HomeEthernet & MAC Addressing 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. What can a Layer 2 switch do with an unknown unicast frame?Select all correct answers.Drop every unknown unicast frame by definitionRoute the frame using the Internet routing tableLearn the source MAC addressFlood the frame out eligible ports in the same VLAN except the ingress portLater reduce flooding after learning the destination MAC locationEthernet & MAC AddressingEasy1 mark(s)2. Which statements correctly compare MAC addresses and IPv4 addresses?Select all correct answers.IPv4 addresses are learned into a switch MAC table as Layer 2 destinationsMAC addresses support Layer 2 delivery on a local linkMAC addresses replace IP addresses whenever a router is presentRouters normally make forwarding decisions using IP network informationIPv4 addresses provide Layer 3 logical addressingEthernet & MAC AddressingHard1 mark(s)3. A host is sending an IPv4 packet to a destination on a different subnet. Which statements are normally correct?Select all correct answers.The local Ethernet frame can use the default gateway's MAC as its destinationThe Ethernet frame must use the remote host's MAC across every routed hopThe host may use ARP to learn the gateway's MAC addressThe host keeps the remote host's IP address as the packet destinationThe destination IP is replaced with the gateway IP merely because routing is requiredEthernet & MAC AddressingMedium1 mark(s)4. 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 automatically forwarded across all routers on the InternetThe frame is not normally forwarded into unrelated VLANs without Layer 3 processingThe switch can learn the source MAC on the ingress portThe frame is normally flooded to eligible ports in the same VLAN except the ingress portEthernet & MAC AddressingEasy1 mark(s)5. Which statements about Ethernet unicast traffic are correct?Select all correct answers.A switch can forward it toward a learned destination portIt can represent one-to-one Layer 2 communicationIt is addressed to one destination MAC addressIts destination MAC must always be FF:FF:FF:FF:FF:FFEvery switch port must receive it even when the destination is knownEthernet & MAC AddressingMedium1 mark(s)6. Which statements about VLAN tagging with IEEE 802.1Q are correct?Select all correct answers.Its insertion increases the Ethernet frame header by four bytesIt is commonly used on trunk links carrying multiple VLANsIt can carry VLAN identification in an Ethernet frameIt converts Ethernet into a Layer 3 routing protocolIt replaces both source and destination MAC addressesEthernet & MAC AddressingMedium1 mark(s)7. 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 tableThey associate IPv4 addresses with link-layer addressesDynamic entries can expire or be refreshedThey can reduce repeated ARP requests for recently resolved neighborsEthernet & MAC AddressingMedium1 mark(s)8. Which statements about Ethernet frame size are correct for a standard untagged Ethernet frame?Select all correct answers.The 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 bytesThe minimum frame size is 8 bytesEvery Ethernet frame must be exactly 1518 bytesEthernet & MAC AddressingMedium1 mark(s)9. A switch receives a unicast frame whose destination MAC is already learned. Which actions are expected?Select all correct answers.It changes the destination MAC to its own MACThe switch looks up the destination MAC in its MAC tableIt still learns or refreshes the source MAC on the ingress portIt forwards the frame toward the associated destination port when appropriateIt must broadcast the frame to every VLANEthernet & MAC AddressingMedium1 mark(s)10. Which statements about the Ethernet EtherType field are correct?Select all correct answers.It can identify the protocol carried in the Ethernet payloadIt stores the switch's MAC table aging timerIt contains the source TCP port0x0806 identifies ARP in Ethernet II0x0800 identifies IPv4 in Ethernet IIEthernet & MAC AddressingEasy1 mark(s)11. Which statements about the Ethernet broadcast address are correct?Select all correct answers.It identifies one specific destination NICA router normally forwards Layer 2 broadcasts unchanged between different LANsARP requests commonly use an Ethernet broadcast destinationA Layer 2 switch normally floods it within the relevant VLANIt is FF:FF:FF:FF:FF:FFEthernet & MAC AddressingMedium1 mark(s)12. Which events can cause a switch MAC table entry to change or disappear?Select all correct answers.Changing a TCP destination port automatically deletes the MAC entryA MAC observed on another port can cause its learned location to updateA DNS lookup permanently locks the MAC entryAdministrative clearing can remove dynamic entriesThe entry can age out after inactivityEthernet & MAC AddressingEasy1 mark(s)13. Which are valid ways a 48-bit MAC address may be represented?Select all correct answers.00-1A-2B-3C-4D-5E255.255.255.000:1A:2B:3C:4D:5E001A.2B3C.4D5E192.168.1.10Ethernet & MAC AddressingMedium1 mark(s)14. 