2.3.2 Module Quiz – Switching Concepts Answers
1. Which statement is true about broadcast and collision domains?
- The size of the collision domain can be reduced by adding hubs to a network.
- Adding a switch to a network will increase the size of the broadcast domain.
- Adding a router to a network will increase the size of the collision domain.
- The more interfaces a router has the larger the resulting broadcast domain.
2. What is one function of a Layer 2 switch?
- forwards data based on logical addressing
- determines which interface is used to forward a frame based on the destination MAC address
- duplicates the electrical signal of each frame to every port
- learns the port assigned to a host by examining the destination MAC address
3. What is the significant difference between a hub and a Layer 2 LAN switch?
- A hub divides collision domains, and a switch divides broadcast domains.
- Each port of a hub is a collision domain, and each port of a switch is a broadcast domain.
- A switch creates many smaller collision domains, and a hub increases the size of a single collision domain.
- A hub forwards frames, and a switch forwards only packets.
4. What will a Cisco LAN switch do if it receives an incoming frame and the destination MAC address is not listed in the MAC address table?
- Send the frame to the default gateway address.
- Use ARP to resolve the port that is related to the frame.
- Drop the frame.
- Forward the frame out all ports except the port where the frame is received.
5. Which switch characteristic helps alleviate network congestion when a 10 Gbps port is forwarding data to a 1 Gbps port?
- high port density
- fast port speed
- fast internal switching
- frame buffering
6. Which switching method makes use of the FCS value?
- large frame buffer
7. 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 speed of each port
- the numbers of hosts that are connected to each switch port
8. Which information does a switch use to keep the MAC address table information current?
- the source MAC address and the incoming port
- the source and destination MAC addresses and the incoming port
- the source and destination MAC addresses and the outgoing port
- the destination MAC address and the incoming port
- the source MAC address and the outgoing port
- the destination MAC address and the outgoing port
9. Which two statements are true about half-duplex and full-duplex communications? (Choose two.)
- Half duplex has only one channel.
- Full duplex increases the effective bandwidth.
- Full duplex allows both ends to transmit and receive simultaneously.
- Full duplex offers 100 percent potential use of the bandwidth.
- All modern NICS support both half-duplex and full-duplex communication.
10. Which type of address does a switch use to build the MAC address table?
- source IP address
- source MAC address
- destination MAC address
- destination IP address
11. Which option correctly describes a switching method?
- cut-through: makes a forwarding decision after receiving the entire frame
- cut-through: provides the flexibility to support any mix of Ethernet speeds
- store-and-forward: forwards the frame immediately after examining its destination MAC address
- store-and-forward: ensures that the frame is free of physical and data-link errors
12. Which network device can serve as a boundary to divide a Layer 2 broadcast domain?
- Ethernet hub
- access point
- Ethernet bridge
13. What is the purpose of frame buffers on a switch?
- They execute checksum values before transmission.
- They provide temporary storage of the frame checksum.
- They hold traffic, thus alleviating network congestion.
- They provide a basic security scan on received frames.
14. Which network device can be used to eliminate collisions on an Ethernet network?