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Computer 1.5 (Network Protocols (A protocol is an agreed way of…
Computer 1.5
Network Protocols
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Transmission Control Protocol is the other part of the Internet protocol suite which deals with the order of the transferred data as well as controlling traffic on the internet. Opens the link between nodes
IP or the Internet Protocol and is part of the Internet protocol suite for relaying data packets through different networks. Finds routes
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IMAP
Is about receiving messages, however it saves a temporary copy of the message onto the node, stores the message on sever and synchronises across devices
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Ethernet
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Medium - Type of cable, CAT 5 or fibre optic
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WiFi
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Separated into 14 channels, which overlap. Similar channels can interfere such as 1 and 2
Packet Switching
The email is split into equal sizes of data packets and sent across the internet in this case. Each package takes its own route to allow for the most efficient use of the bandwidth; finding the best path for itself, going from network to network.
Each packet has: the address of the sender, destination address, packet number, packet reassembling information and a check sum for error detection.
When a packet is received, a confirmation message is sent back to tell the computer to stop trying to send the message
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Topologies
Star
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Disadvantages
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If hub/switch goes down, so does the network
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Mesh
Is where all the nodes are connected to each other or most of them. Usually the node they exchange the most data
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Tethering
Tethering allows a phone with data access to setup a Wi-Fi hotspot for devices that can only use Wi-Fi. It has a name and password and they can gain access.
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