Dernières Cisco 640-802 examen pratique questions et réponses

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Code d'Examen: 640-802
Nom d'Examen: Cisco (Cisco Certified Network Associate(CCNA))
Questions et réponses: 653 Q&As

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NO.1 Which command would correctly configure a serial port on a router with the last usable host address in
the 192.216.32.32/29 subnet?
A. Router(config-if)# ip address 192.216.32.38 255.255.255.240
B. Router(config-if)# ip address 192.216.32.39 255.255.255.224
C. Router(config-if)# ip address 192.216.32.63 255.255.255.248
D. Router(config-if)# ip address 192.216.32.39 255.255.255.248
E. Router(config-if)# ip address 192.216.32.63 255.255.255.248
F. Router(config-if)# ip address 192.216.32.38 255.255.255.248
Answer: F

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NO.2 Your ISP has given you the address 223.5.14.6/29 to assign to your router's interface. They have also
given you the default gateway address of 223.5.14.7. After you have configured the address, the router is
unable to ping any remote devices. What is preventing the router from pinging remote devices?
A. The default gateway is not an address on this subnet.
B. The default gateway is the broadcast address for this subnet.
C. The IP address is the broadcast address for this subnet.
D. The IP address is an invalid class D multicast address.
Answer: B

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NO.3 The network administrator has asked you to check the status of the workstation's IP stack by pinging the
loopback address. Which address would you ping to perform this task?
A. 10.1.1.1
B. 127.0.0.1
C. 192.168.0.1
D. 239.1.1.1
Answer: B

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NO.4 Which three options are valid WAN connectivity methods? (Choose three.)
A. PPP
B. WAP
C. HDLC
D. MPLS
E. L2TPv3
F. ATM
Answer: ACF

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NO.5 Which command is used to copy the configuration from RAM into NVRAM?
A. copy running-config startup-config
B. copy startup-config: running-config:
C. copy running config startup config
D. copy startup config running config
E. write terminal
Answer: A

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NO.6 When you are logged into a switch, which prompt indicates that you are in privileged mode?
A. %
B. @
C. >
D. $
E. #
Answer: E

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NO.7 What is the difference between a CSU/DSU and a modem?
A. A CSU/DSU converts analog signals from a router to a leased line; a modem converts analog signals
from a router to a leased line.
B. A CSU/DSU converts analog signals from a router to a phone line; a modem converts digital signals
from a router to a leased line.
C. A CSU/DSU converts digital signals from a router to a phone line; a modem converts analog signals
from a router to a phone line.
D. A CSU/DSU converts digital signals from a router to a leased line; a modem converts digital signals
from a router to a phone line.
Answer: D

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NO.8 Refer to the exhibit.
Which WAN protocol is being used?
A. ATM
B. HDLC
C. Frame Relay
D. PPP
Answer: C

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NO.9 Which protocols are found in the network layer of the OSI reference model and are responsible for
path determination and traffic switching?
A. LAN
B. routing
C. WAN
D. network
Answer: B

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NO.10 Which command shows system hardware and software version information?
A. show configuration
B. show environment
C. show inventory
D. show platform
E. show version
Answer: E

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NO.11 Which two addresses can be assigned to a host with a subnet mask of 255.255.254.0? (Choose two.)
A. 113.10.4.0
B. 186.54.3.0
C. 175.33.3.255
D. 26.35.2.255
E. 17.35.36.0
Answer: BD

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NO.12 Which command is used to debug a ping command?
A. debug icmp
B. debug ip icmp
C. debug tcp
D. debug packet
Answer: B

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NO.13 Which command is used to configure a default route?
A. ip route 172.16.1.0 255.255.255.0 0.0.0.0
B. ip route 172.16.1.0 255.255.255.0 172.16.2.1
C. ip route 0.0.0.0 255.255.255.0 172.16.2.1
D. ip route 0.0.0.0 0.0.0.0 172.16.2.1
Answer: D

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NO.14 A system administrator types the command to change the hostname of a router. Where on the Cisco
IFS is that change stored?
A. NVRAM
B. RAM
C. FLASH
D. ROM
E. PCMCIA
Answer: B

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NO.15 Which command reveals the last method used to powercycle a router?
A. show reload
B. show boot
C. show running-config
D. show version
Answer: D

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NO.16 A company implements video conferencing over IP on their Ethernet LAN. The users notice that the
network slows down, and the video either stutters or fails completely. What is the most likely reason for
this?
A. minimum cell rate (MCR)
B. quality of service (QoS)
C. modulation
D. packet switching exchange (PSE)
E. reliable transport protocol (RTP)
Answer: B