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 sender issues an ARP requestThe sender must first send the packet to a remote Internet routerThe target can return its MAC address in an ARP replyThe ARP request asks which device owns the target IPv4 addressDNS must resolve the target MAC addressEthernet & MAC AddressingEasy1 mark(s)15. Which statements about a standard Ethernet MAC address are correct?Select all correct answers.It operates primarily at OSI Layer 2It is normally 32 bits long like IPv4It is commonly written as six hexadecimal octetsIt is normally 48 bits longIt identifies a TCP or UDP application portEthernet & MAC AddressingEasy1 mark(s)16. Which statements correctly describe ARP in IPv4 Ethernet networks?Select all correct answers.ARP translates a domain name into an IPv4 addressARP replies are commonly sent directly to the requesterARP resolves an IPv4 address to a Layer 2 address on the local linkARP requests are commonly sent as Ethernet broadcastsARP discovers the TCP destination portEthernet & MAC AddressingMedium1 mark(s)17. Which statements correctly describe full-duplex Ethernet?Select all correct answers.CSMA/CD is not needed for normal full-duplex operationA device can transmit and receive simultaneouslyOnly one side can transmit at a timeTraditional Ethernet collisions are not expected on a properly operating full-duplex point-to-point linkIt requires an Ethernet hub between the endpointsEthernet & MAC AddressingHard1 mark(s)18. Which symptoms can indicate a Layer 2 or MAC-related problem?Select all correct answers.ARP resolution for a local IPv4 neighbor repeatedly failsA VLAN mismatch prevents intended local frame deliveryAn application uses the wrong TCP port, which by itself proves a MAC table failureThe expected MAC address is learned on the wrong switch portA DNS record has a spelling mistake, which is always a Layer 2 faultEthernet & MAC AddressingEasy1 mark(s)19. 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 learns destination MAC addresses only from ARP repliesIt assigns a new MAC address to every connected hostIt stores learned entries in a MAC address tableEthernet & MAC AddressingMedium1 mark(s)20. Which statements about Ethernet multicast are correct?Select all correct answers.It can deliver frames to a group of interested receiversIts destination must be FF:FF:FF:FF:FF:FFIt always targets exactly one hostIt differs from the all-stations Ethernet broadcast addressIt uses multicast destination MAC addressingEthernet & MAC AddressingMedium1 mark(s)21. Which statements describe a broadcast domain?Select all correct answers.Every port on every Internet router belongs to one global broadcast domainDifferent VLANs normally represent different Layer 2 broadcast domainsTCP port numbers define Ethernet broadcast domainsEthernet broadcasts are normally propagated by switches within the same VLANA router or Layer 3 boundary normally separates broadcast domainsEthernet & MAC AddressingEasy1 mark(s)22. Which fields are part of a basic Ethernet frame?Select all correct answers.Frame Check SequenceSource MAC addressIPv4 subnet mask as an Ethernet header fieldTCP source port as an Ethernet header fieldDestination MAC addressEthernet & MAC AddressingMedium1 mark(s)23. Which statements about collision domains in modern switched Ethernet are correct?Select all correct answers.All ports in a VLAN must share one collision domainA router is required to create a separate collision domain for each switch portEach switch port normally forms a separate collision domainFull-duplex switched Ethernet avoids traditional CSMA/CD collisions on the linkA hub can place attached devices in a shared collision domainEthernet & MAC AddressingHard1 mark(s)24. Which steps are useful when troubleshooting Ethernet and MAC-addressing connectivity?Select all correct answers.Change the destination MAC manually before checking the network pathCheck interface link state and VLAN membershipInspect the switch MAC address tableInspect the host ARP or neighbor cacheAssume every connectivity problem is caused by DNSEthernet & MAC AddressingMedium1 mark(s)25. Which statements correctly describe the Ethernet Frame Check Sequence (FCS)?Select all correct answers.It identifies the destination IP subnetIt is used for error detectionIt is based on a cyclic redundancy checkA receiver can use it to detect corrupted framesIt repairs corrupted payload bytes automaticallyPreviousNextSubmit Quiz Related Discover more from SanchitGurukul Subscribe to get the latest posts sent to your email. Type your email… Subscribe
