640-911 | Accurate 640-911 Dumps Questions 2021
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Free demo questions for Cisco 640-911 Exam Dumps Below:
NEW QUESTION 1
What TCP/IP layer would handle UDP traffic flows?
- A. internetwork
- B. network interface
- C. transport
- D. physical
NEW QUESTION 2
You are designing a network that provides FCoE, FabricPath, OTV, and Layer 3 functionalities. Which device can perform these functionalities?
- A. Cisco Nexus 5500 Series Switches
- B. Cisco Nexus 7000 Series Switches
- C. Cisco Catalyst 6500 Series Switches
- D. Cisco ASR 1001 Router
NEW QUESTION 3
How many supervisor engines must a Cisco Nexus chassis contain to support the In- Service Software Update feature?
- A. 2
- B. 3
- C. 4
- D. 1
NEW QUESTION 4
Which three options represent a subnet mask that allows for 60 host addresses on a subnet? (Choose three.)
- A. /25
- B. 255.255.255.192
- C. /26
- D. 255.255.255.240
- E. 255.255.255.248
- F. /28
- G. /30
NEW QUESTION 5
A network engineer configures several VLANs using NX-OS and wants to save the changes. Which commands are used to save this configuration?
- A. write memory
- B. copy run start
- C. write terminal
- D. copy start run
NEW QUESTION 6
Which field in an Ethernet II frame performs the same function as the DSAP field in an
802.3 Ethernet frame?
- A. Start of frame
- B. EtherType
- C. Frame check sequence
- D. Subnetwork Access Protocol
- E. Logical Link Control
NEW QUESTION 7
What action does a switch take if the destination MAC address is unknown?
- A. Discard frame
- B. Send ICMP unreachable message to source
- C. Flood packet on all ports
- D. Compare destination IP address against an ACL to determine if it is permitted
- E. Send gratuitous ARP on all ports and wait for reply before forwarding
Explanation: "What happens though when the switch receives a frame with a destination MAC address that is not included in the table? In that case the switch will just broadcast/flood the frame with the unknown destination address to all of its ports (apart from the port where the frame came from). This process is called unknown unicast flooding. " http://telconotes.wordpress.com/2013/03/09/how-a-switch-works/
NEW QUESTION 8
NEW QUESTION 9
NEW QUESTION 10
On a new Cisco Nexus switch, you receive an error message when you attempt to create an SVI. What is the first command you must use to create the SVI?
- A. Interface vlan (vlan_id)
- B. Vlan (vlan_id)
- C. Feature svi
- D. Interface routed
==Configuring a Switched Virtual Interface (SVI)== feature interface-vlan
interface vlan 10
ip address 192.168.1.1./24 no shutdown
NEW QUESTION 11
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
NEW QUESTION 12
What is the function of the Tab key on the Cisco Nexus Operating System command-line interface?
- A. redisplays the current command line
- B. deletes all characters from the cursor to the end of the command line
- C. clears the terminal screen
- D. completes a partially entered command if enough characters are present
- E. moves the cursor one word to the right
Explanation: "Completes the word for you after entering the first characters of the word, and then pressing the Tab key. All options that match are presented." http://www.cisco.com/en/US/docs/switches/datacenter/sw/4_1/nx- os/fundamentals/configuration/guide/Cisco_Nexus_7000_Series_NX- OS_Fundamentals_Configuration_Guide Release_4.1_chapter4.html
NEW QUESTION 13
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
NEW QUESTION 14
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
NEW QUESTION 15
Which two addresses represent multicast addresses? (Choose two.)
- A. 126.96.36.199
- B. 240.100.22.3
- C. FF05::1
- D. 2001::1
NEW QUESTION 16
A router cannot forward packets to supernets. What are two causes of this problem? (Choose two.)
- A. The router is configured with Classless IP routing.
- B. The router is configured with Classfull IP routing.
- C. IP Classless command is not configured on the router.
- D. Only static routing is configured.
- E. Variable Length Subnet Mask is not used in choosing the IP addresses.
NEW QUESTION 17
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
Explanation: "While many of the changes leading to convergence are product releases and features, others are more symbolic. One of these symbolic changes is the rebranding, of Cisco® MDS 9000 SAN-OS Software as Cisco MDS 9000 NX-OS® Software effective with Release 4.1." http://www.cisco.com/en/US/prod/collateral/ps4159/ps6409/ps5989/ps9898/Rebranding_M DS_9000.html
NEW QUESTION 18
What two actions can be taken to enable inter-VLAN communications in the data center? (Choose two.)
- A. install a Layer 3 capable switch in the data center
- B. deploy a router as a Layer 3 services gateway attached inside each Layer 2 VLAN
- C. extend Layer 2 services to a Layer 3 capable VLAN using Layer 3 tunneling
- D. connect Layer 2 VLANs together with 802.1Q trunks
- E. use a routing protocol to direct packets into the Layer 2 network
NEW QUESTION 19
On which two components of a router can a copy of a running-configuration file be saved manually by an engineer for backup purposes? (Choose two.)
- A. NVRAM
- B. Flash
- C. ROM
- D. RAM
- E. DRAM
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