CCNA 1 v7 Modules 4 to 7 Ethernet Concepts Exam An

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Communications ExamAnswersModules 16 - 17: Buildingand Securing a SmallNetwork Exam Answers[PT Skills]Practice PTSkills Assessment (PTSA)[Final Skills]ITN FinalSkills Exam (PTSA)ITNv7 Practice FinalExamCCNA 1 v7 CourseFINAL Exam AnswersCCNA 1 v7 Modules 4 - 7 : EthernetConcepts Exam Answers□Dec 18,2019|U Last Updated: Aug 31, 2024|□CCNA v7 Course #1|L68 Commentsr ShareHTweetH ShareH Pin itHow to find:Press"Ctrl + F"in the browser and fill inwhatever wording is in the question to find thatquestion/answer. If the question is not here, find it inQuestions BankNOTE: If you have the new question on this test,please comment Question and Multiple-Choice list inform below this article. We will update answers foryou in the shortest time. Thank you! We truly valueyour contribution to the website.Related Posts10.3.4 Packet Tracer - Connect aRouter to a LAN (Answers)CCNA 1 (Version 7.00) ITNv7Practice Final Exam AnswersCheckpoint Exam: Ethernet Concepts ExamAnswers13.3.2 Lab - Use Ping andTraceroute to Test NetworkConnectivity (Answers)17.7.7 Packet Tracer -Troubleshoot Connectivity Issues -Physical Mode Answers4.2.7 Check Your Understanding -Physical Layer CharacteristicsAnswers7.3.7 Lab - View the Switch MACAddress Table (Answers)14.8.3 Module Quiz - TransportLayer (Answers)Modules 4 - 7 of the CCNA1 - Introduction toNetworks v7.0 (ITN)1. What is the purpose of the OSI physical layer?•controlling access to media•transmitting bits across the local media■performing error detection on received frames•exchanging frames between nodes over physical networkmedia2. Why are two strands of fiber used for a single fiberoptic connection?•The two strands allow the data to travel for longerdistances without degrading.

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3.2.4 Check Your Understanding -Protocols Answers2.6.3 Check Your Understanding -Ports and Addresses Answers12.5.8 Check Your Understanding -Dynamic Addressing for IPv6 GUAsAnswersRecent CommentsX1eg on7.2.10 Packet Tracer -Configure DHCPv4 (InstructionsAnswer)phong on1.3.7 Check YourUnderstanding - OSPF OperationAnswersreyes on7.2.10 Packet Tracer -Configure DHCPv4 (InstructionsAnswer)Billy on 7.2.10 Packet Tracer -Configure DHCPv4 (InstructionsAnswer)Anonymous onModules 15-17:Cryptography Group Exam AnswersFull’They prevent crosstalk from causing interference on theconnection.‘They increase the speed at which the data can travel.•They allow for full-duplex connectivity.3. Which characteristic describes crosstalk?•the distortion of the network signal from fluorescentlighting•the distortion of the transmitted messages fromsignals carried in adjacent wires•the weakening of the network signal over long cablelengths•the loss of wireless signal over excessive distance fromthe access point4. Which procedure is used to reduce the effect ofcrosstalk in copper cables?•requiring proper grounding connections•twisting opposing circuit wire pairs together•wrapping the bundle of wires with metallic shielding•designing a cable infrastructure to avoid crosstalkinterference•avoiding sharp bends during installation5. Match the situation with the appropriate use of networkmedia.

