Senin, 23 Februari 2009

ccna 4 final exam version 1 part 3

37. Refer to the exhibit. The SSH connections between the remote user and the server are failing. The correct configuration of NAT has been verified. What is the most likely cause of the problem?
SSH is unable to pass through NAT.
There are incorrect access control list entries.
The access list has the incorrect port number for SSH.
The ip helper command is required on S0/0/0 to allow inbound connections.

38. Refer to the exhibit. A technician issues the show interface s0/0/0 command on R1 while troubleshooting a network problem. What two conclusions can be determined by from the output shown? (Choose two.)
The bandwidth has been set to the value of a T1 line.
Encapsulation should of this inteface be changed to PPP.
There is no failure indicated in an OSI Layer 1 or Layer 2.
The physical connection between the two routers has failed.
The IP address of S0/0 is invalid, given the subnet mask being used.

39. Refer to the exhibit. A packet is being sent from Host A to Host B through the VPN tunnel between R1 and R3. When the packet first arrives at R3, what are the source and destination IP addresses of the packet?
Source 192.168.1.2 - Destination 192.168.4.2
Source 192.168.3.1 - Destination 192.168.3.2
Source 192.168.2.1 - Destination 192.168.3.2
Source 192.168.3.1 - Destination 192.168.4.2

40. An administrator is configuring a dual stack router with IPv6 and IPv4 using RIPng. The administrator receives an error message when trying to enter the IPv4 routes into RIPng. What is the cause of the problem?
RIPng is incompatible with dual-stack technology.
All interfaces have been configured with the incorrect IPv4 addresses.
RIPv1 or RIPv2 needs to be configured in addition to RIPng to successfully use IPv4.
When IPv4 and IPv6 are configured on the same interface, all IPv4 addresses are shut down in favor of the newer technology.

41. Which wireless solution can provide mobile users with non line-of-sight broadband Internet access at speeds comparable to DSL or cable?
Wi-Fi
WiMAX
satellite
Metro Ethernet

42. A network administrator added two switches and a new VLAN over the past weekend. How can the administrator determine if the additions and changes improved performance and availability on the company intranet?
Perform a baseline test and compare the current values to values that were obtained in previous weeks.
Interview departmental secretaries and determine if they think load time for web pages is improved.
Compare the hit counts on the company web server for the current week to the values that were recorded from previous weeks.
Performance on the intranet can be determined by monitoring load times of company web pages from remote sites.

43. Refer to the exhibit. The network administrator is adding R1 to an existing network. As a part of the corporate IT procedures, the administrator attempts to back up the router Cisco IOS software of R1 and receives the output shown. The network administrator then attempts unsuccessfully to ping the TFTP server from the console session. What should be done next to isolate this problem?
From R2, validate that interface Fa0/0 is operational.
From the TFTP server, verify that the software on the TFTP server is operational.
From the TFTP server, confirm there is enough room on the TFTP server for the Cisco IOS software.
From the console session, make sure that R1 has a route to the network where the TFTP server resides.

44. What functionality do access control lists provide when implementing dynamic NAT on a Cisco router?
defines which addresses can be translated
defines which addresses are assigned to a NAT pool
defines which addresses are allowed out of the router
defines which addresses can be accessed from the inside network

45. A network administrator is working with an applications team to fix a problem that a server based application is having with response time. The administrator has examined the network portions of the data path and identified several possible problem areas. The applications team has simultaneously identified potential issues with the current release of software. The network administrator begins addressing the network issues while the applications team implements software patches. Which statement applies to this situation?
Changes to the network will reveal problems that are caused by the new patches.
Scheduling will be more difficult if the network and software teams work independently.
It will be difficult to isolate the problem if two teams are implementing changes independently.
Results from changes will be easier to reconcile and document if each team works in isolation.

46. Refer to the exhibit. R1 is performing NAT overload for the 10.1.1.0/24 inside network. Host A has sent a packet to the web server. What is the destination IP address of the return packet from the web server?
10.1.1.2:1234
172.30.20.1:1234
172.30.20.1:3333
192.168.1.2:80

47. Which three guidelines would help contribute to creating a strong password policy? (Choose three.)
Once a good password is created, do not change it.
Deliberately misspell words when creating passwords.
Create passwords that are at least 8 characters in length.
Use combinations of upper case, lower case, and special characters.
Write passwords in locations that can be easily retrieved to avoid being locked out.
Use long words found in the dictionary to make passwords that are easy to remember.

48. What will be the result of adding the command ip dhcp excluded-address 172.16.4.1 172.16.4.5 to the configuration of a local router that has been configured as a DHCP server?
Traffic that is destined for 172.16.4.1 and 172.16.4.5 will be dropped by the router.
Traffic will not be routed from clients with addresses between 172.16.4.1 and 172.16.4.5.
The DHCP server function of the router will not issue the addresses between 172.16.4.1 and 172.16.4.5.
The router will ignore all traffic that comes from the DHCP servers with addresses 172.16.4.1 and 172.16.4.5.

49. Which two statements are true about IPv6? (Choose two.)
Security options are build into IPv6.
IPv6 addresses require less router overhead to process.
IPv6 can only be configured on an interface that does not have IPv4 on it.
There is no way to translate between IPv4 addresses and IPv6 addresses.
When enabled on a router, IPv6 can automatically configure link-local IPv6 addresses on all interfaces.

50. Refer to the exhibit. A network administrator has issued the commands that are shown on Router1 and Router2. A later review of the routing tables reveals that neither router is learning the LAN network of the neighbor router. What is most likely the problem with the RIPng configuration?
The serial interfaces are in different subnets.
The RIPng process is not enabled on interfaces.
The RIPng network command is not configured.
The RIPng processes do not match between Router1 and Router2.

51. At what physical location does the responsibilty for a WAN connection change from the user to the service provider?
demilitarized zone (DMZ)
demarcation point
local loop
cloud

52. Refer to the exhibit. A host connected to Fa0/0 is unable to acquire an IP address from this DHCP server. The output of the debug ip dhcp server command shows "DHCPD: there is no address pool for 192.168.1.1". What is the problem?
The 192.168.1.1 address has not been excluded from the DHCP pool.
The pool of addresses for the 192Network pool is incorrect.
The default router for the 192Network pool is incorrect.
The 192.168.1.1 address is already configured on Fa0/0.

53. Which three functions are provided by the Local Management Interface used in Frame Relay networks? (Choose three.)
exchange information about the status of virtual circuits.
map DLCIs to network addresses.
provide flow control.
provide error notification.
provide congestion notification.
send keepalive packets to verify operation of the PVC.

54. Which three items are LCP options that can be configured for PPP? (Choose three.)
CHAP
Stacker
IPCP
CDPCP
Multilink

55. What are two main components of data confidentiality? (Choose two.)
checksum
digital certificates
encapsulation
encryption

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