ccna routing and switching or security

ccna routing and switching or security.5-6 Self-Assessment QuestionsThe following self-assessment questions will help you gauge your understanding of the content of this chapter. Please read each option carefully, as there may be more than one correct answer. For each self-test question, select all the correct answers.TCP/IP Protocol Stack 1. How many layers does the TCP/IP protocol stack contain? A.3 layers B.4 layers C.5 layers D.7 layers2. Which of the following statements about the IP protocol and the TCP/IP stack is false? A. The Internet layer corresponds to layer 3 of the OSI reference model B. The IP system provides connectionless datagram transmission C. The IP protocol provides best-effort transmission and offers data recovery D. In the IP header, the source and destination addresses total 64 bits3. the host portion of a Class A address is a bit. A. 8 B. 16 C. 20 D. 244. 191.75.39.24 is a class address. A. Class A B. Class B C. Class C D. None of the above answers are correct5.172.16.240.256 belongs to class address. A. Class A B. Class B C. Class C D. None of the above answers are correct6. which of the following is a private IP address? A. 10.189.289.66 B. 172.32.18.19 C. 192.169.1.1 D. None of the above answers are true7. Use the commandping to check connectivity, if you see a "request timed out" or "target device unreachable" message in the response, which layer of the OSI reference model is the problem? A. Transport layer or lower B. Data link layer or lower C. Network layer or lower D. Application layer or lower