2011-2012第2学期计算机网络复习题.pdf

PART Ⅰ: Single Choice 得分 1. The primary function of the address resolution protocol (ARP) that resides in Internet hosts and routers is: A. To provide LAN router functions B. To translate between LAN addresses and physical interface addresses C. To translate between IP addresses and LAN addresses D. To calculate the shortest path between two nodes on a LAN 2. Queuing can NOToccur in A. the router output ports B. the router input ports C. physical medium D. an interconnection network 3. The host component of a CIDR address of the form a.b.c.d/22 can contain addresses for: A. 2(32-22) hosts minus “special” hosts B. 512 hosts minus “special” hosts C. d times 22 hosts D. 10 hosts minus “special” hosts 4. The length of an Ethernet address is A. 4 bytes B. 6 bytes C. 14 bytes D. 20 bytes 5. Host A sends a TCP segment (Seq = 43, ACK = 103) to host B, and then host B replies with a TCP segment (Seq = 103, ACK = 57). The payload of the first TCP segment is A. 14 bytes long B. 43 bytes long C. 57 bytes long D. 60 bytes long 6. Longest prefix matching is used A. in routers to know on which link can forward packets B. in classless addressing to use the address space more efficiently than in classful addressing. C. by NAT to increase the available address space D. to assign subnet masks. 7. Using module 2 arithmetic to compute the CRC code for message 101101110011 with the generator 10011, the result is A．01011 B．0011 试卷编号： 1-A 第1 页共23 页 C．10011 D．1110 8.Which windows command usually can be used to show the intermediate routers along the path to a remote destination? A. ping B. showroute C.