Flashcards
Network Hardware
Cards in this deck (8)
- 1What is a Switch?> Connects several devices to form a wired network
> Each node has a unique MAC address (Media Access Control)
> When data is sent on the network, it includes the sender and recipient MAC address
> The switch knows which device the MAC address relates to, so data is sent to the intended destination only - 2What is a Router?> Piece of hardware which connects networks together
> Works using IP addresses
> Inspects each IP address and determines if it belongs to the local network it is attached to
> If not, the data is sent to the connected WAN - 3What is a Wireless Access Point?> Piece of hardware that connects to a switch
> Allows WiFi devices to connect to the network
> Broadcasts an SSID (network name), so that devices know which network to join
> WAPs can create a security risk if encryption and authentication is not top priority - 4What is a NIC?> Network Interface Controller
> Provides a connection between the device and network
> Can have an RJ45 port, or radio transmitter / receiver to connect (i.e., wired or wireless)
> In computers, most NICs are directly built-in to the motherboard - 5What is a Fibre-Optic Cable?> Thin strands of glass which transmits binary data as pulses of light
> Due to the speed of light, has a very high bandwidth (upwards of 100 Tb/s)
> Do not suffer interference, meaning they are appropriate for long distance communication (including intercontinental cabling) - 6What is a Coaxial Cable?> Wired transmission media
> Insulated copper wire surrounded by a metal mesh to protect from interference
> Often used for cable TV - 7What is a Twisted-Pair Copper Cable?> Often referred to as "Ethernet cable"
> Eight wires twisted into pairs, which reduces interference from other signals and improves transmission speed
> Cables have different ratings to indicate transmission speed, e.g., Cat-5e at 1 Gbps, Cat-6 at 10Gbps - 8What are Radio Waves?> Transmission media of wireless networking, e.g., WiFi and Bluetooth
> Amplitude (strength) decreases as it moves further away from its transmitter (which is why signal strength degrades)
> Other radio signals of similar frequency can cause interference
> WAPs check for frequency channels that are least congested before starting a broadcast
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- A level Computer Science (Networks) Flashcards on Network Hardware, created by Malachy Moran-Tun on 30/11/2022.
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- Malachy Moran-Tun
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- Created by Malachy Moran-Tun · Nov 21, 2022
- Copied by Malachy Moran-Tun · Nov 30, 2022
- Copied by Malachy Moran-Tun · Nov 30, 2022
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