer

All file managers allow the user to view, edit, copy, and delete the file on their computer storage devices 

Explanation

A paintbrush is a brush used to apply paint or ink.

Java, COBOL, C++ etc. are computer languages. 

Explanation

Apple has developed a series of Macintosh operating systems.

The first versions initially had no name but came to be known as the "Macintosh System Software" in 1988, "Mac OS" in 1997 

Explanation

Bluetooth is a high-speed, low-power microwave wireless link technology, designed to connect phones, laptops, PDAs and other portable equipment together with little or no work by the user.

Explanation

• Most of the C compiler use Integrated Development Environment (IDE) to Compile, Link, Execute simple program. 
• An integrated development environment (IDE) is a software application that provides comprehensive facilities to computer programmers