The correct answer is Router.The router is used to connect computers to the internet without wire.It is a hardware device that connects one or more networks together and links it with the Internet.In addition to this, the router is linked with the Servers.Important PointsFeatures of Router:A router is a layer 3 or network layer device.A router can be used both in LANs (Local Area Networks) and WANs (Wide Area Networks).It transfers data in the form of IP packets.In order to transmit data, it uses the IP address mentioned in the destination field of the IP packet. Additional InformationFirewall:-A firewall is a software used to maintain the security of a private network.It is used to protect internal networks and private or sensitive data. A firewall also logs information about network traffic, which can help an administrator understand and prevent attacks.Printer:-A printer is a device that accepts text and graphic output from a computer and transfers the information to paper, usually to standard size sheets of paper.A printer is an output device.VIRUS:-It stands for Vital Information Resource Under Seize.A VIRUS is a piece of code that is capable of copying itself and typically has a detrimental effect, such as corrupting the system or destroying data.