Back to Good Ol’ TCP/IP in the Good Ol’ US of A

• Good enough of government work

• TCP/IP has 4 layers

  • Layer 4 - Application Layer (think telnet, ftp, http, etc.)
  • Layer 3 - Transport Layer (think TCP/UDP)
  • Layer 2 - Network Layer (think IP)
  • Layer 1 - Link Layer (think ethernet card)

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