HomeVLAN & 802.1Q Practice Quiz SeriesVLAN & 802.1QFull nameEmail addressGenderSelectMaleFemaleOtherPrefer not to sayCurrent statusSelectSchool studentCollege studentWorking professionalJob seekerTeacher/TrainerOther I agree that my details and score may be stored for quiz administration.Start QuizQuestion 1 of 25VLAN & 802.1QMedium1 mark(s)1. Which statements about the IEEE 802.1Q tag are correct?Select all correct answers.It stores the TCP destination portIt replaces the source MAC addressIt adds four bytes to the Ethernet frameIt allows VLAN-aware devices to distinguish tagged VLAN trafficIt contains VLAN identification informationVLAN & 802.1QMedium1 mark(s)2. Which symptoms can indicate that an endpoint is assigned to the wrong access VLAN?Select all correct answers.ARP for the expected default gateway may failDNS automatically changes the switch access VLAN to fix itIt cannot reach the expected same-VLAN neighborsThe endpoint always receives an 802.1Q tag from a normal access portIt appears in an unexpected Layer 2 broadcast domainVLAN & 802.1QMedium1 mark(s)3. Which statements correctly describe VLAN tagging across access and trunk links?Select all correct answers.A trunk can add or carry VLAN tags for VLAN identificationAn endpoint on a typical access port normally sends untagged Ethernet framesEvery endpoint must understand 802.1Q tags to use an access portAccess VLAN membership is determined by DNSThe access switch associates those frames with the configured access VLANVLAN & 802.1QHard1 mark(s)4. Which checks are useful when troubleshooting VLAN and trunk connectivity?Select all correct answers.Confirm required VLANs exist and are activeCheck native-VLAN consistencyIgnore MAC learning and Layer 3 gateway configuration in all casesVerify endpoint access VLAN assignmentsVerify trunk status and allowed VLANsVLAN & 802.1QEasy1 mark(s)5. Which statements about broadcast traffic and VLANs are correct?Select all correct answers.A Layer 2 broadcast is normally flooded within its VLAN802.1Q combines all VLAN broadcasts into one broadcast domainEvery Ethernet broadcast automatically crosses a routerDifferent VLANs represent different Layer 2 broadcast domainsA broadcast in VLAN 10 is not normally switched directly into VLAN 20VLAN & 802.1QMedium1 mark(s)6. Which statements correctly describe a native VLAN on a conventional 802.1Q trunk?Select all correct answers.A native-VLAN mismatch can create connectivity or security concernsBoth trunk endpoints should normally use consistent native-VLAN configurationThe native VLAN automatically encrypts untagged framesOnly VLAN 1 can ever be the native VLANNative-VLAN traffic is commonly transmitted untagged by defaultVLAN & 802.1QMedium1 mark(s)7. Which statements correctly describe VLAN IDs and IP subnets?Select all correct answers.VLAN 10 must always use 10.0.0.0/8The VLAN ID automatically determines the IPv4 subnet maskAn IP subnet is a Layer 3 conceptA VLAN is a Layer 2 conceptA common design maps one IP subnet to one VLANVLAN & 802.1QMedium1 mark(s)8. Which statements about trunk links and MAC learning are correct?Select all correct answers.A switch can learn source MAC addresses received over a trunkMAC addresses are replaced by VLAN IDs on trunk linksA trunk disables MAC learningThe same trunk can carry MAC learning information for multiple VLANsMAC-table entries are normally associated with VLAN contextVLAN & 802.1QMedium1 mark(s)9. Which statements correctly describe switched virtual interfaces (SVIs) on a multilayer switch?Select all correct answers.An SVI replaces the VLAN ID in every Ethernet frameAn SVI can provide a Layer 3 interface for a VLANAn SVI can serve as the default gateway for hosts in its VLANAn SVI is a physical copper cableMultiple SVIs can support inter-VLAN routing when Layer 3 forwarding is enabledVLAN & 802.1QEasy1 mark(s)10. Which statements correctly describe an IEEE 802.1Q trunk?Select all correct answers.It replaces Ethernet MAC addresses with IP addressesIt can carry multiple VLANs over one physical linkIt can carry only one VLAN by definitionIt uses VLAN identification to distinguish tagged trafficIt commonly connects VLAN-aware switches, routers, firewalls, or serversVLAN & 802.1QMedium1 mark(s)11. Which statements correctly describe allowed VLANs on a trunk?Select all correct answers.The allowed list changes the IPv4 address of every endpointA trunk can be configured to permit only selected VLANsEvery trunk must carry all possible VLAN IDsRemoving a VLAN from the allowed list can stop that VLAN from crossing the trunkRestricting allowed VLANs can reduce unnecessary VLAN propagationVLAN & 802.1QMedium1 mark(s)12. Which statements about the 802.1Q VLAN Identifier are correct?Select all correct answers.VLAN ID 0 has a special priority-tagging meaningVLAN IDs 1 through 4094 are generally usable for normal VLAN identificationAll 4096 possible 12-bit values are ordinary user VLAN IDsA VLAN ID is a 32-bit IPv4 addressThe VLAN ID field is 12 bitsVLAN & 802.1QEasy1 mark(s)13. Which are common reasons for deploying VLANs?Select all correct answers.Provide logical segmentation independent of some physical topology