Computer Networks

Study Notes

A network is a group of devices connected together to share data and resources.
Examples of devices that can be connected to a network include computers, printers, and televisions.
When devices are connected, they can share data, such as sending a print job to a printer or sending an email.

Wired connections: devices are connected using cables, such as connecting a computer to a router.
Wireless connections: devices are connected without using cables, such as using a wireless access point (WAP) or Wi-Fi.

A protocol is a set of rules and guidelines that govern how data is transmitted and received over a network.
Examples of protocols include Ethernet, TCP/IP, HTTP, and SMTP.
Devices on a network must agree on the protocol to use in order to communicate with each other.

Routers: devices that connect multiple networks together and route traffic between them.
Switches: devices that connect multiple devices within a network and route traffic between them.
Access points: devices that allow wireless devices to connect to a network.

SOHO (Small Office/Home Office) network: a small network that connects a few devices, typically used in a home or small office.
LAN (Local Area Network): a network that connects devices in a limited geographical area, such as a building or campus.
WAN (Wide Area Network): a network that connects devices over a larger geographical area, such as a city or country.
Internet: a global network of interconnected computers and servers that use the Internet Protocol (IP) to communicate with each other.

Networks can vary greatly in size, from a small home network to a large enterprise network that spans multiple countries.
Networks can be connected to each other to form larger networks, such as a WAN that connects multiple LANs.

A network topology refers to the physical and logical arrangement of devices and connections within a network.
Examples of network topologies include bus, star, and ring topologies.

A network architecture refers to the design and structure of a network, including the relationships between devices and the protocols used to communicate between them.
Examples of network architectures include client-server and peer-to-peer architectures.

A network is a group of devices connected together to share data and resources.
Examples of devices that can be connected to a network include computers, printers, and televisions.
Devices on a network can share data, such as sending a print job to a printer or sending an email.

Wired connections use cables to connect devices, such as connecting a computer to a router.
Wireless connections use wireless access points (WAP) or Wi-Fi to connect devices without cables.

A protocol is a set of rules and guidelines that govern how data is transmitted and received over a network.
Examples of protocols include Ethernet, TCP/IP, HTTP, and SMTP.
Devices on a network must agree on the protocol to use in order to communicate with each other.

Routers connect multiple networks together and route traffic between them.
Switches connect multiple devices within a network and route traffic between them.
Access points allow wireless devices to connect to a network.

SOHO (Small Office/Home Office) networks connect a few devices, typically used in a home or small office.
LAN (Local Area Network) connects devices in a limited geographical area, such as a building or campus.
WAN (Wide Area Network) connects devices over a larger geographical area, such as a city or country.
The Internet is a global network of interconnected computers and servers that use the Internet Protocol (IP) to communicate with each other.

Networks can vary greatly in size, from a small home network to a large enterprise network that spans multiple countries.
Networks can be connected to each other to form larger networks, such as a WAN that connects multiple LANs.

A network topology refers to the physical and logical arrangement of devices and connections within a network.
Examples of network topologies include bus, star, and ring topologies.

A network architecture refers to the design and structure of a network, including the relationships between devices and the protocols used to communicate between them.
Examples of network architectures include client-server and peer-to-peer architectures.