Download Cisco 640-911 Exams,640-911 PDF Dumps – Free try

QUESTION 1
Which two networking devices operate at Layer 1 of the OSI model? (Choose two.)
A. Repeater
B. Bridge
C. Switch
D. Router
E. Hub
Correct Answer: AE

QUESTION 2
Which two networking devices forward data based on destination MAC address? (Choose two.)
A. Repeater
B. Bridge
C. Switch
D. Router
E. Hub
Correct Answer: BC

QUESTION 3
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
Correct Answer: CD

QUESTION 4
Which device would you select to partition a network into VLANs?
A. repeater
B. bridge
C. switch
D. router
E. hub
Correct Answer: C

QUESTION 5
At which layer of the OSI model does TCP operate?
A. 1
B. 2
C. 3
D. 4
E. 5
Correct Answer: D

QUESTION 6
Which two layers of the OSI model relate to the transmission of bits over the wire and packet forwarding
based on destination IP address? (Choose two.)
A. 1
B. 2
C. 3
D. 4
E. 5
Correct Answer: AC

QUESTION 7
Which layer of the OSI model is associated with the reliable transmission of datagrams?
A. Datagram
B. Routing
C. Network
D. Data link
E. Transport
F. Transmission
G. Session
Correct Answer: E

QUESTION 8
Which three terms are used to describe data at Layers 1, 2, and 4 of the OSI model? (Choose three.)
A. PDUs
B. Bits
C. Sequences
D. Segments
E. Packets
F. Frames
Correct Answer: BDF

QUESTION 9
Which two layers of the OSI model are combined in the Internet protocol suite application layer? (Choose
two.)
A. 2
B. 3
C. 4
D. 5
E. 6
F. 7
Correct Answer: DE

QUESTION 10
Which two layers of the OSI model are combined in the Internet protocol suite network access layer?
(Choose two.)
A. 1
B. 2C. 3
D. 4
E. 5
F. 6
G. 7
Correct Answer: AB

QUESTION 11
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.
Correct Answer: D

QUESTION 12
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
Correct Answer: B

QUESTION 13
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
Correct Answer: BE

QUESTION 14
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.
Correct Answer: BCE

QUESTION 15
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
Correct Answer: C

QUESTION 16
Which statement describes the purpose of the MAC address forwarding table of a switch?
A. The switch consults the forwarding table to determine the best route to a destination.
B. The switch consults the forwarding table to determine the output port.
C. The switch consults the forwarding table to determine if the packet is routable.
D. The switch consults the forwarding table to determine if access control permits the packet.
Correct Answer: B

QUESTION 17
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.
Correct Answer: BE

QUESTION 18
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.
Correct Answer: BCDF

QUESTION 19
Which command displays the Trunking Native Mode VLAN on port Ethernet 1/18?
A. show running-config switchport e1/18
B. show running-config e1/18 switchport
C. show interface e1/18
D. show interface e1/18 switchport
E. show interface e1/18 native
Correct Answer: D
QUESTION 20

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