Network Concepts Puzzle

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Across
  1. 2. One of the Goals of Computer Security
  2. 3. one of the types of computer security
  3. 6. OSI Security Architecture can be classified in to
Down
  1. 1. The forth layer of OSI Reference Model
  2. 4. How many Layers are in OSI Reference Model
  3. 5. The third layer of OSI Reference Model