1.13 Describe Switching Concepts 200-301 Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A network administrator notices that the MAC address table on a switch has entries for devices that have been disconnected for several days. The administrator wants to ensure these stale entries are removed automatically without manual intervention. What should the administrator do?

   • AIncrease the MAC aging timer to keep entries longer.
   • BDisable MAC learning on the switch.
   • CManually clear the MAC address table once a day.
   • DConfigure a shorter MAC aging timer.
   Reveal Solution Discussion Select an answer first
2. 7application · medium

   A switch has a MAC address table entry for a workstation on port Gi0/1. The workstation is moved to port Gi0/5 and sends a frame. What will the switch do with the existing entry?

   • AUpdate the entry to map the workstation's MAC to Gi0/5.
   • BKeep the entry on Gi0/1 and add a second entry for Gi0/5.
   • CFlood the frame out all ports to relearn the correct port.
   • DDrop the frame because the MAC is already known on another port.
   Reveal Solution Discussion Select an answer first
4. 8expert · hard

   A network administrator notices that the switch is flooding frames to a server that is actively sending traffic. The server's MAC address is in the MAC address table, but the entry is frequently removed and relearned. What is the most likely cause?

   • AThe switch's MAC address table is full, so it cannot retain the server's entry.
   • BThe server is connected to a port that is administratively down.
   • CThe MAC aging timer is set too low, causing the entry to expire between the server's transmissions.
   • DThe server is sending frames with a different source MAC address each time.
   Reveal Solution Discussion Select an answer first
5. 9expert · hard

   A network administrator is troubleshooting a security issue. The administrator suspects that a malicious device is sending frames with spoofed source MAC addresses to redirect traffic. Which feature or behavior of the switch's MAC address table would the administrator need to understand to detect this?

   • AThe switch floods frames with unknown destination MACs.
   • BThe switch ages out MAC entries after a period of inactivity.
   • CThe switch learns MAC addresses only from the destination MAC of frames.
   • DThe switch updates the MAC table entry for a source MAC to the most recent port it was seen on.
   Reveal Solution Discussion Select an answer first
6. 10application · medium

   A network administrator connects a new server to a switch port and then initiates a large file transfer from a workstation on a different port. The switch's MAC address table currently has no entry for the server. How will the switch handle the first frame sent by the workstation to the server?

   • ADrop the frame and send an ICMP unreachable message back to the workstation.
   • BForward the frame only to the port where the server is connected after learning the server's MAC from the frame's destination address.
   • CFlood the frame out all ports except the receiving port, and record the workstation's MAC address from the frame's source address.
   • DForward the frame to all ports, including the receiving port, to ensure delivery.
   Reveal Solution Discussion Select an answer first