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ECS15: Introduction to Computers

ECS15: Introduction to Computers. fall 2010 S. Felix Wu Final review. Compound propositions. Truth table:. Compound propositions. Truth table:. Compound propositions. Truth table:. Compound propositions. Truth table:. Compound propositions. Truth table:.

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ECS15: Introduction to Computers

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  1. ECS15:Introduction to Computers fall 2010 S. Felix Wu Final review

  2. Compound propositions Truth table:

  3. Compound propositions Truth table:

  4. Compound propositions Truth table:

  5. Compound propositions Truth table:

  6. Compound propositions Truth table: One of the answers  (~(p^q)) ^ (pvq)

  7. Compound propositions Truth table:

  8. Compound propositions Truth table:

  9. Computer sending the packet Destination computer Length of the packet Checksum for integrity

  10. What is the difference between Moobilenet and MoobilenetX? MoobilenetX: Authenticate the user at the data link layer (L2) 802.11x for the first hop (device  wireless access point) Moobilenet: Obtain an IP address via DHCP (Dynamic Host Configuration Protocol) Web interface for authentication IP address can be used to access Internet only after that. (Similar model for SMF airport free wireless, T-mobile wireless, or ATT wireless)

  11. Two ways to get an IP address: - Manually -Dynamically, through DHCP (Dynamic Host Configuration Protocol)

  12. Did not receive an acknowledgment (ACK)

  13. TCP 3-way Hand-shake? How can the publisher know that “this” is actually from UCDavis? server client SYN seq=x SYN seq=y, ACK x+1 ACK y+1 connection established

  14. Why Social Informatics can help our communication? What is the disadvantage of our Internet? Global connectivity

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