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Routing and switching > Switches Chapter 4 > Flashcards

Switches Chapter 4 Flashcards

1
Q

A network designer must provide a rationale to a customer for a design which will move an enterprise from a flat network topology to a hierarchical network topology. Which two features of the hierarchical design make it the better choice? (Choose two.)

lower bandwidth requirements
reduced cost for equipment and user training
easier to provide redundant links to ensure higher availability
less required equipment to provide the same performance levels
simpler deployment for additional switch equipment

A

easier to provide redundant links to ensure higher availability
simpler deployment for additional switch equipment

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2
Q

What is a collapsed core in a network design?

 a combination of the functionality of the access and distribution layers
 a combination of the functionality of the distribution and core layers
 a combination of the functionality of the access and core layers
 a combination of the functionality of the access, distribution, and core layers
A

a combination of the functionality of the distribution and core layers

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3
Q

What is a definition of a two-tier LAN network design?

 access and core layers collapsed into one tier, and the distribution layer on a separate tier
 access and distribution layers collapsed into one tier, and the core layer on a separate tier
 distribution and core layers collapsed into one tier, and the access layer on a separate tier
 access, distribution, and core layers collapsed into one tier, with a separate backbone layer
A

distribution and core layers collapsed into one tier, and the access layer on a separate tier

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4
Q

What is a basic function of the Cisco Borderless Architecture distribution layer?

 acting as a backbone
 aggregating all the campus blocks
 aggregating Layer 3 routing boundaries
 providing access to end user devices
A

aggregating Layer 3 routing boundaries

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5
Q

Which two previously independent technologies should a network administrator attempt to combine after choosing to upgrade to a converged network infrastructure? (Choose two.)

     user data traffic
     VoIP phone traffic
     scanners and printers
     mobile cell phone traffic
     electrical system
A

user data traffic

VoIP phone traffic

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6
Q

A local law firm is redesigning the company network so that all 20 employees can be connected to a LAN and to the Internet. The law firm would prefer a low cost and easy solution for the project. What type of switch should be selected?

     fixed configuration
     modular configuration
     stackable configuration
     StackPower
     StackWise
A

fixed configuration

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7
Q

What are two advantages of modular switches over fixed-configuration switches? (Choose two.)

     lower cost per switch
     increased scalability
     lower forwarding rates
     need for fewer power outlets
     availability of multiple ports for bandwidth aggregation
A

increased scalability

need for fewer power outlets

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8
Q

Which type of address does a switch use to build the MAC address table?

 destination IP address
 source IP address
 destination MAC address
 source MAC address
A

source MAC address

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9
Q

Which network device can be used to eliminate collisions on an Ethernet network?

 firewall
 hub
 router
 switch
A

switch

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10
Q

What two criteria are used by a Cisco LAN switch to decide how to forward Ethernet frames? (Choose two.)

     path cost
     egress port
     ingress port
     destination IP address
     destination MAC address
A

ingress port

destination MAC address

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11
Q

What is one function of a Layer 2 switch?

 forwards data based on logical addressing
 duplicates the electrical signal of each frame to every port
 learns the port assigned to a host by examining the destination MAC address
 determines which interface is used to forward a frame based on the destination MAC address
A

determines which interface is used to forward a frame based on the destination MAC address

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12
Q

A small publishing company has a network design such that when a broadcast is sent on the LAN, 200 devices receive the transmitted broadcast. How can the network administrator reduce the number of devices that receive broadcast traffic?

 Add more switches so that fewer devices are on a particular switch.
 Replace the switches with switches that have more ports per switch. This will allow more devices on a particular switch.
 Segment the LAN into smaller LANs and route between them.
 Replace at least half of the switches with hubs to reduce the size of the broadcast domain.
A

Segment the LAN into smaller LANs and route between them.

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13
Q

Which solution would help a college alleviate network congestion due to collisions?

 a firewall that connects to two Internet providers
 a high port density switch
 a router with two Ethernet ports
 a router with three Ethernet ports
A

a high port density switch

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14
Q

Which network device can serve as a boundary to divide a Layer 2 broadcast domain?

 router
 Ethernet bridge
 Ethernet hub
 access point
A

router

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15
Q

What is the destination address in the header of a broadcast frame?

 0.0.0.0
 255.255.255.255
 11-11-11-11-11-11
 FF-FF-FF-FF-FF-FF
A

FF-FF-FF-FF-FF-FF

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16
Q

Which statement describes a result after multiple Cisco LAN switches are interconnected?

