TCP/IP - TCP/IP (3)
| 17. | Which of the following describe the DHCP Discover message?
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Answer: Option B Explanation: A client that sends out a DHCP Discover message in order to receive an IP address sends out a broadcast at both layer 2 and layer 3. The layer 2 broadcast is all Fs in hex, or FF:FF:FF:FF:FF:FF. The layer 3 broadcast is 255.255.255.255, which means all networks and all hosts. DHCP is connectionless, which means it uses User Datagram Protocol (UDP) at the Transport layer, also called the Host-to-Host layer. |
| 18. | What layer in the TCP/IP stack is equivalent to the Transport layer of the OSI model? |
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Answer: Option B Explanation: The four layers of the TCP/IP stack (also called the DoD model) are Application/Process, Host-to-Host, Internet, and Network Access. The Host-to-Host layer is equivalent to the Transport layer of the OSI model. |
| 19. | Which of the following services use TCP?
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Answer: Option B Explanation: SMTP, HTTP and FTP use TCP. |