2.2 Configure and Verify Interswitch Connectivity 200-301 Practice Questions (Page 6)

Questions 26–30

1. 26application · medium

   A network administrator is configuring a trunk between two switches. The administrator sets the native VLAN to VLAN 10 on Switch A but leaves the default native VLAN on Switch B. The administrator notices that some frames are being placed in the wrong VLAN. What is the most likely cause?

   • ASpanning Tree Protocol is blocking the trunk port.
   • BThe allowed VLAN list is not configured on Switch B.
   • CThe native VLAN mismatch causes untagged frames to be interpreted differently on each switch.
   • DThe trunk is not using 802.1Q encapsulation.
   Reveal Solution Discussion Select an answer first
2. 27foundation · easy

   Which command shows whether a specific interface is in trunk mode and the encapsulation type in use?

   • Ashow interfaces trunk
   • Bshow mac address-table
   • Cshow interfaces switchport
   • Dshow interfaces description
   Reveal Solution Discussion Select an answer first
4. 28application · medium

   A network admin is configuring a new trunk between two switches. The admin wants to ensure that all untagged traffic on the trunk is treated as VLAN 10. Which configuration is required on both switches?

   • ASet the access VLAN to 10 on the trunk port
   • BSet the allowed VLAN list to include only VLAN 10
   • CSet the native VLAN to 10 on both trunk ports
   • DSet the trunk port to 'switchport mode dynamic desirable'
   Reveal Solution Discussion Select an answer first
5. 29foundation · easy

   What happens to the Frame Check Sequence (FCS) when a switch inserts an 802.1Q tag into an Ethernet frame?

   • AThe FCS is moved to the beginning of the frame.
   • BThe FCS is recalculated and updated to reflect the new frame contents.
   • CThe FCS remains unchanged because the tag is not part of the frame.
   • DThe FCS is removed and replaced with the VLAN ID.
   Reveal Solution Discussion Select an answer first
6. 30application · medium

   A network engineer is troubleshooting a trunk link between two Cisco switches. The engineer captures frames on the link and sees that frames from VLAN 10 have an extra 4-byte field inserted after the source MAC address, while frames from the native VLAN do not have this field. What is the engineer observing?

   • AA misconfigured trunk where VLAN 10 is the native VLAN.
   • B802.1Q tagging, where VLAN 10 frames are tagged and native VLAN frames are sent untagged.
   • CISL encapsulation, which adds a 26-byte header and a 4-byte trailer.
   • DA loop caused by Spanning Tree Protocol, duplicating frames.
   Reveal Solution Discussion Select an answer first