constraintsLimit Layer 2 broadcast scopeEliminate the need for routing between all networksAutomatically authenticate every endpointSeparate user, server, voice, or management networksVLAN & 802.1QHard1 mark(s)14. Which practices can improve trunk configuration security and manageability?Select all correct answers.Assume native-VLAN mismatches are harmlessAllow only VLANs that are actually requiredPermit every VLAN everywhere regardless of needAvoid leaving unnecessary trunking enabled on endpoint-facing portsUse an intentional native-VLAN designVLAN & 802.1QEasy1 mark(s)15. Which statements correctly describe inter-VLAN routing?Select all correct answers.It requires every endpoint to use the same subnet mask and network addressIt merges all VLANs into one Layer 2 broadcast domainIt can be performed by a multilayer switchIt can be performed by a routerIt provides Layer 3 communication between different VLANsVLAN & 802.1QMedium1 mark(s)16. PC-A is in VLAN 10 and PC-B is in VLAN 20. Which statements are normally correct?Select all correct answers.They belong to different Layer 2 broadcast domainsThey must use identical IP addresses to communicateA Layer 2 switch automatically bridges all traffic between VLAN 10 and VLAN 20Their default gateways can be Layer 3 interfaces associated with their respective VLANsThey normally require Layer 3 routing to communicateVLAN & 802.1QHard1 mark(s)17. Which observations can help identify an 802.1Q tagging problem in a packet capture?Select all correct answers.A TCP application uses a high source portA DNS A record contains the wrong IPv4 addressTraffic for the affected VLAN appearing with the wrong VLAN identifierFrames expected to be tagged appearing untagged on a trunk capture pointUnexpected VLAN IDs in tagged framesVLAN & 802.1QMedium1 mark(s)18. Which statements summarize VLAN, trunking, and inter-VLAN routing correctly?Select all correct answers.802.1Q trunks can transport multiple VLANs over a shared linkInter-VLAN communication normally requires Layer 3 forwardingVLANs create separate Layer 2 broadcast domainsAll VLANs on a trunk automatically become one IP subnetThe native VLAN and allowed-VLAN configuration can affect trunk behaviorVLAN & 802.1QMedium1 mark(s)19. Two switches must carry VLANs 10, 20, and 30 over one inter-switch link. Which conditions are normally required?Select all correct answers.The link should operate as an appropriate trunkThe required VLANs should exist and be active where neededAll three VLANs must share one IP subnetBoth ends must be configured as access ports in VLAN 10VLANs 10, 20, and 30 should be allowed across the trunk as requiredVLAN & 802.1QHard1 mark(s)20. A host in VLAN 20 can reach other VLAN 20 hosts but cannot reach VLAN 30. Which areas should be checked?Select all correct answers.Whether local VLAN 20 switching works, which already appears to be functioningReplace every access switch because same-VLAN traffic succeedsDefault gateway configurationLayer 3 ACL or firewall policy between VLANsInter-VLAN routing configurationVLAN & 802.1QHard1 mark(s)21. Which conditions can prevent only VLAN 30 from working across a trunk while VLANs 10 and 20 work?Select all correct answers.A VLAN-specific spanning-tree or forwarding condition affects VLAN 30VLAN 30 is missing from the trunk's allowed VLAN listThe entire physical trunk must be down because one VLAN failsVLAN 30 is absent or inactive on one of the relevant switchesThe DNS server must be responsible because other VLANs workVLAN & 802.1QEasy1 mark(s)22. Which statements correctly describe a VLAN?Select all correct answers.Devices in different VLANs normally require Layer 3 forwarding to communicateEvery VLAN must use the same IPv4 subnetVLANs can segment devices using the same physical switching infrastructureA VLAN creates a logical Layer 2 broadcast domainA VLAN automatically encrypts all Ethernet trafficVLAN & 802.1QMedium1 mark(s)23. Which problems can result from a native VLAN mismatch?Select all correct answers.It automatically converts the trunk to a routed interfaceTraffic can be placed into different VLANs at opposite ends of the trunkConnectivity can behave unexpectedlyThe mismatch can introduce security concernsIt guarantees all tagged VLANs stop workingVLAN & 802.1QMedium1 mark(s)24. Which statements correctly describe router-on-a-stick?Select all correct answers.A router can use one physical Ethernet interface with multiple logical subinterfacesIt requires one physical router interface for every VLANEach router subinterface can represent a different VLAN and Layer 3 gatewayIt eliminates 802.1Q taggingThe switch-to-router link normally operates as an 802.1Q trunkVLAN & 802.1QEasy1 mark(s)25. Which statements correctly describe an access port?Select all correct answers.It commonly connects an endpoint such as a PCOrdinary endpoint frames are typically untagged on the access linkIt must carry every VLAN configured on the switchIt normally belongs to one access VLANIt can never connect an IP phonePreviousNextSubmit Quiz Related Discover more from SanchitGurukul Subscribe to get the latest posts sent to your email. Type your email… Subscribe
