Switches Chapter 4 Flashcards
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
easier to provide redundant links to ensure higher availability
simpler deployment for additional switch equipment
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 combination of the functionality of the distribution and core layers
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
distribution and core layers collapsed into one tier, and the access layer on a separate tier
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
aggregating Layer 3 routing boundaries
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
user data traffic
VoIP phone traffic
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
fixed configuration
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
increased scalability
need for fewer power outlets
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
source MAC address
Which network device can be used to eliminate collisions on an Ethernet network?
firewall hub router switch
switch
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
ingress port
destination MAC address
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
determines which interface is used to forward a frame based on the destination MAC address
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.
Segment the LAN into smaller LANs and route between them.
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 high port density switch
Which network device can serve as a boundary to divide a Layer 2 broadcast domain?
router Ethernet bridge Ethernet hub access point
router
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
FF-FF-FF-FF-FF-FF
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.
The broadcast domain expands to all switches.
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
the number of available ports
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
to enhance user bandwidth
to isolate traffic between segments
What is a basic function of the Cisco Borderless Architecture distribution layer?
Aggregating layer 2 and layer 3 routing boundies
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
Easier to provide redundant links to ensure higher availability
Simpler deployment for additional switch equipment
What is a collapsed core in a network design
A combination of the functionality of the Distribution and Core layers.
Which 2 previously independent technologies should a network administrator attempt to combine after choosing to upgrade to a converged network infrastructure. choose 2
User Data traffic
VoIP phone traffic
What is the definition of a 2 tiered LAN network design.
Distribution and core layers collapsed into 1 tier, and the access layer in a separate tier.
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?
Fixed Configuration
What are 2 advantages of modular switches over fixed configuration switches? choose 2
Increased Scalability
Need for fewer power outlets
What is one function of a layer 2 switch
Determines which interface is used to forward a frame on the destination MAC adress
What criteria are used by a Cisco LAN switch to decide how to forward Ethernet frames?
Destination MAC Adress
Which network device can be used to eliminate collisions on an Ethernet network?
Switch
Which type of address does a switch use to build the MAC address table?
Source MAC adress
What are 2 reasons a network administrator would segment a network with a layer 2 switch choose 2
To enhance user bandwidth
To isolate traffic between segments
Which statement describes the mircrosegmentation features of a LAN switch?
Each port forms a collision domain
A ______________ network is one that uses the same infrastructure to carry voice, data,and video signals
Converged
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.)
easier to provide redundant links to ensure higher availability
simpler deployment for additional switch equipment
What is a collapsed core in a network design
a combination of the functionality of the distribution and core layers
What is a definition of a two-tier LAN network design?
distribution and core layers collapsed into one tier, and the access layer on a separate tier
What is a basic function of the Cisco Borderless Architecture distribution layer?
aggregating Layer 3 routing boundaries
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
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
What are two advantages of modular switches over fixed-configuration switches? (Choose two.)
increased scalability
need for fewer power outlets
Which type of address does a switch use to build the MAC address table?
source MAC address
Which network device can be used to eliminate collisions on an Ethernet network?
switch
What two criteria are used by a Cisco LAN switch to decide how to forward Ethernet frames? (Choose two.)
ingress port
destination MAC address
What is one function of a Layer 2 switch?
determines which interface is used to forward a frame based on the destination MAC address.
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?
Segment the LAN into smaller LANs and route between them.
Which solution would help a college alleviate network congestion due to collisions?
a high port-density switch
Which network device can serve as a boundary to divide a Layer 2 broadcast domain?
router
What is the destination address in the header of a broadcast frame?
FF-FF-FF-FF-FF-FF
What does the term “port density” represent for an Ethernet switch?
the number of available ports
Which statement describes a result after multiple Cisco LAN switches are interconnected?
The broadcast domain expands to all switches.
