# data[].attributes.body
Definition
is a hardware which receives quanta of information and sends in to the destination address.
In what topolgy is used:
Usually, routers are used in a star topology, because each workstation is connected by its own cable directly to the server.
Tree and mesh structures: interconnected networks.
Diference from hub and switch
Sends information to the larger distances. Not a local network.
How it can be used in business:
For international partnership, sent documents/data to a different countries. It can also be used as port forwarding between private Internet-connected servers.

# data[].attributes.body
Definition+What is the main purpose of modem
is a hardware device that transforms data from a digital format intended for direct communication between devices with specialized wiring to a format suitable for transmission media such as telephone lines or radio.

# data[].attributes.body
Definition
common connection point for devices in a network
In what topolgy is used
Hub is mainly used in a star topology, since each device in the network is connected to a central device called hub.
Diference from switch
1.  Network hub has no routing tables or intelligence on where to send information and it broadcasts all network data across each connection.
2. A hub works on the physical layer (Layer 1) of OSI model while Switch works on the data link layer (Layer 2).
3. Hub connects multiple Ethernet devices together as a single segment, while switch can join multiple computers within one LAN. A hub extends the network by providing more ports. While an Ethernet switch divides the network into smaller, less congested divisions
3.
How it can be used in business
Hubs are generally easy to install and maintain, making these devices a good option for home networking businesses. A hub is also easily configured for small business branch office networking.

References:

http://www.fiber-optic-solutions.com/buy-ethernet-switch-hub.html

1. https://www.computerhope.com/jargon/h/hub.htm

https://www.conceptdraw.com/examples/real-life-example-of-star-topology

# data[].attributes.body
Definition
A data link layer network hardware that uses the packet  switching to send messages among the network/network software
In what topolgy is used
As long as the switches have many ports, it facilitates the connection in a star (also extended star) topology (many computers may connect at the same time without the network collisions)
Diference from hub
- When Hub sends the message to every computer connected to it, intelligent switch supports all unicast (one-to-one) multicast (one-to-many) and broadcast (one-to-all) communications
- Hub has 4/12 ports, switch owns 24/48 ports
- Hub operates at physical level of OSI model, switch is layer 2 network hardware
How it can be used in business
It can be used to connect the local computers that are, for example, in one office, by connecting with Ethernet cables. Following the scope in which it can be used, the vulnerability of switch can be mentioned: it can not connect to the external networking systems (not large scale networking hardware)
References:
*https://www.tutorialspoint.com/what-are-hub-and-switch-in-computer-network
*https://www.tutorialspoint.com/what-are-switches-in-computer-network

# data[].attributes.body
Definition
A repeater is an electronic device that receives a signal and retransmits it.
In what topolgy is used
Bus, ring,
What is the main purpose of repeater
Repeater is supposed to regenerate the signal over the same network before the signal becomes too weak or corrupted so as to extend the length to which the signal can be transmitted over the same network. They do not amplify the signal.
How it can be used in business
It can be used in radio-communication sphere or in a small companies with a few computers.

# data[].attributes.body
Definition
A network bridge is a computer networking device that creates a single aggregate network from multiple communication networks or network segments or shortly bridge operates at data link layer
In what topology is used
Bus, ring
What is the main purpose of bridge
A bridge is a repeater, with add on the functionality of filtering content by reading the MAC addresses of source and destination. It is also used for interconnecting two LANs working on the same protocol. It has a single input and single output port, thus making it a 2 port device.
How it can be used in business
It can connect all devices in office by this bridge, because it will be more faster and effectively.

# data[].attributes.body
This is how switch looks like in real life
*https://3.bp.blogspot.com/-glKebh6a-OM/VlMShSm2teI/AAAAAAAAJxs/0K4KFxrJjtM/s1600/sitecom_19_network_switch_6port.jpg

# data[].attributes.body
Definition
In what topolgy is used
What is the main purpose of terminator
How it can be used in business

# data[].attributes.body
Definition
A terminator is an energy sink (usually a resistor) at the end of a long line whose resistance is equal to the wave resistance of that line.
In what topology is used
bus network
What is the main prupose of terminator
Terminators are used on all lines connecting the signal transmitter and receiver when the signal reflected from the end of the line significantly affects the operation of the communication line.
How it can be used in business
Since terminators are the parts of a bus topology, which are good for installing, we can conclude that they contribute to the convenience of a bus topology by preventing signals bouncing back and forth & creating echo.
References

https://dic.academic.ru/dic.nsf/ruwiki/15446

# data[].attributes.body
Definition
Network card is an electronic device that connects a computer to a computer network.
Topology
Topolgy is a LAN. (mostly star)
Main purpose of repeater
provides the hardware interface between a computer and a network
How it can be used in busimess
It can be installed on the computers in the office and connect them to the private network, so the data will be shared easier, faster and safer while working on some business project.