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CCNA 56题(1) |
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| CCNA 56题(1) |
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作者：佚名 文章来源：不详更新时间：2006-5-30 8:37:48  |
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Hope this helps. It helped me study for the CCNA.
1. What are the valid Host ID's for 222.37.2.50 /24 ? A.) 222.37.2.48 - 222.37.2.66 B.) 222.37.2.49 - 222.37.2.62 C.) 222.37.2.0 - 222.37.2.255 D.) 222.37.0.0 - 222.37.255.254 E.) 222.37.2.1 - 222.37.2.254
D
2. Which commands listed below will move you from interface configuration mode back to global configuration mode? A.) CTL+Z B.) CTL+F C.) exit D.) global E.) config t
C CTRL-Z and CTRL-C will abort you back to the root. Exit goes back one level.
3. You have a Unix server running the TFTP Daemon. What is the command to load a configuration file from the TFTP server into the routers RAM? A.) copy tftp ram B.) copy tftp running-config C.) read tftp D.) copy tftp startup-config E.) copy tftp nvram
B Remember RAM = RUNNING-CONFIG. All changes to RAM are immediate!
4. Given the following static route command, ip route 3.3.3.0 255.255.255.0 4.4.4.4 125, which portion represents the next hop TCP/IP address? A.) 125 B.) 3.3.3.0 C.) 255.255.255.0 D.) route E.) 4.4.4.4
E Router(config)#ip route 3.3.3.0 255.255.255.0 ? A.B.C.D Forwarding router's address
5. In regards to the ISDN BRI standard, which channel is used for control? A.) E B.) Q C.) D D.) I E.) B
C B is Bearer for Data (2 channels at 64kb each). D is for Control (16kb).
6. Which Distance Vector characteristic can help to speed up convergence? A.) Inverse ARP. B.) Poison Reverse. C.) Triggered Updates. D.) Split Horizon. E.) Hold Down timers.
C Instead of waiting on a pre-set periodic interval (before sending the routing table), DV routing protocols can send triggered updates to immediately notify the neighbor routers. Hold down timers, Poison Reverse, and Split Horizon are features that are used to avoid routing loops.
7. What command would show the current configuration register settings? A.) show running-config B.) show startup-config C.) show nvram D.) show ram E.) show version F.) show ios
E For most routers the configuration register settings are: 0x2102 normal operation (parse NVRAM at startup), or 0x2142 password recovery (ignore NVRAM during startup).
8. What would the following command do?: 'Show Frame-Relay PVC' A.) Display LMI Info. B.) The command is incomplete, and would be ignored. C.) Display all configured DLCI's. D.) Debug a Frame-Relay Problem. E.) Show Virtual Links.
C The Permament Virtual Circuit (PVC) info is d
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isplayed along with the Data Link Connection Identifiers (DLCI)'s.
9. Which of the following are examples of the Session Layer? (3 answers) A.) SQL B.) NFS C.) IP D.) TCP E.) Netbios Names F.) Token Ring
A B E Controls mechanisms such as checkpoints, terminations, and restarts to establish, maintain, and synchronize communications between applications. Examples: SQL, RFC, RPC, X-Windows, NetBIOS Names Layer 5 of the OSI reference model.
10. When editing a line in the CLI mode, what does 'CTRL-P' do? A.) Moves you to the next word. B.) Moves you to the next command. C.) Moves you to the end of the line. D.) Moves you to the beginning of the line. E.) Moves you to the previous command.
E
11. The Internet Control Message Protocol occurs at what layer of the seven layer model? A.) Physical B.) Session C.) Datalink D.) Network E.) Presentation F.) Transport
D ICMP is used for error handling and testing at layer 3. Ping and traceroute are examples of ICMP. Network LayerProvides path determination using a hierarchal logical address defined with a network portion and node portion, net.node.Examples: IP, IPX.
12. Which command listed below enables load balancing over two multiple paths for IPX on a Cisco router? A.) ipx routing 2 B.) ipx round-robin 2 C.) ipx maximum-paths 2 D.) ipx rip 2 E.) ipx sap 2 F.) ipx gns 2
C The default IPX routing protocol is IPX-RIP. By default, RIP selects the best path, and keeps only one route in its routing table. The 'IPX maximum-paths' command allows RIP to load balance over up to 6 paths.
