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2016 NEW Cisco 640-911: Introducing
Cisco Data Center Networking (DCICN)
Exam Questions and Answers
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QUESTION 11
What are three reasons to migrate from IPv4 to IPv6? (Choose three.)
A.
B.
C.
D.
E.

IPv6 eliminates the requirement for NAT.
IPv6 includes enough IP addresses to allocate more than four billion IP addresses to every person on earth.
IPv6 eliminates the need for VLANs.
Hosts can be assigned an IP address without DHCP.
Hosts can be assigned an IP address without DNS.

Answer: ABD
Explanation:
"IPv6 address contains 32 characters vs. 12 in IPv4.
This will grant no ip address translation and dynamic changes. We will even don't need NAT! "
http://www.ipv6.ru/english/history/goipv6.php
" IPv6 uses a 128-bit address, allowing 2128, or approximately 3.4?038 addresses, or more than
7.9?028 times as many as IPv4, which uses 32-bit addresse";
http://en.wikipedia.org/wiki/IPv6
QUESTION 12
Which two options describe services that are provided by TCP? (Choose two.)
A.
B.
C.
D.

session multiplexing
EtherTypes identify destination services
connection-oriented
best-effort packet delivery

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E. binary translation
Answer: AC
Explanation:
"TCP is a connection-oriented protocol."
http://www.diffen.com/difference/ TCP _vs_UDP
QUESTION 13
Which two options describe services that are provided by UDP? (Choose two.)
A.
B.
C.
D.
E.

session multiplexing
segmentation
connection-oriented
reliable packet delivery
best-effort packet delivery

Answer: AE
Explanation:
"UDP is faster because there is no error-checking for packets."
http://www.diffen.com/difference/ TCP _vs_UDP
QUESTION 14
Which two options represent a subnet mask that allows for a maximum of 14 available host
addresses on a subnet? (Choose two.)
A.
B.
C.
D.
E.
F.
G.
H.

255.255.255.240
255.255.255.192
255.255.240.0
255.255.192.0
/14
/21
/26
/28

Answer: AH
Explanation:
Example:
Address: 192.168.1.1
Bitmask: 28
Netmask: 255.255.255.240
Network: 192.168.1.0
HostMin: 192.168.1.1
HostMax: 192.168.1.14
Broadcast: 192.168.1.15
Hosts: 16
QUESTION 15
What is the binary value of the hexadecimal number 0x511?

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A.
B.
C.
D.
E.

10100011001
10101010101
10110010001
10100010001
10100110011

Answer: D
Explanation:
Decimal 1297
Binary 10100010001
Hexadecimal 0x511
Roman MCCXCVII
Dotted decimal 0.0.5.17
QUESTION 16
What is the binary value of the decimal number 1263?
A.
B.
C.
D.
E.

11011101101
10011101111
10011101011
11010001111
10111101111

Answer: B
Explanation:
Decimal 1263
Binary 10011101111
Hexadecimal 0x4ef
Roman MCCLXIII
Dotted decimal 0.0.4.239
QUESTION 17
What are three modular Layer 2 processes in Cisco Nexus Operating System? (Choose three.)
A.
B.
C.
D.
E.
F.

UDLD
PIM
HSRP
STP
Cisco Discovery Protocol
OSPF

Answer: ADE
Explanation:
"PIM is IP routing protocol-independent and can leverage whichever unicast routing protocols are
used to populate the unicast routing table, including Enhanced Interior Gateway Routing Protocol
(EIGRP), Open Shortest Path First (OSPF), Border Gateway Protocol (BGP), and static routes.
PIM uses this unicast routing information to perform the multicast forwarding function. Although
PIM is called a multicast routing protocol, it actually uses the unicast routing table to perform the
RPF check function instead of building up a completely independent multicast routing table.

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Unlike other routing protocols, PIM does not send and receive routing updates between routers."
http://www.cisco.com/en/US/docs/ios/solutions_docs/ip_multicast/White_papers/mcst_ovr.html#w
p1009068
"Hot Standby Router Protocol (HSRP) is a Cisco proprietary redundancy protocol for establishing
a faulttolerant default gateway.
In the configuration procedures, the specified interface must be a Layer 3 interface:"
http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/ 12.2_55_se/configu
ration/guide/swhsrp.html
OSPF (Open Shortest Path First) - routing protocol.
QUESTION 18
What are three modular Layer 3 processes in Cisco Nexus Operating System? (Choose three.)
A.
B.
C.
D.
E.
F.

UDLD
PIM
HSRP
STP
OSPF
Cisco Discovery Protocol

Answer: BCE
Explanation:
"PIM is IP routing protocol-independent and can leverage whichever unicast routing protocols are
used to populate the unicast routing table, including Enhanced Interior Gateway Routing Protocol
(EIGRP), Open Shortest Path First (OSPF), Border Gateway Protocol (BGP), and stat ic routes.
PIM uses this unicast routing information to perform the multicast forwarding function. Although
PIM is called a multicast routing protocol, it actually uses the unicast routing table to perform the
RPF check function instead of building up a completely independent multicast routing table.
Unlike other routing protocols, PIM does not send and receive routing updates between routers."
http://www.cisco.com/en/US/docs/ios/solutions_docs/ip_multicast/White_papers/mcst_ovr.html#w
p1009068
"Hot Standby Router Protocol (HSRP) is a Cisco proprietary redundancy protocol for establishing
a fault tolerant default gateway.
In the configuration procedures, the specified interface must be a Layer 3 interface:"
http://www.cisco.com/en/US/docs/switches/lan/cataly st3750/software/release/ 12.2_55_se/configu
ration/guide/swhsrp.html
OSPF (Open Shortest Path First) - routing protocol.
QUESTION 19
What are two default user roles in Cisco Nexus Operating System? (Choose two.)
A.
B.
C.
D.
E.
F.

Admin
Network Operator
Operator
Storage Operator
Root
System Manager

Answer: AB

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Explanation:
"The Nexus 5000 Series switch provides the following default user roles:
Network-admin (superuser)--Complet e read and write access to the entire Nexus 5000 Series
switch.
Network-operator--Complete read access to the Nexus 5000 Series switch."
http://www.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli_rel_
4_0_1a/sec_rbac.html#wp1230629
QUESTION 20
On most keyboards, the Up arrow and Down arrow keys move through the command history.
Which two key sequences can be used as alternatives? (Choose two.)
A.
B.
C.
D.
E.

Alt-A
Alt-F
Alt-N
Alt-E
Alt-P

Answer: CE
Explanation:
"Alt-P History search backwards
Alt-N History search forwards"
http://www.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli_rel_
4_0_1a/begin.html

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