Practice Quiz SeriesEthernet & MAC AddressingFull 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 25Ethernet & MAC AddressingMedium1 mark(s)1. Which statements about Ethernet multicast are correct?Select all correct answers.It uses multicast destination MAC addressingIts destination must be FF:FF:FF:FF:FF:FFIt can deliver frames to a group of interested receiversIt always targets exactly one hostIt differs from the all-stations Ethernet broadcast addressEthernet & MAC AddressingEasy1 mark(s)2. Which statements correctly describe how an Ethernet switch learns MAC addresses?Select all correct answers.It examines source MAC addresses of received framesIt associates learned source MAC addresses with ingress portsIt assigns a new MAC address to every connected hostIt stores learned entries in a MAC address tableIt learns destination MAC addresses only from ARP repliesEthernet & MAC AddressingMedium1 mark(s)3. Which statements describe a broadcast domain?Select all correct answers.Every port on every Internet router belongs to one global broadcast domainA router or Layer 3 boundary normally separates broadcast domainsDifferent VLANs normally represent different Layer 2 broadcast domainsEthernet broadcasts are normally propagated by switches within the same VLANTCP port numbers define Ethernet broadcast domainsEthernet & MAC AddressingMedium1 mark(s)4. Which statements about VLAN tagging with IEEE 802.1Q are correct?Select all correct answers.It converts Ethernet into a Layer 3 routing protocolIt can carry VLAN identification in an Ethernet frameIts insertion increases the Ethernet frame header by four bytesIt replaces both source and destination MAC addressesIt is commonly used on trunk links carrying multiple VLANsEthernet & MAC AddressingHard1 mark(s)5. Which steps are useful when troubleshooting Ethernet and MAC-addressing connectivity?Select all correct answers.Check interface link state and VLAN membershipInspect the host ARP or neighbor cacheChange the destination MAC manually before checking the network pathAssume every connectivity problem is caused by DNSInspect the switch MAC address tableEthernet & MAC AddressingMedium1 mark(s)6. Which statements about the Ethernet EtherType field are correct?Select all correct answers.0x0806 identifies ARP in Ethernet IIIt contains the source TCP portIt can identify the protocol carried in the Ethernet payloadIt stores the switch's MAC table aging timer0x0800 identifies IPv4 in Ethernet IIEthernet & MAC AddressingMedium1 mark(s)7. A host wants to communicate with another host in the same IPv4 subnet but does not know its MAC address. Which actions can occur?Select all correct answers.The target can return its MAC address in an ARP replyThe sender issues an ARP requestThe ARP request asks which device owns the target IPv4 addressThe sender must first send the packet to a remote Internet routerDNS must resolve the target MAC addressEthernet & MAC AddressingEasy1 mark(s)8. Which statements about Ethernet unicast traffic are correct?Select all correct answers.A switch can forward it toward a learned destination portIts destination MAC must always be FF:FF:FF:FF:FF:FFEvery switch port must receive it even when the destination is knownIt is addressed to one destination MAC addressIt can represent one-to-one Layer 2 communicationEthernet & MAC AddressingMedium1 mark(s)9. Which statements correctly describe full-duplex Ethernet?Select all correct answers.A device can transmit and receive simultaneouslyTraditional Ethernet collisions are not expected on a properly operating full-duplex point-to-point linkCSMA/CD is not needed for normal full-duplex operationIt requires an Ethernet hub between the endpointsOnly one side can transmit at a timeEthernet & MAC AddressingMedium1 mark(s)10. What can a Layer 2 switch do with an unknown unicast frame?Select all correct answers.Learn the source MAC addressDrop every unknown unicast frame by definitionRoute the frame using the Internet routing tableLater reduce flooding after learning the destination MAC locationFlood the frame out eligible ports in the same VLAN except the ingress portEthernet & MAC AddressingMedium1 mark(s)11. A switch receives a unicast frame whose destination MAC is already learned. Which actions are expected?Select all correct answers.It forwards the frame toward the associated destination port when appropriateThe switch looks up the destination MAC in its MAC tableIt must broadcast the frame to every VLANIt still learns or refreshes the source MAC on the ingress portIt changes the destination MAC to its own MACEthernet & MAC AddressingEasy1 mark(s)12. Which statements about a standard Ethernet MAC address are correct?Select all correct answers.It is normally 48 bits longIt operates primarily at OSI Layer 2It identifies a TCP or UDP application portIt is normally 32 bits long like IPv4It is commonly written as six hexadecimal octetsEthernet & MAC AddressingMedium1 mark(s)13. Which statements about collision domains in modern switched Ethernet are correct?Select all correct answers.Each switch port normally forms a separate collision domainA router is required to create a separate collision domain for each switch portA hub can place attached