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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. How many IP address ranges are specified in RFC 1918? 

A. 1 in Class A, 2 in Class B, and 4 in Class C 

B. 2 in Class A, 4 in Class B, and 8 in Class C 

C. 4 in Class A, 8 in Class B, and 16 in Class C 

D. 1 in Class A, 16 in Class B, and 256 in Class C 

Answer: D

Q2. 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

Q3. 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

Q4. What is the maximum allowable hop count for RIPv1? 

A. 4 

B. 8 

C. 12 

D. 15 

E. 16 

Answer: D

Q5. 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

Q6. 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

Q7. Which statement correctly describes an SVI? 

A. An SVI is a Layer 2 interface and uses a dynamic MAC address. 

B. An SVI cannot have an IP address assigned to it. 

C. An SVI provides Layer 3 routing between VLANs. 

D. Each switch port requires an SVI assignment. 

Answer: C

Q8. Which two options represent a subnet mask that allows for a maximum of 14 available host addresses on a subnet? (Choose two.) 

A. 255.255.255.240 

B. 255.255.255.192 

C. 255.255.240.0 

D. 255.255.192.0 

E. /14 

F. /21 

G. /26 

H. /28 

Answer: AH

Q9. Which two options describe services that are provided by TCP? (Choose two.) 

A. session multiplexing 

B. EtherTypes identify destination services 

C. connection-oriented 

D. best-effort packet delivery 

E. binary translation 

Answer: AC

Q10. 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

Q11. Which transport protocol requires a three-way handshake to establish a new connection? 

A. ARP 

B. UDP 

C. IP 

D. TCP 

Answer: D

Q12. What is the correct format of an access control list on a Cisco Nexus switch to deny FTP traffic from any source to destination host 10.10.1.110? 

A. N5K-A(config)# ip access-list 101 N5K-A(config-acl)# deny tcp any host 10.10.1.110 eq ftp 

B. N5K-A(config)#access-list 101deny tcp any host 10.10.1.110 eq ftp 

C. N5K-A(config)#access-list 101deny tcp any host 10.10.1.110 eq ftp N5K-A(config)#access-list 101denyip any any 

D. N5K-A(config)# ip access-list 101 N5K-A(config-acl)# denyudp any host 10.10.1.110 eq 21 N5K-A(config-acl)# permit ip any any 

E. N5K-A(config)# ip access-list 101 N5K-A(config-acl)# deny tcp any host 10.10.1.110 eq 21 N5K-A(config-acl)# permit ip any any 

Answer: E

Q13. 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

Q14. 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

Q15. What is the binary value of the decimal number 1263? 

A. 11011101101 

B. 10011101111 

C. 10011101011 

D. 11010001111 

E. 10111101111 

Answer: B

Q16. 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

Q17. Which three statements are true concerning RFC 1918 IP addresses? (Choose three.) 

A. They are globally routable. 

B. They are not globally routable. 

C. They must not be filtered at Internet border interfaces. 

D. They should be filtered at Internet border interfaces. 

E. They include 10.0.0.0/8, 172.16.0.0/16, and 192.168.1.0/24. 

F. They include 10.0.0.0/8, 172.16.0.0/21, and 192.168.0.0/16. 

Answer: BDF

Q18. Which two statements describe the purpose of RFC 1918? (Choose two.) 

A. Establish a range of IP addresses that are dedicated to the growing use of multicast video. 

B. Establish a range of IP addresses that are dedicated to the growing use of peer-to-peer file-sharing applications. 

C. Establish a range of IP addresses that are dedicated to use on internal networks. 

D. Establish a range of IP addresses to address the shrinking pool of globally routable addresses. 

E. Delay the transition to IPv6. 

Answer: CD

Q19. At which layer of the OSI model does TCP operate? 

A. 1 

B. 2 

C. 3 

D. 4 

E. 5 

Answer: D

Q20. What are two features of a bridge? (Choose two.) 

A. reliable transmission 

B. operate at OSI Layer 2 

C. operate at OSI Layer 3 

D. create multiple broadcast domains 

E. create multiple collision domains 

F. flood input packets to all ports 

G. drop IP packets with invalid destination ports 

Answer: BE

Q21. What is the Cisco Nexus Operating System command to define a port as a Layer 3 port? 

A. port routed 

B. no switchport 

C. l3 switchport 

D. port switching off 

Answer: B

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