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4 Cards in this Set
- Front
- Back
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Network hardware
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Network adapter: Allows a computer to connect to the network. Ethernet cable: Links different devices on the network together. Router: Joins different networks together, for example your home network and the internet. Switch: Connects devices together, sends any data it receives to the device it is meant for. Hub: Connects devices together, sends any data it receives to all the devices connected to it. Wireless access point: Provides wireless access to a wired network.
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Packets |
Before being sent over a network data is split into small segments called packets.
This makes data transmission more reliable.
Each packet has a header which includes important information like it’s destination, it’s position in the original message and where it was sent from.
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Network addressing
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IP address: When a device joins a network it is given a unique IP address so that data can be sent to the correct device. Devices on different networks can have the same IP address.
MAC address: Every network adapter is given a unique MAC address when it is created. The device is the only one in the world with that MAC address.
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Protocol |
A protocol is a set of rules which governs the transmission of data.
It’s like the highway code but for data transmission.
Without protocols packets would keep colliding and getting lost.
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