 The broadcast domain expands to all switches.
 One collision domain exists per switch.
 Frame collisions increase on the segments connecting the switches.
 There is one broadcast domain and one collision domain per switch.
A

The broadcast domain expands to all switches.

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17
Q

What does the term “port density” represent for an Ethernet switch?

 the memory space that is allocated to each switch port
 the number of available ports
 the numbers of hosts that are connected to each switch port
 the speed of each port
A

the number of available ports

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18
Q

What are two reasons a network administrator would segment a network with a Layer 2 switch? (Choose two.)

     to create fewer collision domains
     to enhance user bandwidth
     to create more broadcast domains
     to eliminate virtual circuits
     to isolate traffic between segments
     to isolate ARP request messages from the rest of the network
A

to enhance user bandwidth

to isolate traffic between segments

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19
Q

What is a basic function of the Cisco Borderless Architecture distribution layer?

A

Aggregating layer 2 and layer 3 routing boundies

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20
Q

A network designer must provide a rational to a customer for a design that will move am enterprise from a flat network topology to a hierarchical network topology. Which 2 features of the hierarchical design make it the better choice Choose 2

A

Easier to provide redundant links to ensure higher availability

Simpler deployment for additional switch equipment

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21
Q

What is a collapsed core in a network design

A

A combination of the functionality of the Distribution and Core layers.

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22
Q

Which 2 previously independent technologies should a network administrator attempt to combine after choosing to upgrade to a converged network infrastructure. choose 2

A

User Data traffic

VoIP phone traffic

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23
Q

What is the definition of a 2 tiered LAN network design.

A

Distribution and core layers collapsed into 1 tier, and the access layer in a separate tier.

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24
Q

A local law firm is redesigned the company network so that all 20 employees can be connected to a LAN and to the Internet. The law firm would prefer a low cost and easy solution for the project. What type of switch should be selected?

A

Fixed Configuration

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25
Q

What are 2 advantages of modular switches over fixed configuration switches? choose 2

A

Increased Scalability

Need for fewer power outlets

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26
Q

What is one function of a layer 2 switch

A

Determines which interface is used to forward a frame on the destination MAC adress

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27
Q

What criteria are used by a Cisco LAN switch to decide how to forward Ethernet frames?

A

Destination MAC Adress

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28
Q

Which network device can be used to eliminate collisions on an Ethernet network?

A

Switch

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29
Q

Which type of address does a switch use to build the MAC address table?

A

Source MAC adress

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30
Q

What are 2 reasons a network administrator would segment a network with a layer 2 switch choose 2

A

To enhance user bandwidth

To isolate traffic between segments

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31
Q

Which statement describes the mircrosegmentation features of a LAN switch?

A

Each port forms a collision domain

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32
Q

A ______________ network is one that uses the same infrastructure to carry voice, data,and video signals

A

Converged

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33
Q

A network designer must provide a rationale to a customer for a design which will move an enterprise from a flat network topology to a hierarchical network topology. Which two features of the hierarchical design make it the better choice? (Choose two.)

A

easier to provide redundant links to ensure higher availability

simpler deployment for additional switch equipment

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34
Q

What is a collapsed core in a network design

A

a combination of the functionality of the distribution and core layers

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35
Q

What is a definition of a two-tier LAN network design?

A

distribution and core layers collapsed into one tier, and the access layer on a separate tier

How well did you know this?
1
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36
Q

What is a basic function of the Cisco Borderless Architecture distribution layer?

A

aggregating Layer 3 routing boundaries

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37
Q

Which two previously independent technologies should a network administrator attempt to combine after choosing to upgrade to a converged network infrastructure? (Choose two)

A

user data traffic

VoIP phone traffic

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38
Q

A local law firm is redesigning the company network so that all 20 employees can be connected to a LAN and to the Internet. The law firm would prefer a low cost and easy solution for the project. What type of switch should be selected?

A

fixed configuration

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39
Q

What are two advantages of modular switches over fixed-configuration switches? (Choose two.)

A

increased scalability

need for fewer power outlets

40
Q

Which type of address does a switch use to build the MAC address table?

A

source MAC address

41
Q

Which network device can be used to eliminate collisions on an Ethernet network?

A

switch

42
Q

What two criteria are used by a Cisco LAN switch to decide how to forward Ethernet frames? (Choose two.)

A

ingress port

destination MAC address

43
Q

What is one function of a Layer 2 switch?

A

determines which interface is used to forward a frame based on the destination MAC address.

44
Q

A small publishing company has a network design such that when a broadcast is sent on the LAN, 200 devices receive the transmitted broadcast. How can the network administrator reduce the number of devices that receive broadcast traffic?