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NO.17 Data transfer is slow between the source and destination. The quality of service requested by the
transport layer in the OSI reference model is not being maintained. To fix this issue, at which layer should
the troubleshooting process begin?
A. presentation
B. session
C. transport
D. network
E. physical
Answer: D

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NO.18 Cisco Catalyst switches CAT1 and CAT2 have a connection between them using ports FA0/13. An 802.
1Q trunk is configured between the two switches. On CAT1, VLAN 10 is chosen as native, but on CAT2
the native VLAN is not specified.What will happen in this scenario?
A. 802.1Q giants frames could saturate the link.
B. VLAN 10 on CAT1 and VLAN 1 on CAT2 will send untagged frames.
C. A native VLAN mismatch error message will appear.
D. VLAN 10 on CAT1 and VLAN 1 on CAT2 will send tagged frames.
Answer: C

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NO.19 What must be set correctly when configuring a serial interface so that higher-level protocols calculate
the
best route?
A. bandwidth
B. delay
C. load
D. reliability
Answer: A

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NO.20 Workstation A has been assigned an IP address of 192.0.2.24/28. Workstation B has been assigned an
IP address of 192.0.2.100/28. The two workstations are connected with a straight-through cable. Attempts
to ping between the hosts are unsuccessful. What two things can be done to allow communications
between the hosts? (Choose two.)
A. Replace the straight-through cable with a crossover cable.
B. Change the subnet mask of the hosts to /25.
C. Change the subnet mask of the hosts to /26.
D. Change the address of Workstation A to 192.0.2.15.
E. Change the address of Workstation B to 192.0.2.111.
Answer: AB

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NO.21 Which layer in the OSI reference model is responsible for determining the availability of the receiving
program and checking to see if enough resources exist for that communication?
A. transport
B. network
C. presentation
D. session
E. application
Answer: E

Cisco   640-802   640-802

NO.22 Which command displays CPU utilization?
A. show protocols
B. show process
C. show system
D. show version
Answer: B

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NO.23 A network administrator must configure 200 switch ports to accept traffic from only the currently
attached host devices. What would be the most efficient way to configure MAC-level security on all these
ports?
A. Visually verify the MAC addresses and then telnet to the switches to enter the switchport-port security
mac-address command.
B. Have end users e-mail their MAC addresses. Telnet to the switch to enter the switchport-port security
mac-address command.
C. Use the switchport port-security MAC address sticky command on all the switch ports that have end
devices connected to them.
D. Use show mac-address-table to determine the addresses that are associated with each port and then
enter the commands on each switch for MAC address port-security.
Answer: C

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NO.24 Which command is used to see the path taken by packets across an IP network?
A. show ip route
B. show route
C. traceroute
D. trace ip route
Answer: C

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NO.25 The network default gateway applying to a host by DHCP is 192.168.5.33/28. Which option is the valid
IP address of this host?
A. 192.168.5.55
B. 192.168.5.47
C. 192.168.5.40
D. 192.168.5.32
E. 192.168.5.14
Answer: C

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NO.26 When configuring a serial interface on a router, what is the default encapsulation?
A. atm-dxi
B. frame-relay
C. hdlc
D. lapb
E. ppp
Answer: C

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NO.27 Which command would you configure globally on a Cisco router that would allow you to view directly
connected Cisco devices?
A. enable cdp
B. cdp enable
C. cdp run
D. run cdp
Answer: C

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NO.28 Which command is used to load a configuration from a TFTP server and merge the configuration into
RAM?
A. copy running-config: TFTP:
B. copy TFTP: running-config
C. copy TFTP: startup-config
D. copy startup-config: TFTP:
Answer: B

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NO.29 When troubleshooting a Frame Relay connection, what is the first step when performing a loopback
test?
A. Set the encapsulation of the interface to HDLC.
B. Place the CSU/DSU in local-loop mode.
C. Enable local-loop mode on the DCE Frame Relay router.
D. Verify that the encapsulation is set to Frame Relay.
Answer: A

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NO.30 If IP routing is enabled, which two commands set the gateway of last resort to the default gateway?
(Choose two.)
A. ip default-gateway 0.0.0.0
B. ip route 172.16.2.1 0.0.0.0 0.0.0.0
C. ip default-network 0.0.0.0
D. ip default-route 0.0.0.0 0.0.0.0 172.16.2.1
E. ip route 0.0.0.0 0.0.0.0 172.16.2.1
Answer: CE

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