10 08 2015

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Vendor: Cisco
Exam Code: 640-911
Exam Name: Introducing Cisco Data Center Networking (DCICN)

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QUESTION 136
An engineer replaces multiple hubs in the network with Layer 2 switches. What are two effects on the performance of the network? (Choose two.)

A.    reduced number of frame collisions
B.    multiple devices can transmit and receive frames simultaneously
C.    reduced broadcast packet propagation
D.    reduced complexity in monitoring traffic within the Layer 2 domain
E.    reduced number of packet collisions

Answer: AB

QUESTION 137
Refer to the exhibit. If switch SW2 was replaced with a router, which two effects would it have on the network? (Choose two.)
 

A.    reduce the number of collision domains
B.    increase the number of broadcast domains
C.    increase the number of collision domains
D.    reduce the number of broadcast domains
E.    no change in collision domains

Answer: BE

QUESTION 138
A network engineer has multiple network devices to choose from to connect 10 PCs to a network. Requirements include that packet collisions are minimized for each client and that the physical network topology must be highly scalable. Which two connectivity options should the engineer use? (Choose two.)

A.    Connect each of the 10 client PCs to a network switch.
B.    Use a star physical network topology.
C.    Connect each of the 10 client PCs to a network router.
D.    Connect each of the 10 client PCs to a network hub.
E.    Use a ring physical network topology.
F.    Use a mesh physical network topology.

Answer: AB

QUESTION 139
Which protocol operates at Layer 3 of OSI model and is used for host addressing?

A.    TCP
B.    UDP
C.    IP
D.    RIP
E.    OSPF

Answer: C

QUESTION 140
After a firewall is installed in the network, users have lost FTP access to the remote Cisco Nexus switches, but the TFTP access still works. Which protocol is blocked by the firewall?

A.    UDP
B.    TCP
C.    IP
D.    ICMP
E.    RIP

Answer: B

QUESTION 141
A network operations team needs to monitor the health of Cisco Nexus switches. Which type of UDP-based protocol should be configured on these devices for management and monitoring?

A.    SSH
B.    TELNET
C.    FTP
D.    SNMP
E.    SMTP

Answer: D

QUESTION 142
Which protocol is supported when OSPFv2 is used as the routing protocol?

A.    IPv6
B.    IPv4
C.    UDP
D.    TCP

Answer: B

QUESTION 143
What is the maximum distance for 100Base-TX?

A.    10m
B.    100m
C.    400m
D.    500m

Answer: B

QUESTION 144
What is the result when two data transmissions are sent at the same time?

A.    A collision occurs and both devices stop transmission and back off.
B.    A collision occurs and one device retransmits.
C.    All traffic continues to transmit.
D.    A collision occurs and both devices resend transmissions.

Answer: A

QUESTION 145
There is a large amount of traffic inside a network segment with a destination address of
FF:FF:FF:FF:FF:FF. What type of traffic uses this address?

A.    FF:FF:FF:FF:FF:FF is the Layer 2 broadcast address.
B.    FF:FF:FF:FF:FF:FF is the Layer 2 network address.
C.    FF:FF:FF:FF:FF:FF is the Layer 3 broadcast address.
D.    FF:FF:FF:FF:FF:FF is the Layer 3 network address.
E.    FF:FF:FF:FF:FF:FF is multicast traffic.

Answer: A

QUESTION 146
What two commands are used to modify the MAC Table? (Choose two.)

A.    no mac-address-table static
B.    show address-table
C.    mac-address-table aging
D.    show mac-address-table
E.    address-table static

Answer: AC

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