计算机网络基础在线作业（Computer network foundation online homework）.doc

计算机网络基础在线作业（Computer network foundation online homework） Radio examination 1. the following topology that does not belong to the LAN is ____B_____. A total Linetype B relation C star type D ring Radio question 2. is called _____D_____ by changing the frequency of carrier signals to represent 1 and 0 of digital signals. A absolute phase modulation B relative phase modulation C amplitude modulation D FM Radio examination What address format does 3.TCP/IP transport layer protocol use to transfer data to the upper application program? ____C__. (hint: socket (socket) address refers to the transport layer endpoint to the end of the connection address) A IP address B MAC address C port number D socket (socket) address Radio examination 4.DNS protocol is mainly used to achieve which of the following network services? A Mapping from A domain name to IP address Mapping from B physical address to IP address Mapping C IP address to domain name Mapping from D IP address to physical address Radio examination 5. the core equipment of switched LAN is _____B____. A router B switch C hub D Bridge Radio examination 6. which of the following protocols is not a TCP/IP application layer protocol? B A TELNET B PPP C FTP D SMTP Radio examination 7. the first packet switched network in the world is ___B_______. A Internet B ARPAnet C Ethernet D NSFNET Radio examination 8.DHCP is called dynamic host configuration protocol. Which of the following items does not need to be configured in this protocol? ____C___. A IP address and subnet mask B default routers IP address MAC address of C network card IP address of D domain name server Radio examination 9. the URL of a URL is URL, and is ___B___, . A protocol name B host domain name C port D file name Radio examination 10. which of the following statements about exchange is incorrect? B A packet switching using storage and forwarding technology B circuit switching using storage and forwarding technology C message switching technology is less used