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Is a networking device that allows multiple computers to communicate with each other over a network by broadcasting all incoming data to all active ports.

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It lets the user who uses the hub have network connection it has 4 to 12 ports to be used.

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Networking hub-Is a hub that allows multiple computers to communicate with each other over a network.
USB hub-Is a hub that allows multiple peripherals to connect through a single USB port.

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Its cheap and simple
It can connect different media types.

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Half-duplex
Wastes bandwidth
Causes unnecessary traffic.

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Is a networking device that connects hosts by receiving incoming data packets and redirects them to their intended destination.

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When a device sends a packet to another device, it enters the switch and the switch reads its header to determine what to do with it. It matches the destination address or addresses and sends the packet out through the appropriate ports that leads to the destination devices.

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Full-duplex
Keeps a record of MAC address
Prevents bandwidth wastes
Increases network size.

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More expensive

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Is a kind of networking device that interconnects two or more networks together by dividing LAN into different segments. Commonly has a single input and single output port, thus making it a 2 port device.

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Bridge work by dividing a LAN into segments and help the hosts send and receive data specific segment where the receiver or another host belong.

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Wired bridge-Is like a bridge but needs wires or ethernet for the device to have a connection.
Wireless bridge-Is like a bridge but wireless it doesn't need any wire or ethernet to have multiple devices connected to the network.

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Reduces network traffic.
Prevent bandwidth.
Keeps a record of the MAC address

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Expensive
Slower than the hub.

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Is a network device that replicates and amplifies a received signal to an extended geographical area.

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Repeaters work by amplifying the received signal then rebroadcasts it to another area. By amplifying the signal, a repeater increases the transmission range of the original signal.

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Wi-fi repeater-Is used to extend the coverage area of your Wi-Fi network.
Network repeater-The specific characteristics of this is that whatever it receives it transmits to the other LAN segment.
Telephone repeater-Is used to amplify signals to support and carry long distance calls.
Submarine cable repeater
Radio Repeater-This is used to extend the coverage of a radio signal.

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It amplifies the signal.
It does not affect the performance of the network when its performing its task on the signal.
Repeaters can be used in different mediums for reception and transmission.
It does not increase or decrease the network traffic.

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It is not possible to connect different network architectures using repeater. For this router or gateway is needed.
The number of repeaters to be used are limited between two ends.
Repeaters do not perform filtering of the data.

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Is a networking device that allows devices to send and receive data over the internet by converting analog signal into a digital signal and vice versa.

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Modem demodulates incoming analog signals into digital signal.
Modem modulates outgoing digital signals into an analog signal.

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Cable modem-Is a modem that uses coaxial cables to provide cable tv and high-speed internet access.
DSL modem-Is a modem used to transfer digital signals over standard telephone lines.
USB modem-Is a portable modem (known as a dongle) that plugs directly into a USB port and uses a SIM-card to connect to the internet.

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High transmission speed
Supports different media types

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Vulnerable to malware and hackers
Expensive

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Is a networking device that connects computers and other devices to the internet by acting as a dispatcher that chooses the best route for the packets to travel.

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It routes or passes the internet connection to all devices connected to it by disturbing data packets to intended destination using the IP addresses of each device.

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Wired router-Are typically box-shaped devices that connect via "hard-lined" or wired connections.
Wireless router-Is a router that distributes internet connection through one more antenna.
Brouter-Is a combination of bridge and router.
It can forward data between networks(serving as a bridge)but can also route data to individual systems with a network(serving as a router).
Modem router-Is the most common nowadays. It is a router with built-in USB ports and Ethernet ports.

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Communicate across networks.
Keeps a record of IP address.
Prevent bandwidth waste.
Increases network size.

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More expensive
Security risks.