What are two reasons a network administrator would segment a network with a Layer 2 switch? (Choose two.)
to enhance user bandwidth
to isolate traffic between segments
Fill in the blank. A ____________ network is one that uses the same infrastructure to carry voice, data, and video signals.
converged
allows intelligent traffic load sharing by using all network resources
flexibility
facilitates understanding the role of each device at every tier, simplifies deployment, operation, management, and reduces fault domains at every tier
hierarchical
allows seamless network expansion and integrated service enablement on an on-demand basis
molecularity
satisfies user expectations for keeping the network always on
resiliency
represents the network edge provides network access to the user
access layer
implements network access policy establishes Layer 3 routing boundaries
distribution layer
provides high-speed backbone connectivity
functions as an aggregator for all the campus blocks
core layer
appropriate for high performance computing applications forward process can begin after receiving the destination address may forward invalid frames
cut-through
error checking before forwarding forwarding process only begins after receiving the entire frame only forwards valid frames
store-and-forward
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.
The switch adds the MAC address of PC1 (that is received on the ingress port) to the switch MAC address table.
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
Hardware-based bridging (ASIC), Wire speed, Low latency, Low cost
What function is most likely to be provided by a Cisco access layer switch?
Question 3 options:
PoE
Routing
Link aggregation
Fault isolation
PoE
What connected end-user devices to networks before Layer-2 Switches?
Question 4 options:
Hubs
Routers
Firewalls
Duct Tape
HUBS
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
Show mac address-table
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.
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.
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
Add the source address and port to the MAC address table and forward the frame out the destination port
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
Address learning
Loop avoidance
Forwarding and filtering
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
Broadcast storms will occur on the switched network.
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
Layer 2
Which is the fastest switching method?
a. Store-and-forward
b. Fragment-free
c. Cut-through
d. Forward-free
c. Cut-through
There can be only one MAC address per port in a switching table.
True or False?
False
Which of the following is considered a Layer 2 device?
a. Computer
b. Switch
c. Router
d. Hub
b. Switch
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
b. 15
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.
Store-And-Forward Switching
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.
Blocking Mode
the switch looks at the destination hardware address and finds the exit interface in the MAC database
Forward/filter decisions
Spanning Tree Protocol (STP) is used to stop network loops while still permitting redundancy
Loop avoidance
The switch doesn’t transmit the frame out any interface except for the destination interface preserving bandwidth
frame filtering
display which MAC addresses are associated with which port interface
show mac address-table
the switches will flood broadcasts endlessly throughout the internet work
broadcast storm
constantly updating the MAC filter table with source hardware address locations that it will fail to forward a frame
thrashing the MAC table
the switch only waits for the destination hardware address to be received before it looks up the destination address in the MAC filter table
Cut-through (Fast Forward/Real-Time)
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
Store-and-Forward
What are the three switch functions at layer 2?
Address learning, forward/filter decisions, loop avoidance
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?
It will add the source MAC address in the forward/filter table and associate it with the port the frame was received on
What is used at layer 2 to prevent switching loops?
Spanning Tree Protocol (STP)
Which LAN switch method receives the complete frame before beginning to forward it?
Store-and-forward
Switches break up ___________________ domains
Collision
What is used to prevent switching loops in a network with redundant switched paths?
Spanning Tree Protocol (STP)
What are the three distinct functions of layer 2 switching that increase available bandwidth on the network?
address learning, forwarding and filtering of the network, and loop avoidance
Which of the following is true regarding layer 2 switches? (Choose two.)
A switch is a multiport bridge & Switches learn MAC addresses by examining the source address of each frame.
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?
Floods the network with the frame looking for the device
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?
Add the source address and port to the MAC address table and forward the frame out the destination port.
Which of the following is a characteristic of having a network segment on a switch?
One device per segment can send frames to the switch at a time.
Layer 2 switching provides which of the following? (Choose four.)
Hardware-based bridging (ASIC), Wire speed, Low latency, Low cost
