📚 Session, Presentation, Application Layer

📚 DHCP

Dynamic Host Configuration Protocol. Listening on 67 port. Sending from 68. Mechanism DHCP Discover (Broadcast) C-> S [new PC] 🧸 “I need an IP, I am new here.

📚 DNS

Domain Name System. Translates IPs to domain names like 192.168.1.1 to router.lan and visa versa.

📚 IRC

IRC stands for Internet Relay Chat. Used for instant messaging. Usually sits at port 6667. On Linux can be installed and run with sudo invoke-rc.

📚 Kerberos

Structure The Flow - Wanna talk - Ok. Let’s talk. Here is my public key. Here are the protocols that I support.

📚 SMB

Over TCP - 445 port Over NetBIOS API UDP - ports 137, 138 TCP - ports 137, 139 NBF (legacy) Powershell command + win reg for SMB 1,2,3.

📚 SSL and TLS

This article explains how SSL and its successsor work. Intro SSL makes use of assymmetric encryption for verification and symmetric encryption for data exchanging.