4.5. Explain Basic Switching Concepts. 100-150 Practice Questions (Page 6)

Questions 26–30

1. 26application · medium

   A network admin notices that a switch is flooding many frames to all ports. The admin suspects the MAC address table is not learning addresses correctly. What is the most likely cause of excessive flooding?

   • AThe switch is configured with too many VLANs.
   • BThe switch is using a hub instead of a switch.
   • CMAC address filtering is blocking the switch from learning addresses.
   • DThe switch's MAC address table has reached its capacity and cannot learn new addresses.
   Reveal Solution Discussion Select an answer first
2. 27expert · medium

   A network administrator is designing a network for a school with three labs. Each lab should be isolated from the others to prevent broadcast storms from affecting all labs. The administrator has one switch with 48 ports. What is the most efficient way to achieve this?

   • AUse MAC address filtering to block broadcasts between labs.
   • BCreate three VLANs and assign each lab's ports to a separate VLAN.
   • CUse port security to limit the number of devices per port.
   • DConnect each lab to a separate hub and then to the switch.
   Reveal Solution Discussion Select an answer first
4. 28foundation · easy

   A network administrator configures a switch port to allow only the MAC address of a specific IP phone. What happens when a different device is connected to that port?

   • AThe switch automatically updates the allowed MAC address to the new device
   • BThe switch blocks traffic from the new device, potentially placing the port in a restricted state
   • CThe switch sends an alert but continues to forward traffic
   • DThe switch forwards frames from the new device but marks them as untrusted
   Reveal Solution Discussion Select an answer first
5. 29application · easy

   A switch has ports 1-8 assigned to VLAN 10 and ports 9-16 assigned to VLAN 20. A broadcast frame is sent by a device on port 3. Which ports will receive the frame?

   • APorts 1-8, except port 3.
   • BPorts 9-16 only.
   • COnly port 3.
   • DPorts 1-16, except port 3.
   Reveal Solution Discussion Select an answer first
6. 30application · medium

   A network administrator is troubleshooting slow performance on a flat Layer 2 network with many devices. The administrator suspects excessive broadcast traffic is consuming bandwidth. What should the administrator do to reduce the impact of broadcasts?

   • AIncrease the switch's MAC address table size.
   • BDivide the devices into multiple VLANs to create smaller broadcast domains.
   • CEnable MAC address filtering to block broadcast frames.
   • DReplace the switch with a hub to reduce broadcast overhead.
   Reveal Solution Discussion Select an answer first