CCNA Tips，考NA的进来看看 (荐)

cwav · 发表于 2003-12-18 23:14:35

CCNA Tips 1. Use “sh interface” to see Frame Relay LMI configuration . 2. Use “sh IP protocol” to see the routing protocol which had been configed on router . 3. If you want to disable the advanced editing features on a cisco router you use “terminal no editing” . 4. Use “int s0.234 point-to-point” to setup a FR subinterface. 5. If you only have a few route to config or want to save some WAN utilization, you need to use static route . 6. Cisco provide two kinds of encapsulation on FR , they are Cisco and IETF . 7. Use “sh Ip protocol or debug IP rip” to display RIP network information . 8. Cisco support three kind of LMI types , they are Cisco , ANSI and Q933a . 9. Use “conf t , line console 0, login, password xxx” to config a password on console . 10. Use “ show access-list or show access-list 150” to view access-list 150 . 11. Use “ clock rate 56000” to set clock on a DCE port . 12. 802.3 is the default encapsulation on a ETH when you enable Novell . 13. Protocol begin with Q mean “ switch & signaling” . 14. Interconnectivity and Interoperability are the two challenges of creating a net model . 15. In FR the DLCI identifies a connection between two DTEs . 16.Class A is 1-127, Class C is 192-223, and Class D is 224-239 and used for multicast packets. 16. CSU/DSU terminates a digital circuit at the customer site 17. Multiplexor allows more than one signal to be sent out simultaneously over one physical circuit 17. The value 24 after / in the ip address is called “ a prefix” . 18. The maximum number of name server addresses which can be set in “IP NAME SERVER” command is SIX . 19. To subnet , Subnet bits are added to the default subnet mask . 20. You can’t issue a ip address on the vty or console or AUX . 21. 255.255.255.255 is a local broadcast; 3.255.255.255 is a directed broadcast . 22. Command “ ip host” can config on global and interface model . 23. To add bits to a default subnet mask , the bits are taken from “the highest-order contiguous bits of the host address . 24. Transport layer maintain the session establish and flow control . 25. When the congestion occur on the middle site, the sliding window can’t inform TCP . 26. UDP head contain the SP , DP , Length ,UDP checksum . 27. ICMP redirect is sent by “ gateway to the host” . 28. Socket function stand at OSI model session layer . 29. Port : the point where upper-layer processes access transport layer services . 30. Flow Control use flow control . 31. ARP make a MAC address logically independent of the physical hardware . 32. “Classless” routing protocol includes subnet information in packets that it routes 33. default interval for SAP updates is 60 seconds . 34. Access-list numbers 1000-1099 deal with SAP type of access-list 35. use “ipx routing” to enable IPX 36. NFS , X-windows, Netbios Name, RPC and SQL at session layer . 37. “show frame-relay pvc” , “show run” display DLCIs . 38. Use “show buffers” to see the objects located in RAM except running-configuration . 39. “show IP protocol” to see configured routing protocol , eanbled routing protocol and the timer of some routing protocols . 40. no debug all equal undebug all . 41. DCE provide the clock on the line 42. the reasons to creat VLAN : limite the broadcast propagation reduce administrative overhead change the device’s subnet but needn’t change the connecting port . 43. frame-relay map is working on Datalink layer 44. MAC address has 48 bit , 24bits for vendor and 24bits for serial number . 45. Application layer establish the avialability of the intended communication partner . 46. Router is used to allow the connectivity between the token ring and ethernet network . 47. A traffic light is an example of flow control . 48. The three major functions of netwrok layer : logical address, forward packets, determines the path . 49. The three characteritics of switch is : forward frames base upon mac address , increase available bandwidth , increase the number of collision domains . 50. The propose of wildcard is to match the certain portion of ip address while ignoring the rest . 51. Class C ip address has the least host number . Class D & E have no network mask . 52. Windowing is a method of flow control 53. IGRP has three route advertises: interior, exterior, system . 54. ISDN T1 PRI has 23 B channels and 1 64k D channel . 55. FD Ethernet requires : loopback and collision dectet disable , FD nic card . 56. “CDP timer 250” change the cdp sent frequency .

cwav · 发表于 2003-12-18 23:15:40

句句都是经典，对考试很有帮助。 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。

原文由 [B]jonathan[/B] 发表: 能不能注释一下啊，有的看不大懂。买支持

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 [B]jonathan[/B] 发表: 能不能注释一下啊，有的看不大懂。买支持

这些都不是很难的，相信你把书本过一遍，应该没有问题。 如果有问题可以提出的喔

wsq · 发表于 2003-12-19 10:23:00

<BLOCKQUOTE>引用：<HR Size=1>原文由 cwav 发表: 严禁只背TK，违者……挨胡大一吻～<HR SIZE=1></BLOCKQUOTE> 可怕啊！

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[讨论/求助] CCNA Tips，考NA的进来看看 (荐)