最新的Cisco 640-802免費考試真題

問題1

Refer to the exhibit A frame on vlan 1on switch s1 is sent to switch s2 when the frame is received on vlan 2, what causes this behavior?

A. allowing only vlan 2 on the destination.

B. native vlan mismatches

C. trunk mode mismatches

D. vlans that do not correspond to a unique IP subnet

正確答案: B

問題2

Refer to the exhibit.

How many interfaces on R1 should be configured as ip nat inside to grant external access to the entire network?

A. 3

B. 4

C. 1

D. 5

正確答案: B

問題3

Refer to the exhibit. A network associate needs to configure the switches and router in the graphic so that the hosts in VLAN3 and VLAN4 can communicate with the enterprise server in VLAN2. Which two Ethernet segments would need to be configured as trunk links? (Choose two.)

A. D

B. C

C. F

D. A

E. B

F. E

正確答案: B,C

說明：（僅 Fast2test 成員可見）

問題4

What would be the effect of issuing the command ip access-group 115 in on the s0/0/1 interface?

A. No host could connect to RouterC through s0/0/1.

B. Telnet and ping would work but routing updates would fail.

C. Only traffic from the 10.4.4.0 network would pass through the interface.

D. FTP, FTP-DATA, echo, and www would work but telnet would fail.

正確答案: A

問題5

Which additional configuration step is necessary in order to connect to an access point that has SSID broadcasting disabled?

A. Set the SSID value on the client to the SSID configured on the AP.

B. Configure open authentication on the AP and the client.

C. Set the SSID value in the client software to public.

D. Configure MAC address filtering to permit the client to connect to the AP.

正確答案: A

問題6

Refer to the exhibit. Which (config-router) command will allow the network represented on the interface to be advertised by RIP?

A. redistribute ethernet0

B. network 10.12.0.0

C. redistribute 10.12.0.0

D. network ethernet0

正確答案: B

問題7

Two routers named Atlanta and Brevard are connected by their serial interfaces as shown in the exhibit, but there is no data connectivity between them. The Atlanta router is known to have a correct configuration. Given the partial configurations shown in the exhibit, what is the problem on the Brevard router that is causing the lack of connectivity?

A. IPCP closed

B. incorrect subnet mask

C. insufficient bandwidth

D. incompatible encapsulation

E. Link reliability too low

F. incompatible IP addresses

正確答案: F

說明：（僅 Fast2test 成員可見）

問題8

Which command will show the MAC addresses of stations connected to switch ports?

A. show table

B. show mac-address

C. show arp

D. show switchport

正確答案: B

問題9

Which command enhances the 802.1D convergence time on ports that are connected to hosts?

A. spanning-tree cost512

B. spanning-tree uplinkfast

C. spanning-tree backbonefast

D. spanning-tree portfast

正確答案: D

問題10

When you are logged into a switch, which prompt indicates that you are in privileged mode?

A. #

B. @

C. >

D. %

E. $

正確答案: A

問題11

Which IPv6 address is valid?

A. 2031::130F::9C0:876A:130B

B. 2031:0:130F::9C0:876A:130B

C. 2001:0db8:0000:130F:0000:0000:08GC:140B

D. 2001:0db8:0:130H::87C:140B

正確答案: B

問題12

CORRECT TEXT
ACL-3

正確答案:

Corp 1>enable Corp1#configure terminal Corp1(config)#access-list 100 permit tcp host 192.168.33.3 host 172.22.242.23 eq 80 Corp1(config)#access-list 100 deny tcp 192.168.33.0 0.0.0.255 host 172.22.242.23 eq 80 Corp1(config)#access-list 100 permit ip any any Corp1(config)#interface fa 0/1 sh ip int brief Corp1(config-if)#ip access-group 100 out Corp1(config-if)#end Corp1#copy running-config startup-config
Explanation:
Select the console on Corp1 router Configuring ACL Corp1 >enable Corp1#configure terminal comment: To permit only Host C
(192.168. 33. 3){source addr} to access finance server address (172. 22. 242. 23) {destination addr} on port number 80 (web) Corp1(config)#access-list 100 permit tcp host 192. 168. 33. 3 host 172. 22. 242. 23 eq 80 comment: To deny any source to access finance server address (172. 22. 242. 23) {destination addr} on port number 80 (web) Corp1(config)#access-list 100 deny tcp any host 172. 22. 242. 23 eq 80 comment: To permit ip protocol from any source to access any destination because of the implicit deny any any statement at the end of ACL. Corp1(config)#access-list 100 permit ip any any Applying the ACL on the Interface comment: Check show ip interface brief command to identify the interface type and number by checking the IP address configured. Corp1(config)#interface fa 0/1 If the ip address configured already is incorrect as well as the subnet mask, this should be corrected in order ACL to work type this commands at interface mode : no ip address 192. x. x. x 255. x. x. x (removes incorrect configured ip address and subnet mask) Configure Correct IP Address and subnet mask: ip address 172. 22. 242. 30 255. 255. 255. 240 (range of address specified going to server is given as 172. 22. 242. 17-172. 22. 242. 30 ) comment: Place the ACL to check for packets going outside the interface towards the finance web server. Corp1(config-if)#ip access-group 100 out Corp1(config-if)#end Important: To save your running config to startup before exit. Corp1#copy running-config startupconfig Verifying the Configuration :
Step1: show ip interface brief command identifies the interface on which to apply access list.
Step2: Click on each host A, B, C & D.Host opens a web browser page, Select address box of the web browser and type the ip address of finance web server(172. 22. 242. 23) to test whether it permits /deny access to the finance web Server. Step 3: Only Host C (192.168. 33. 3) has access to the server. If the other host can also access then maybe something went wrong in your configuration check whether you configured correctly and in order.
Step 4: If only Host C (192.168. 33. 3) can access the Finance Web Server you can click on NEXT button to successfully submit the ACL SIM.

問題13

Refer to the exhibit. What can be determined about the router from the console output?

A. No configuration file was found in flash.

B. No configuration file was found in the PCMCIA card.

C. Configuration file is normal and will load in 15 seconds.

D. No configuration file was found in NVRAM.

正確答案: D

問題14

Which of the following are benefits of VLANs? (Choose three.)

A. They increase the size of broadcast domains while decreasing the number of collision domains.

B. They allow logical grouping of users by function.

C. They increase the number of broadcast domains while decreasing the size of the broadcast domains.

D. They increase the size of collision domains.

E. They can enhance network security.

F. They simplify switch administration.

正確答案: B,C,E

問題15

What are two characteristics of Telnet? (Choose two.)

A. It is no longer supported on Cisco network devices.

B. It requires an enterprise license in order to be implemented.

C. It is more secure than SSH.

D. It sends data in clear text format.

E. It requires that the destination device be configured to support Telnet connections.

正確答案: D,E

說明：（僅 Fast2test 成員可見）

最新的Cisco Certified Network Associate(CCNA) - 640-802免費考試真題

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