Can you please list the advantages and disadvantages of the layered approach to protocols? How can I define the...
layered approach protocol?
A layered approach to protocols can be seen in models like OSI and TCP/IP. The OSI model defines networking into a seven-layer process. Within the OSI model, the data is passed down from layer-to-layer. It begins at the application layer and ends at the physical layer. While the OSI model was great in theory what has been implemented in its place is TCP/IP. The DoD TCP/IP is a four layer model what both have in common is the ability to layer security. As an example, at OSI Layer 2 tunneling and VPN protocols can be used to protect data. Security controls like L2TP, WEP, and WPA are available. OSI Layer 3 is the home of IPSec. Even at the application layer security can be added by means of protocols like SSH, DNSSEC, PGP, or Secure RPC.
Related Q&A from Michael Gregg
Enterprise security expert, Michael Gregg answers a question regarding port 3389 issues when a user tries to open port 3389 RDP on their router to ...continue reading
Expert Michael Gregg answers a reader question about Snort and the interfaces it uses.continue reading
Security expert Michael Gregg notes the risks to enteprise security that mobile devices may cause.continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.