Basics of computer networking
Network topology can have a network arranged in many different layouts that include: star, mesh, point to point, daisy chain, tree, hybrid, ring.
What is the difference between well known ports, registered ports, and ephemeral ports?
Intro to basic networking terminology
The most widely used network reference model, which were developed to allow products from different manufacturers to interoperate on a network, is the TCP/IP model (which was developed by the Department of Defense)
Why would the DOD need to create a network reference model when there was already one widely used?
Layers of OSI
The open system interconnection (OSI) model is a 7 layer architecture that works to transmit data from one device to another device across the globe.
Was the OSI model to complicated to use? Is that why they created the TCP?IP model?
TCP/IP
The transmission control protocol/internet protocol is a 4 layer architecture model and was created by the DOD and is a concise version of the OSI model.
How does the OSI model compare to the TCP/IP model (architecture wise)?
Well-known ports are being used for many services that we regularly use such as HTTPS, HTTP, SFTP, or FTP. It has a range from 0-1023. Registered ports range is from 1024 to 49151. Registered ports are being used by the applications that connects to the internet using TCP or UPD. OSI model is only connection-oriented whereas the TCP/IP is both connection-oriented and connectionless. Connection-oriented connection check for the message is delivered or not and if there are any error then it will report it back. Connectionless protocol does not guarantees a message delivery.