devices in a shared collision domainAll ports in a VLAN must share one collision domainFull-duplex switched Ethernet avoids traditional CSMA/CD collisions on the linkEthernet & MAC AddressingHard1 mark(s)14. A host is sending an IPv4 packet to a destination on a different subnet. Which statements are normally correct?Select all correct answers.The Ethernet frame must use the remote host's MAC across every routed hopThe host keeps the remote host's IP address as the packet destinationThe host may use ARP to learn the gateway's MAC addressThe destination IP is replaced with the gateway IP merely because routing is requiredThe local Ethernet frame can use the default gateway's MAC as its destinationEthernet & MAC AddressingMedium1 mark(s)15. Which statements correctly describe the Ethernet Frame Check Sequence (FCS)?Select all correct answers.It is based on a cyclic redundancy checkA receiver can use it to detect corrupted framesIt identifies the destination IP subnetIt repairs corrupted payload bytes automaticallyIt is used for error detectionEthernet & MAC AddressingEasy1 mark(s)16. Which are valid ways a 48-bit MAC address may be represented?Select all correct answers.192.168.1.1000-1A-2B-3C-4D-5E00:1A:2B:3C:4D:5E001A.2B3C.4D5E255.255.255.0Ethernet & MAC AddressingEasy1 mark(s)17. Which statements correctly describe ARP in IPv4 Ethernet networks?Select all correct answers.ARP discovers the TCP destination portARP requests are commonly sent as Ethernet broadcastsARP replies are commonly sent directly to the requesterARP translates a domain name into an IPv4 addressARP resolves an IPv4 address to a Layer 2 address on the local linkEthernet & MAC AddressingMedium1 mark(s)18. Which statements about ARP cache entries are correct?Select all correct answers.They map domain names directly to TCP portsThey permanently replace the switch MAC address tableDynamic entries can expire or be refreshedThey can reduce repeated ARP requests for recently resolved neighborsThey associate IPv4 addresses with link-layer addressesEthernet & MAC AddressingMedium1 mark(s)19. Which statements about Ethernet frame size are correct for a standard untagged Ethernet frame?Select all correct answers.The minimum frame size is 8 bytesThe standard maximum frame size from destination MAC through FCS is 1518 bytesPadding can be added when the payload is too smallThe minimum frame size from destination MAC through FCS is 64 bytesEvery Ethernet frame must be exactly 1518 bytesEthernet & MAC AddressingMedium1 mark(s)20. Which events can cause a switch MAC table entry to change or disappear?Select all correct answers.The entry can age out after inactivityChanging a TCP destination port automatically deletes the MAC entryA MAC observed on another port can cause its learned location to updateAdministrative clearing can remove dynamic entriesA DNS lookup permanently locks the MAC entryEthernet & MAC AddressingEasy1 mark(s)21. Which statements about the Ethernet broadcast address are correct?Select all correct answers.It is FF:FF:FF:FF:FF:FFARP requests commonly use an Ethernet broadcast destinationA Layer 2 switch normally floods it within the relevant VLANIt identifies one specific destination NICA router normally forwards Layer 2 broadcasts unchanged between different LANsEthernet & MAC AddressingEasy1 mark(s)22. Which statements correctly compare MAC addresses and IPv4 addresses?Select all correct answers.MAC addresses support Layer 2 delivery on a local linkMAC addresses replace IP addresses whenever a router is presentIPv4 addresses provide Layer 3 logical addressingIPv4 addresses are learned into a switch MAC table as Layer 2 destinationsRouters normally make forwarding decisions using IP network informationEthernet & MAC AddressingMedium1 mark(s)23. A switch receives an Ethernet broadcast frame on a normal access port. Which actions are expected?Select all correct answers.The switch changes the destination to a random unicast MACThe frame is not normally forwarded into unrelated VLANs without Layer 3 processingThe frame is automatically forwarded across all routers on the InternetThe frame is normally flooded to eligible ports in the same VLAN except the ingress portThe switch can learn the source MAC on the ingress portEthernet & MAC AddressingEasy1 mark(s)24. Which fields are part of a basic Ethernet frame?Select all correct answers.Destination MAC addressFrame Check SequenceSource MAC addressTCP source port as an Ethernet header fieldIPv4 subnet mask as an Ethernet header fieldEthernet & MAC AddressingHard1 mark(s)25. Which symptoms can indicate a Layer 2 or MAC-related problem?Select all correct answers.The expected MAC address is learned on the wrong switch portA DNS record has a spelling mistake, which is always a Layer 2 faultAn application uses the wrong TCP port, which by itself proves a MAC table failureA VLAN mismatch prevents intended local frame deliveryARP resolution for a local IPv4 neighbor repeatedly failsPreviousNextSubmit Quiz Related Discover more from SanchitGurukul Subscribe to get the latest posts sent to your email. Type your email… Subscribe Previous article ☟Subnetting FundamentalsRead the guideNext article ☟Switching FundamentalsRead the guide
