12 07 2017

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QUESTION 89
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

Answer: C
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/

QUESTION 90
A network administrator is tasked with creating a switched virtual interface for VLAN 100 on a new Cisco Nexus switch. Which two commands does the network administrator need? (Choose two.)

A.    feature interface-vlan
B.    interface vlan 100
C.    feature private-vlan
D.    interface 100
E.    interface mgmt 100

Answer: AB

QUESTION 91
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.

Answer: B

QUESTION 92
Which two networking devices operate at Layer 1 of the OSI model? (Choose two.)

A.    Repeater
B.    Bridge
C.    Switch
D.    Router
E.    Hub

Answer: AE
Explanation:
It defines the electrical and physical specifications of the data connection. It defines the relationship between a device and a physical transmission medium (e.g. a copper or fiber optical cable). This includes the layout of pins, voltages, line impedance, cable specifications, signal timing, hubs, repeaters, network adapters, host bus adapters (HBA used in storage area networks) and more.”
http://en.wikipedia.org/wiki/OSI_model

QUESTION 93
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

Answer: DE
Explanation:
http://en.wikipedia.org/wiki/Internet_protocol_suite

QUESTION 94
Which process does a Cisco router perform immediately upon powering up?

A.    POST
B.    BIOS
C.    booting from NVRAM
D.    booting from ROM

Answer: A

QUESTION 95
Which three attributes can be configured when creating a new user account on a Cisco Nexus 5000 Series Switch? (Choose three.)

A.    username
B.    password
C.    expiry date
D.    access list
E.    role feature
F.    authentication server

Answer: ABC

QUESTION 96
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
Explanation:
“- a bridge is a two interfaces device that creates 2 collision domains, since it forwards the traffic it receives from one interface only to the interface where the destination layer 2 device (based on his mac address) is connected to. A bridge is considered as an “intelligent hub” since it reads the destination mac address in order to forward the traffic only to the interface where it is connected”
https://learningnetwork.cisco.com/thread/1734

QUESTION 97
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

QUESTION 98
Refer to the exhibit. What two commands will allow the Nexus 5000 switch to continue to boot? (Choose two.)
 

A.    boot n5000-uk9-kickstart.5.2.1.N1.4.bin
B.    load n5000-uk9.5.2.1.N1.4.bin
C.    copy kickstart-latest n5000-uk9-kickstart.5.2.1.N1.4.bin startup
D.    copy system-latest n5000-uk9.5.2.1.N1.4.bin
E.    boot n5000-uk9.5.2.1.N1.4.bin admin-password Cisco123
F.    load n5000-uk9-kickstart.5.2.1.N1.4.bin

Answer: AB

QUESTION 99
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

Answer: D
Explanation:
NX# show interface e1/18 switchport
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Trunking VLANs Allowed: 1-4094
Voice VLAN: none

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