# Networking ###### tags: `networking` [TOC] ## Identifying Devices on the network ### MAC Format  ### MAC spoofing  ## Packet And Form ###  ## Port  ## Firewall (layer3 ,layer 4) ### Manage  #### Category #### Statefull(dynamic) check -> connection()  #### Stateless(stateless)   ## VPN  ### Benefit  ### category  ## OSI 7 layer ### Application  - Domain resolution systems - GUI - data receive/send (user) #### HTTP/HTTPS  ### Presentation  ### Session  - Session - Packet fragment ### Transport  ### Network  ### Data-link 
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