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| 作者：不明 来源：www.pccode.net 整理 发布时间：2007-1-24 15:24:30 发布人：wongrs | |
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ip classless !! line con 0 line aux 0 line vty 0 4 login ! end 77. [RxNx] What routing protocols are configured? a) EIGRP, IGRP, RIP b) IGRP RTMP IPX NLSP c) IPX RIP, IGRP, RTMP d) EIGRP, RTMP, IPX RIP e) IPX RIP, IGRP 78. [RXNx] The Serial 0/0 IPX encapsulation of Router_A is: a) Novell-ether b) SAP c) ARPA d) SNAP e) Can not be determined f) HDLC CCNA试题72-78答案 72. [xINx] The size of a window in a TCP segment establishes what? (Choose one.) a) The maximum number of bytes that a single frame may not exceed b) The allowable bandwidth for this TCP session c) The number of octets that the receiver must be willing to accept d) The number of 32-bit words in the header e) The number of octets that the sender is willing to accept Answer e) The number of octets that the sender is willing to accept 73. [xINx] Which protocols are best described as connection-oriented and reliable? (Choose two.) a) UDP b) IP c) TCP d) IPX e) TCP over IP f) UDP over IP Answer c) TCP e) TCP over IP This question is meant to be a little tricky. TCP is layer 4, which uses IP at layer 3. 74. [xINx] A Telnet session to a remote host would be addressed to what port number at the remote host? (Choose one.) a) UDP port 53 b) TCP port 53 c) UDP port 21 d) TCP port 21 e) UDP port 161 f) TCP port 23 Answer f) TCP port 23 In the capture below NetXray interpolates the data and shows a source port of 1074 to a destination port of telnet. Refer to the data below the highlighted portion. 0x17 is 1*161 + 7* 160 = 23. 75. [xINx] TCP "source" port number(s): (Choose the one that best describes.) a) Depends on the application being accessed on the destination host. b) Depends on the application running on the source host. c) Are usually assigned by the source host, and are typically some number greater than 1023. d) Are assigned by the source host and are usually one of the "well known" port numbers. e) Must be negotiated by the sender and receiver during session setup. Answer c) Are usually assigned by the source host, and are typically some number greater than 1023. The source port in the following capture is 1074:
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