Unit 3 Assignment 1

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Unit 3 Assignment 1 John Bareswilt 1. b. The network uses standards defined in TCP/IP RFCs, plus other standards. 2. c. Ethernet d. TCP/IP mapping 3. a. It exists as a written document. c. It has been passed through some form of review and approval or certification process. 4. b. International standard documents have been reviewed more thoroughly d. International standards typically mean that the standards group has been authorized by many countries to create standards that apply to multiple countries 5. c. The physical layer sits just below the data link layer. d. The network layer sits in the middle of the five layers. 6. b. IEEE c. Vendor groups 7. d. To keep intellectual property rights to the technology inside the company 8. b. IP is a network layer protocol. 9. A. Vendor models 10. b. The lower four layers of TCP/IP define the same kinds of functions as the matching layer numbers from OSI. 11. c. The PCs use two wires to create a circuit to send data from PC1 to PC2. 12. A.The Ethernet header lists PC2’s MAC address so that PC2 will realize that the data is meant for PC2. 13. b. Packet 14. b. Can be written in DDN format d. Used by routers to make a forwarding decision 15. a. 48 bits in length 16. a. LANs generally connect devices that are nearer to each other, compared to WANs. 17. b. Two TCP/IP data-link protocols are Ethernet and PPP. c Data-link protocols define addresses that identify devices connected to the underlying physical link. 18. a. It focuses mostly on the network between endpoints, rather than the endpoints. c. IP provides logical addressing and routing services. 19. d. None of the answers is correct. 20. A. Data-link header b. Network layer header c. Transport layer header It could be all 4 though since a web browser ia an application.

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