U4P3 - Network Basics

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what does IMAP, POP3, SMTP and HTTP have in common and what is each ports number

IMAP TCP 143 POP3 TCP 110 SMTP TCP 25/587 HTTP TCP 80/8080

What are network protocols?

They are simply a set of standards for devices interacting on the Internet! It's important to understand these protocols from the angle of network security. Threat actors often abuse the rules of a protocol to gain access to sensitive information.

What transport protocol is used for DNS and what's its port number

DNS TCP/UDP - 53

How many layers does the TCP/IP model have and what are they

It has 4-layers which are Application, Presentation and Session

I learned what?

Learned about essential protocols like DNS, HTTP, and email protocols Learned about SSH, SMB, and FTP protocols that are important for accessing specific resources securely

What are the transport core protocols in the TCP/IP model?

TCP and UDP are the core protocols here.

What is

TCP is a connection-oriented protocol, where a more rigorous acknowledgment between one sender and one receiver must happen before any data can be sent. This protocol also includes flow control and error recovery, and it is used when larger amounts of data need to be sent and timing is less of a concern.

Secure Shell (SSH)

is used to access a remote terminal or virtual machine (VM) over a secure connection. IT professionals and engineers use this to help configure and program a system remotely and securely. For example, accessing Github from the command line uses SSH!

The File Transfer Protocol (FTP)

is used to transfer files from one system to another. Modern implementations of FTP can include encryption as well.

What does Server Message Block (SMB) protocol allow multiple users to do?

to interact with a remote system like a file share or printing services. Multiple people can view and modify shared resources and files in a centralized server.


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