【正文】
. C. D. E. 17. What layer in the TCP/IP stack is equivalent to the Transport layer of the OSI model?17. 在 TCP/IP 堆棧中的哪個層相當(dāng)于 OSI 模型的傳輸層?A. ApplicationB. HosttohostC. InternetD. Network Access18. Which statements are true regarding ICMP packets? (Choose two)18. 關(guān)于ICMP數(shù)據(jù)包,哪些陳述是對的?(選擇兩項)A. ICMP guarantees datagram delivery.ICMP 保證數(shù)據(jù)包傳遞。B. ICMP can provide hosts with information about network problems.ICMP能為主機提供有關(guān)網(wǎng)絡(luò)問題的信息。C. ICMP is encapsulated within IP datagrams.ICMP 是封裝在IP 數(shù)據(jù)報中。D. ICMP is encapsulated within UDP datagrams.ICMP 封裝在 UDP 數(shù)據(jù)報。19. What is the address range of a Class B network address in binary?19. B類網(wǎng)絡(luò)地址的二進制的范圍是多少?A. 01xxxxxxB. 0xxxxxxxC. 10xxxxxxD. 110xxxxx20. Which of the following protocols uses both TCP and UDP?20. 下列哪一個協(xié)議TCP和IP都使用?A. FTPB. SMTPC. TelnetD. DNS 5