cwav
发表于 2003-12-18 23:14:35
CCNA Tips，考NA的进来看看 (荐)
CCNA Tips<br>1. Use“sh interface” to see Frame Relay LMI configuration . <br>2. Use“sh IP protocol” to see the routing protocol which had been configed on router .<br>3. If you want to disable the advanced editing features on a cisco router you use “terminal no editing” .<br>4. Use “int s0.234 point-to-point” to setup a FRsubinterface.<br>5. If you only have a few route to config or want to save some WAN utilization, you need to use static route . <br>6. Cisco provide two kinds of encapsulation on FR , they are Cisco and IETF . <br>7. Use “sh Ip protocol or debug IP rip” to display RIP network information . <br>8. Cisco support three kind of LMI types , they are Cisco , ANSI and Q933a .<br>9. Use “conf t , line console 0, login,password xxx” to config a password on console .<br>10. Use “ show access-list or show access-list 150” to view access-list 150 .<br>11. Use “ clock rate 56000” to set clock on a DCE port . <br>12. 802.3 is the default encapsulation on a ETH when you enable Novell .<br>13. Protocol begin with Q mean “ switch & signaling” . <br>14. Interconnectivity and Interoperability are the two challenges of creating a net model .<br>15. In FR the DLCI identifies a connection between two DTEs .<br>16.Class A is 1-127, Class C is 192-223, and Class D is 224-239 and used for multicast packets.<br>16. CSU/DSU terminates a digital circuit at the customer site<br>17. Multiplexorallows more than one signal to be sent out simultaneously over one physical circuit<br>17. The value 24 after / in the ip address is called “ a prefix” .<br>18. The maximum number of name server addresses which can be set in “IP NAME SERVER” command is SIX . <br>19. To subnet , Subnet bits are added to the default subnet mask . <br>20. You can’t issue a ip address on the vty or console or AUX . <br>21. 255.255.255.255 is a local broadcast; 3.255.255.255 is a directed broadcast . <br>22. Command “ ip host” can config on global and interface model . <br>23. To add bits to a default subnet mask , the bits are taken from “the highest-order contiguous bits of the host address . <br>24. Transport layer maintain the session establish and flow control . <br>25. When the congestion occur on the middle site, the sliding window can’t inform TCP .<br>26. UDP head contain the SP , DP , Length ,UDP checksum .<br>27. ICMP redirect is sent by “ gateway to the host” . <br>28. Socket function stand at OSI model session layer .<br>29. Port : the point where upper-layer processes access transport layer services .<br>30. Flow Control use flow control . <br>31. ARP make a MAC address logically independent of the physical hardware .<br>32. “Classless”routing protocol includes subnet information in packets that it routes<br>33. default interval for SAP updates is 60 seconds .<br>34. Access-list numbers 1000-1099 deal with SAP type of access-list<br>35. use “ipx routing” to enable IPX <br>36. NFS , X-windows, Netbios Name, RPC and SQL at session layer .<br>37. “show frame-relay pvc” , “show run”displayDLCIs .<br>38. Use “show buffers” to see the objects located in RAM except running-configuration .<br>39. “show IP protocol” to see configured routing protocol , eanbled routing protocol and the timer of some routing protocols .<br>40. no debug all equal undebug all . <br>41. DCE provide the clock on the line <br>42. the reasons to creat VLAN :<br>limite the broadcast propagation<br>reduce administrative overhead<br>change the device’s subnet but needn’t change the connecting port .<br>43. frame-relay map is working on Datalink layer <br>44. MAC address has 48 bit , 24bits for vendor and 24bits for serial number .<br>45. Application layer establish the avialability of the intended communication partner . <br>46. Router is used to allow the connectivity between the token ring and ethernet network .<br>47. A traffic light is an example of flow control . <br>48. The three major functions of netwrok layer : logical address, forward packets, determines the path .<br>49. The three characteritics of switch is : forward frames base upon mac address , increase available bandwidth , increase the number of collision domains .<br>50. The propose of wildcard is to match the certain portion of ip address while ignoring the rest .<br>51. Class C ip address has the least host number . Class D & E have no network mask . <br>52. Windowing is a method of flow control <br>53. IGRP has three route advertises: interior, exterior, system .<br>54. ISDN T1 PRI has 23 B channels and 1 64k D channel .<br>55. FD Ethernet requires : loopback and collision dectet disable , FD nic card . <br>56. “CDP timer 250” change the cdp sent frequency . <br>
cwav
发表于 2003-12-18 23:15:40
句句都是经典，对考试很有帮助。<br><br>TT，胡大居然说我没动静 ，看来只能搬点东西上来了。我硬盘里2G的资料还怕贴不完？
cwav
发表于 2003-12-18 23:18:47
严禁只背TK，违者……挨胡大一吻～
chinamoon
发表于 2003-12-19 00:14:22
相当不错，应该列入精华区。
cwav
发表于 2004-1-11 23:32:42
：）考试不考那个，做那个完全是为了个人兴趣以及提升自己的能力
cwav
发表于 2003-12-21 22:53:18
：）我看得都是很经典的，烂的我才不看哩
chinamoon
发表于 2004-1-4 23:40:37
有问题请提出。<br><br>原文由 jonathan 发表:<br>能不能注释一下啊，有的看不大懂。买支持<br><br><br><br>
阿米巴原始虫
发表于 2004-1-5 09:22:04
是啊，这个版有那么多大哥一定会替你解答的~
cwav
发表于 2004-1-5 10:36:18
原文由 jonathan 发表:<br>能不能注释一下啊，有的看不大懂。买支持<br><br><br><br><br><br>这些都不是很难的，相信你把书本过一遍，应该没有问题。<br>如果有问题可以提出的喔
wsq
发表于 2003-12-19 10:23:00
<BLOCKQUOTE><strong>引用</strong>：<HR Size=1>原文由 <b>cwav</b> 发表:<br>严禁只背TK，违者……挨胡大一吻～<HR SIZE=1></BLOCKQUOTE><br><br>可怕啊！
