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Introducing Cisco Data Center Networking - DCICN Certification Exam

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November 23, 2024Last update

Cisco 640-911 Free Practice Questions

Q1. What is the subnet mask for the network 172.16.0.0/21? 

A. 255.255.0.0 

B. 255.255.255.240 

C. 255.255.248.0 

D. 255.255.255.248 

E. 255.255.248.240 

F. 255.255.255.0 

Answer: C

Q2. What is the dotted hexadecimal representation of the IP address 172.13.99.225? 

A. AC.0D.63.E1 

B. AB.63.99.D5 

C. E2.1D.E1.66 

D. BC.0C.C3.1F 

E. CC.0D.F3.21 

Answer: A

Q3. Where does Cisco Nexus Operating System store the running configuration file? 

A. RAM 

B. flash 

C. bootflash 

D. volatile 

E. NVRAM 

Answer: A

Q4. Which two network topologies are the most popular in switching? (Choose two.) 

A. bus 

B. token passing bus 

C. star 

D. extended star 

E. ring 

Answer: CD

Q5. Which two commands would you use to erase the Cisco Nexus Operation System configuration and return the switch to factory defaults? (Choose two.) 

A. nexus# write erase boot 

B. nexus# erase configuration 

C. nexus# erase running-configuration 

D. nexus# erase startup-configuration 

E. nexus# reboot 

F. nexus# reload 

G. nexus# shutdown 

Answer: AF

Q6. What is the correct format of an access control list on a Cisco Nexus switch to only permit unencrypted Web traffic from the 172.16.1.0/25 network to destination host 10.10.1.110? 

A. N5K-A(config)# ip access-list 101 N5K-A(config-acl)# permit tcp host 172.16.1.0/25 any eq 80 

B. N5K-A(config)# ip access-list 101 N5K-A(config-acl)# permit tcp 172.16.1.0 255.255.255.128 any eq 80 

C. N5K-A(config)# ip access-list 101 N5K-A(config-acl)# permit tcp 172.16.1.0/25 any eq 80 

D. N5K-A(config)#access-list 101 permit tcp 172.16.1.0/25 0.0.0.128 eq 80 

E. N5K-A(config)# ip access-list 101 N5K-A(config-acl)# permit tcp any 172.16.1.0 255.255.248.0 eq 80 

Answer: C

Q7. What are two advantages of employing an external router for inter-VLAN routing over an IEEE 802.1Q trunk link? (Choose two.) 

A. Layer 3 functionality is not required on the switch. 

B. The router facilitates communication between VLANs. 

C. The single traffic path is optimized. 

D. Latency is reduced as packets leave the switch. 

E. Equal-Cost Multipath is supported. 

Answer: AB

Q8. When deploying 10BASE-2 Ethernet, which type of connector is used? 

A. AUI 

B. UTP 

C. STP 

D. BNC 

E. RJ-11 

F. RJ-45 

G. ST 

H. DC 

Answer: D

Q9. Which two layers of the OSI model are combined in the Internet protocol suite network access layer? (Choose two.) 

A. 1 

B. 2 

C. 3 

D. 4 

E. 5 

F. 6 

G. 7 

Answer: AB

Q10. Which two networking devices operate at Layer 1 of the OSI model? (Choose two.) 

A. repeater 

B. bridge 

C. switch 

D. router 

E. hub 

Answer: AE

Q11. In an IEEE 802.3 Ethernet frame, what is the significance of the DSAP field? 

A. The DSAP field specifies the TCP or UDP port that is associated with the transport protocol. 

B. The DSAP field is only used on United States Department of Defense networks to indicate the information classification level. 

C. The DSAP field is only used in Ethernet II frames. 

D. The DSAP field indicates the network layer protocol. 

Answer: D

Q12. Which four statements indicate unique properties of VLAN 1 on Cisco Nexus switches? (Choose four.) 

A. VLAN 1 is used to flood multicast traffic. 

B. VLAN 1 cannot be deleted. 

C. VLAN 1 is used for Cisco Discovery Protocol. 

D. VLAN 1 is used for VTP advertisements. 

E. VLAN 1 defines a collision domain. 

F. VLAN 1 defines a broadcast domain. 

Answer: BCDF

Q13. What is the binary value of the hexadecimal number 0x511? 

A. 10100011001 

B. 10101010101 

C. 10110010001 

D. 10100010001 

E. 10100110011 

Answer: D

Q14. Which version of Cisco Nexus Operating System became a common operating system for Cisco Nexus switches and Cisco MDS storage switches? 

A. 2.7 

B. 3.3 

C. 3.9 

D. 4.1 

E. 5.01GD 

F. 6.2 

Answer: D

Q15. Which device would you select to partition a network into VLANs? 

A. repeater 

B. bridge 

C. switch 

D. router 

E. hub 

Answer: C

Q16. Which option is an example of a link-state routing protocol? 

A. EIGRP 

B. RIP 

C. OSPF 

D. ARP 

Answer: C

Q17. What does RIPv1 send to its neighbors? 

A. information about changed routes 

B. information about new routes 

C. the entire routing table 

D. information about deleted routes 

Answer: C

Q18. What are two attributes of a VLAN? (Choose two.) 

A. A VLAN defines a collision domain. 

B. A VLAN defines a broadcast domain. 

C. Broadcasts are flooded to all VLANs. 

D. Collisions are flooded to all VLANs. 

E. A Layer 3 device is required to route packets between VLANs. 

F. A Layer 2 device is required to route packets between VLANs. 

Answer: BE

Q19. What are three reasons to migrate from IPv4 to IPv6? (Choose three.) 

A. IPv6 eliminates the requirement for NAT. 

B. IPv6 includes enough IP addresses to allocate more than four billion IP addresses to every person on earth. 

C. IPv6 eliminates the need for VLANs. 

D. Hosts can be assigned an IP address without DHCP. 

E. Hosts can be assigned an IP address without DNS. 

Answer: ABD

Q20. Which option would you use to exit the Cisco Nexus Operating System interface configuration mode and return to the exec prompt? 

A. nexus(config-if)#Ctrl-C nexus# 

B. nexus(config-if)#Ctrl-Z nexus# 

C. nexus(config-if)#Ctrl-E nexus# 

D. nexus(config-if)#exit nexus# 

Answer: A

Q21. What are three reasons that switches supersede bridges? (Choose three.) 

A. Smaller frame buffers decrease latency. 

B. Forward, filter, or flood frames. 

C. Multiple simultaneous communications between ports. 

D. Larger inspection engine allows for higher throughput. 

E. Switches have many ports. 

Answer: BCE

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