A

Segment the LAN into smaller LANs and route between them.

45
Q

Which solution would help a college alleviate network congestion due to collisions?

A

a high port-density switch

46
Q

Which network device can serve as a boundary to divide a Layer 2 broadcast domain?

A

router

47
Q

What is the destination address in the header of a broadcast frame?

A

FF-FF-FF-FF-FF-FF

48
Q

What does the term “port density” represent for an Ethernet switch?

A

the number of available ports

49
Q

Which statement describes a result after multiple Cisco LAN switches are interconnected?

A

The broadcast domain expands to all switches.

50
Q

What are two reasons a network administrator would segment a network with a Layer 2 switch? (Choose two.)

A

to enhance user bandwidth

to isolate traffic between segments

51
Q

Fill in the blank. A ____________ network is one that uses the same infrastructure to carry voice, data, and video signals.

A

converged

52
Q

allows intelligent traffic load sharing by using all network resources

A

flexibility

53
Q

facilitates understanding the role of each device at every tier, simplifies deployment, operation, management, and reduces fault domains at every tier

A

hierarchical

54
Q

allows seamless network expansion and integrated service enablement on an on-demand basis

A

molecularity

55
Q

satisfies user expectations for keeping the network always on

A

resiliency

56
Q

represents the network edge provides network access to the user

A

access layer

57
Q

implements network access policy establishes Layer 3 routing boundaries

A

distribution layer

58
Q

provides high-speed backbone connectivity

functions as an aggregator for all the campus blocks

A

core layer

59
Q

appropriate for high performance computing applications forward process can begin after receiving the destination address may forward invalid frames

A

cut-through

60
Q

error checking before forwarding forwarding process only begins after receiving the entire frame only forwards valid frames

A

store-and-forward

61
Q

A switch has just been powered on) PC1 connects to port 1; PC2 connects to port 2) If PC1 sends data to PC2, how will the switch process the frame?
Question 1 options:

The switch forwards the frame based on the MAC address of PC2.
The switch adds the MAC address of PC1 (that is received on the ingress port) to the switch MAC address table.
The switch forwards the frame to all switch ports including ports 1 and 2.
The switch adds the IP address of PC2 (that is sent through the egress port) to the switch MAC address table.

A

The switch adds the MAC address of PC1 (that is received on the ingress port) to the switch MAC address table.

62
Q 
Layer-2 switching provides which of the following? (Choose four)
Question 2 options:
Hardware-based bridging (ASIC)
Wire speed
Low latency
Low cost
Routing
WAN Services
A

Hardware-based bridging (ASIC), Wire speed, Low latency, Low cost

63
Q

What function is most likely to be provided by a Cisco access layer switch?
Question 3 options:

PoE
Routing
Link aggregation
Fault isolation

A

PoE

64
Q

What connected end-user devices to networks before Layer-2 Switches?
Question 4 options:

Hubs
Routers
Firewalls
Duct Tape

A

HUBS

65
Q

Which command will display the forward/filter table on a Cisco switch?
Question 5 options:

Show mac filter
Show run
Show mac address-table
Show mac filter-table

A

Show mac address-table

66
Q

What are three benefits of a converged network? (Choose three.)
Question 6 options:

Voice and data support staff are combined.
Network design is simplified.
Network configuration is simplified.
Voice, video, and data traffic use one physical network.
Maintenance is simpler than hierarchical networks.
Network moves, adds, and changes are simplified.

A

Network configuration is simplified.
Voice, video, and data traffic use one physical network.
Maintenance is simpler than hierarchical networks.
WRONG
Network configuration is simplified.
Voice, video, and data traffic use one physical network.
Maintenance is simpler than hierarchical networks.
WRONG
Network design is simplified.
Voice, video, and data traffic use one physical network.
Maintenance is simpler than hierarchical networks.
WRONG
Network configuration is simplified.
Voice, video, and data traffic use one physical network.
Network moves, adds, and changes are simplified.
WRONG
Voice and data support staff are combined.
Network configuration is simplified.
Voice, video, and data traffic use one physical network.
WRONG
Voice and data support staff are combined.
Voice, video, and data traffic use one physical network.
Maintenance is simpler than hierarchical networks.

