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CISCO CCNA 3 - Module 4 Exam Answers

Take Assessment - Module 4 Exam - CCNA 3 Switching Basics and Intermediate Routing (Version 3.1)

1 Which statements are true concerning the shared memory buffering used by an Ethernet switch? (Choose two.)
• Frames are processed through a single queue.
• All frames are placed in a common memory buffer.

• Frames are placed in a queue for the destination port.
• A port with a full memory buffer can cause frames for available ports to be delayed.
• Each switch port is statically assigned a buffer of equal size.

2 What are the functions of routers? (Choose three.)
• improving network performance by increasing latency by twenty to thirty percent
• segmenting broadcast domains
• forwarding packets based on destination network layer addresses
• segmenting collision domains

• forwarding packets as soon as the destination MAC address is read
• developing routing table entries based on source IP addresses

3 What are the functions of a Layer 2 Ethernet switch? (Choose three.)
• preventing broadcasts
• increasing available bandwidth per user
• decreasing the size of collision domains
• isolating traffic among segments

• routing traffic between different networks
• decreasing the number of broadcast domains

4 Why does a switch have higher throughput compared to a bridge?
• Switching occurs in software.
• Switching occurs in hardware.
• Switches create multiple broadcast domains.
• Switches segment LANs.

5 Why would a network administrator 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

6

Refer to the graphic. Which point must be reached before a frame is forwarded when the switch is using store-and-forward mode?
• A
• B
• C
• D
• E
• F

7 Hubs are concerned with which PDU?
• bits
• frames
• packets
• datagrams

8 Which statements are true regarding hubs? (Choose three.)
• Hubs operate at Layer 1 of the OSI model.
• They create separate collision domains.
• Signals are distributed through all ports.
• Layer 2 addresses are used to make decisions.
• They calculate the CRC for each frame received prior to forwarding.
• Bandwidth is shared among all connected users.

9 Which device provides segmentation within a single network?
• hub
• server
• switch
• transceiver

10 Which of the following is a Layer 2 broadcast address?
• 0.0.0.0
• 255.255.255.255
• 11:11:11:11
• FF:FF:FF:FF
• FF:FF:FF:FF:FF:FF

11

Refer to the graphic. Which point in the frame must be reached before it is forwarded by a switch that is using fast-forward mode?
• A
• B
• C
• D
• E
• F

12 Which switching mode changes to store-and-forward mode after it detects a given number of errors?
• cut-through
• adaptive fast-forward
• fragment-free
• adaptive cut-through

13 Which form of buffering is used by bridges?
• cut-through
• fragment-free
• fast-forward
• store-and-forward

14 Where are switching tables stored in a Cisco LAN switch?
• ROM
• CAM
• Flash
• SIMM
• NRAM

15 Which of the following are true regarding the addition of switches to a network? (Choose two.)
• They increase the number of collision domains.
• They decrease the number of collision domains.
• They increase the number of broadcast domains.
• They decrease the number of broadcast domains.
• They increase the amount of bandwidth available to users.
• They decrease the amount of bandwidth available to users.


16 Which of the following is used to build a switching table?
• source IP addresses
• destination IP addresses
• destination MAC addresses
• source MAC addresses

17 Which statements describe asymmetric switching? (Choose three.)
• It uses data compression algorithms to manage higher bandwidth interfaces.
• It is often used to provide high bandwidth uplinks for a number of lower bandwidth client interfaces.
• It provides connections between network segments that operate at different bandwidths.

• It uses cut-through forwarding when going from a lower bandwidth to a higher bandwidth interface.
• It is used to provide more bandwidth to network clients than to backbone or server links.
• It may require buffering frames before forwarding to the destination interface.

18 What does switch latency describe?
• forwarding method used by a switch
• time it takes for a frame to be received by a switch
• improvement in network performance from using a switch
• time delay between when a frame enters and exits a switch
• increase in the size of a collision domain from using a switch

19 How does an Ethernet bridge handle an incoming frame? (Choose three.)
• The source MAC address and input interface pair are added to the bridging table.
• The destination MAC address and input interface pair are added to the bridging table.
• If no match to the destination MAC address is found in the bridging table, the frame is discarded.
• If no match to the destination MAC address is found in the bridging table, the frame is flooded out all other interfaces.
• If a match to the destination MAC address is found in the bridging table, the frame is forwarded out the associated interface.

• If a match to the source MAC address is found in the bridging table, the frame is forwarded to all ports.

20 Which attribute is used by a bridge to make forwarding decisions?
• source IP address
• source MAC address
• destination IP address
• destination MAC address
• Layer 4-7 protocol address

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