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Option 4 : SMPS

The correct answer is "SMPS".

1) Router:

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

2) Hub:

  • A hub is a common connection point, also known as a network hub, which is used for connection of devices in a network. 

3) SMTP

  • SMTP (Simple Mail Transfer Protocol) is an application layer protocol and used to send emails over the internet. SMTP is a state-full protocol.

4) SMPS:

  • SMPS (Switched-mode power supply) converts High voltage AC to low voltage DC.
  • SMPS supplies Power to various system components of the computer, such as the motherboard and device drivers.
  • The main parts of SMPS are Power Connectors, and Power Supply Power connectors provide DC voltage to all system components, and Power Supply Fan is used to keep SMPS fresh.

5) Switch:

  • A network switch connects devices (such as computers, printers, wireless access points) in a network to each other, and allows them to 'talk' by exchanging data packets.
  • Switches can be hardware devices that manage physical networks, as well as software-based virtual devices.
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