Network Fundamentals
1. *Definition*: A network is a collection of interconnected devices that communicate with each other.
2. *Types*: Local Area Network (LAN), Wide Area Network (WAN), Metropolitan Area Network (MAN), Wireless Network (WLAN), Virtual Private Network (VPN).
3. *Network Topology*: Physical and logical arrangement of devices, including bus, star, ring, mesh, and hybrid.
Network Devices
1. *Routers*: Connect multiple networks, route traffic, and manage network congestion.
2. *Switches*: Connect devices within a network, forward data packets, and manage network traffic.
3. *Hubs*: Simple network devices that connect multiple devices, but do not manage network traffic.
4. *Modems*: Connect devices to the internet via broadband or dial-up connections.
5. *Network Interface Cards (NICs)*: Allow devices to connect to a network.
Network Protocols
1. *TCP/IP*: Suite of protocols that enable communication over the internet.
2. *HTTP*: Protocol for transferring data over the web.
3. *FTP*: Protocol for transferring files over a network.
4. *DNS*: Protocol for resolving domain names to IP addresses.
5. *DHCP*: Protocol for dynamically assigning IP addresses to devices.
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Networking world shearing
Network Security
1. *Firewalls*: Network devices that block unauthorized access to a network.
2. *Antivirus Software*: Programs that detect and remove malware from devices.
3. *Encryption*: Method of securing data by converting it into an unreadable format.
4. *Access Control*: Measures to control who can access a network and its resources.
5. *Network Monitoring*: Tools and techniques for monitoring network activity and detecting security threats.
Network Performance
1. *Bandwidth*: Measure of the amount of data that can be transferred over a network.
2. *Latency*: Measure of the time it takes for data to travel over a network.
3. *Jitter*: Measure of the variation in packet delay over a network.
4. *Packet Loss*: Measure of the number of packets lost during transmission over a network.
5. *Quality of Service (QoS)*: Measures to ensure that critical network traffic is prioritized and delivered efficiently.
These points cover the basics of computer networks, including network fundamentals, devices, protocols, security, and performance.
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