13. Which of the following is an example of the Physical Layer? A.) IP B.) LLC C.) SQL D.) DDP E.) Ethernet
E
14. What class address is 193.1.3.4 ? A.) C B.) B C.) multi-cast D.) broadcast E.) A F.) D
A
15. Novell NetWare has an Ethernet frame type called Ethernet_802.3. What is the matching Cisco command line keyword for this encapsulation method? A.) arpa B.) snap C.) novell-ether D.) sap E.) dix F.) gns
C Novell 802.2 = sap (contains 802.2 LLC headers) Novell 802.3 = novell-ether (NetWare proprietary) Ethernet_II = arpa (the Internet standard) snap = snap (field type set to 'AA')
16. What would be the first command from global configuration mode to perform the following: 1. Enable IGRP on the router for interface E0 2. Tell IGRP to use an address of 157.89.4.4 255.255.255.0 3. Tell IGRP to provide routing updates for AS numb
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er 200? A.) router igrp 157.89.4.4 B.) network 157.89.4.0 255.255.255.1 C.) router igrp int e1 D.) router igrp 157.89.0.0 E.) network 157.89.4.0 F.) router igrp 200
F. You have to specify which routing protocol first. For IGRP you must also specify the autonomous system number. Router(config)#router igrp ? <1-65535> Autonomous system number
17. From global configuration mode, which command will create subinterface #1 for serial 0? A.) int sub serial 0 B.) int serial 0 subinterface 1 C.) int ss 0 D.) int s0.1 point-to-point E.) int serial 0 subinterface 0 F.) int s0
D. Command syntax for creating sub-interfaces:
18. The command 'ip host Dallas 157.89.8.64' maps the host name Dallas with its IP address. What command would display all such mappings? A.) show dns B.) show dns entry dallas C.) show neighbors D.) show hosts E.) show ip table F.) show dns cache
D Router#show hosts Host Flags Age Type Address(es) www.eku.edu (temp, OK) 0 IP 157.89.8.2 dallas (perm, OK) 0 IP 157.89.8.64 Perm - permament static entries Temp - temporary usually resolved via DNS
19. The command 'show running-config' displays the configuration script in RAM, but what other command could you use to show information about objects stored in RAM? A.) show startup-config B.) show all C.) show config D.) debug ram E.) show buffers F.) show start
E Packets are stored in memory locations called buffers during periods when the router becomes over-loaded with other requests.
20. Which of the following are examples of the Datalink Layer? (2 answers) A.) SQL B.) IP C.) MAC D.) TCP E.) LLC
C E MAC and LLC are the sublayers of the Datalink layer.
21. Which type of switching reads in the entire frame before forwarding it? A.) Fast Forward B.) Tabling C.) Cut-Through D.) Store-and-Forward E.) Inverse ARP F.) Routing
D Store-and-Forward is slower, but it checks the frame for errors before forwarding. This can actually help to improve overall network performance on noisy lines.
22. What is the standard ISDN term for a non-native analog telephone? A.) ET B.) LE C.) TE2 D.) TE1 E.) TA C Terminal Equipment 2 (TE2) does not support native digital ISDN. The analog device will require an external analog to digital converter.
23. Which layer of the 7 layer model is responsible for representing the application information between 2 different OS's? For example, converting ASCII to EBCIDIC. A.) Transport B.) Ph
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ysical C.) Application D.) Network E.) Session F.) Presentation
F. Presentation Layer Accepts data from application layer and negotiates data representation, syntax, compression and encryption. Examples: ASCII, EBCDIC, JPEG, GIF, PICT, MIDI, MPEG
24. How do you view all debugging that is currently enabled? A.) show running-config B.) show startup-config C.) show debug D.) debug update E.) show flash F.) show version
C.
25. Which of the following is an example of the Network Layer? A.) SQL B.) LLC C.) TCP D.) IP E.) Token Ring
D Most protocol suites have differnet OSI layer protocols within them. At layer 3, IP is for TCP/IP. TCP is layer 4. IPX is for IPX/SPX. SPX is layer 4.DDP is for Appletalk
26. Which type of switching is considered to be 'wire speed?' A.) Inverted B.) Layer 4 C.) Cut-Through D.) Multiplexed E.) Layer 3 F.) Store and Forward
C
27. On an ISDN BRI interface, the control channel is the 'D' channel. What is the rate of this channel? A.) 1.544 Mbps B.) 2.048 Mbps C.) 128 Kbps D.) 16 Kbps E.) 64 Kbps
D
28 Which commands are valid to turn off all debugging? ( 2 answers) A.) clear logging B.) no debug C.) no logging D.) clear debug E.) undebug all F.) no debug all
E F
29. Which of the following are valid Host ID's for 157.89.9.50 /28 (12 bits of subnetting)? A.) 157.89.9.49 - 157.89.9.64 B.) 157.89.0.0 - 157.89.255.255 C.) 157.89.9.0 - 157.89.9.255 D.) 157.89.9.32 - 157.89.9.63 E.) 157.89.9.49 - 157.89.9.62
E Below is a very easy to use shortcut that requires no binary math: Figure out the mask: /28 = 255.255.255.240 Figure out the subnet multiple: 256-240=16 Subnets are 16,32,48,64,80, etc This is subnet 48, next subnet is 64, so the broadcast address is 63! Everything between the subnet (48) and broadcast (63) are the valid hosts. In this example, based on the given mask, the valid host ranges are 49-62.
30. What is a characteristic of Store and Forward switches? A.) They decrease latency. B.) They forward the frame before it is completely read. C.) They are the same a [1] [2] [3] 下一页
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