67
Q

If a switch receives a frame and the source MAC address is not in the MAC address table but the destination address is, what will the switch do with the frame?
Question 7 options:

Discard and send an error message
Flood the network with the frame
Add the source address and port to the MAC address table and forward the frame out the destination port
Add the destination MAC to the MAC address table and then forward the frame

A

Add the source address and port to the MAC address table and forward the frame out the destination port

68
Q

What are three distinct functions of layer-2 switching that increase available bandwidth on the network? (choose three.)
Question 8 options:

Address learning
Routing
Forwarding and filtering
Creating network loops
Loop avoidance
IP addressing
A

Address learning
Loop avoidance
Forwarding and filtering

69
Q

You have two switches connected together with two crossover cables for redundancy. STP is turned off. Which of the following will happen between the switches?
Question 9 options:

The routing tables on the switches will not update
The MAC forward/filter table will not update on the switch
Broadcast storms will occur on the switched network
The switches will automatically load-balance between the two links

A

Broadcast storms will occur on the switched network.

70
Q

A switch that uses MAC addresses to forward frames operates at which layer of the OSI model?
Question 10 options:

Layer 1
Layer 2
Layer 3
Layer 4

A

Layer 2

71
Q

Which is the fastest switching method?

a. Store-and-forward
b. Fragment-free
c. Cut-through
d. Forward-free

A

c. Cut-through

72
Q

There can be only one MAC address per port in a switching table.
True or False?

A

False

73
Q

Which of the following is considered a Layer 2 device?

a. Computer
b. Switch
c. Router
d. Hub

A

b. Switch

74
Q

You have two eight-port switches. On each switch, seven stations are connected to ports, and the two switches are connected with the eighth port. How many collisions domains are there?

a. 16
b. 15
c. 14
d. 8
e. 1

A

b. 15

75
Q

This switching method requires the switch to read the entire
frame into its buffers before forwarding it. It examines the frame check sequence (FCS)
field to be sure the frame contains no errors before it’s forwarded.

A

Store-And-Forward Switching

76
Q

A mode on a switch port that prevents the switch from forwarding frames
out the blocked port, thereby preventing a switching loop. See also switching loop.

A

Blocking Mode

77
Q

the switch looks at the destination hardware address and finds the exit interface in the MAC database

A

Forward/filter decisions

78
Q

Spanning Tree Protocol (STP) is used to stop network loops while still permitting redundancy

A

Loop avoidance

79
Q

The switch doesn’t transmit the frame out any interface except for the destination interface preserving bandwidth

A

frame filtering

80
Q

display which MAC addresses are associated with which port interface

A

show mac address-table

81
Q

the switches will flood broadcasts endlessly throughout the internet work

A

broadcast storm

82
Q

constantly updating the MAC filter table with source hardware address locations that it will fail to forward a frame

A

thrashing the MAC table

83
Q

the switch only waits for the destination hardware address to be received before it looks up the destination address in the MAC filter table

A

Cut-through (Fast Forward/Real-Time)

84
Q

the complete data frame is received on the switch’s buffer, a CRC is run, and if the CRC passes, the switch looks up the destination address in the MAC filter table

A

Store-and-Forward

85
Q

What are the three switch functions at layer 2?

A

Address learning, forward/filter decisions, loop avoidance

86
Q

If a frame is received on a switch port and the source MAC address is not in the forward/ filter table, what will the switch do?

A

It will add the source MAC address in the forward/filter table and associate it with the port the frame was received on

87
Q

What is used at layer 2 to prevent switching loops?

A

Spanning Tree Protocol (STP)

88
Q

Which LAN switch method receives the complete frame before beginning to forward it?

A

Store-and-forward

89
Q

Switches break up ___________________ domains

A

Collision

90
Q

What is used to prevent switching loops in a network with redundant switched paths?

A

Spanning Tree Protocol (STP)

91
Q

What are the three distinct functions of layer 2 switching that increase available bandwidth on the network?

A

address learning, forwarding and filtering of the network, and loop avoidance

92
Q

Which of the following is true regarding layer 2 switches? (Choose two.)

A

A switch is a multiport bridge & Switches learn MAC addresses by examining the source address of each frame.

93
Q

What does a switch do when a frame is received on an interface and the destination hardware address is unknown or not in the filter table?

A

Floods the network with the frame looking for the device

94
Q

If a switch receives a frame and the source MAC address is not in the MAC address table, but the destination address is in the table, what will the switch do with the frame?

A

Add the source address and port to the MAC address table and forward the frame out the destination port.

95
Q

Which of the following is a characteristic of having a network segment on a switch?

A

One device per segment can send frames to the switch at a time.

96
Q

Layer 2 switching provides which of the following? (Choose four.)

A

Hardware-based bridging (ASIC), Wire speed, Low latency, Low cost

Routing and switching (12 decks)

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