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6. A network administrator is measuring the transfer ofbits across the company backbone for a mission criticalfinancial application. The administrator notices that thenetwork throughput appears lower than the bandwidthexpected. Which three factors could influence thedifferences in throughput? (Choose three.)•the amount of traffic that is currently crossing thenetwork•the sophistication of the encapsulation method applied tothe data•the type of traffic that is crossing the network•the latency that is created by the number of networkdevices that the data is crossing•the bandwidth of the WAN connection to the Internet•the reliability of the gigabit Ethernet infrastructure of thebackboneExplanation:Throughput usually does not match thespecified bandwidth of physical links due to multiplefactors. These factors include, the amount of traffic, typeof traffic, and latency created by the network devices thedata has to cross.7. What are two characteristics of fiber-optic cable?(Choose two.)•It is not affected by EMI or RFI.•Each pair of cables is wrapped in metallic foil.■It combines the technique of cancellation, shielding, andtwisting to protect data.•It typically contains 4 pairs of fiber-optic wires.■It is more expensive than UTP cabling is.Explanation:Fiber-optic cabling supports higherbandwidth than UTP for longer distances. Fiber is

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immune to EMT and RFI, but costs more, requires moreskill to install, and requires more safety precautions.8. What is a primary role of the Physical layer intransmitting data on the network?create the signals that represent the bits in eachframe on to the mediaprovide physical addressing to the devicesdetermine the path packets take through the networkcontrol data access to the mediaExplanation:The OSI physical layer provides the meansto transport the bits that make up a frame across thenetwork media. This layer accepts a complete framefrom the data link layer and encodes it as a series ofsignals that are transmitted to the local media.9. With the use of unshielded twisted-pair copper wire ina network, what causes crosstalk within the cable pairs?the magnetic field around the adjacent pairs of wirethe use of braided wire to shield the adjacent wire pairsthe reflection of the electrical wave back from the far endof the cablethe collision caused by two nodes trying to use the mediasimultaneouslyExplanation:Crosstalk is a type of noise, or interferencethat occurs when signal transmission on one wireinterferes with another wire. When current flows througha wire a magnetic field is produced. The producedmagnetic field will interface the signal earned in theadjacent wire.10. Refer to the graphic. What type of cabling is shown?

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STPUTPcoaxfiberExplanation:Network cabling include different types ofcables:UTP cable consists of four pairs of color-coded wiresthat have been twisted together and then encased ina flexible plastic sheath.STP cable uses four pairs of wires, each wrapped ina foil shield, which are then wrapped in an overallmetallic braid or foil.Coaxial cable uses a copper conductor and a layerof flexible plastic insulation surrounds the copperconductor.Fiber cable is a flexible, extremely thin, transparentstrand of glass surrounded by plastic insulation.11. In addition to the cable length, what two factors couldinterfere with the communication carried over UTPcables? (Choose two.)crosstalkbandwidthsize of the networksignal modulation techniqueelectromagnetic interference

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Explanation:Copper media is widely used in networkcommunications. However, copper media is limited bydistance and signal interference. Data is transmitted oncopper cables as electrical pulses. The electrical pulsesare susceptible to interference from two sources:Electromagnetic interference (EMI) or radiofrequency interference (RFI)- EMI and RFIsignals can distort and corrupt the data signals beingcarried by copper media.Crosstalk- Crosstalk is a disturbance caused bythe electric or magnetic fields of a signal on one wireinterfering with the signal in an adjacent wire.12. Refer to the graphic. What type of cabling is shown?STPUTPcoaxfiber13. Which two devices commonly affect wirelessnetworks? (Choose two.)Blu-ray playershome theaterscordless phonesmicrowavesincandescent light bulbsexternal hard drives

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Explanation:Radio Frequency Interference (RFI) is theinterference that is caused by radio transmitters andother devices that are transmitting in the samefrequency.14. Which two statements describe the services providedby the data link layer? (Choose two.)It defines the end-to-end delivery addressing scheme.It maintains the path between the source and destinationdevices during the data transmission.It manages the access of frames to the networkmedia.It provides reliable delivery through link establishmentand flow control.It ensures that application data will be transmittedaccording to the prioritization.It packages various Layer 3 PDUs into a frame formatthat is compatible with the network interface.Explanation:The data link layer is divided into two sublayers, namely Logical Link Control (LLC) and MediaAccess Control (MAC). LLC forms a frame from thenetwork layer PDU into a format that conforms to therequirements of the network interface and media. Anetwork layer PDU might be for IPv4 or IPv6. The MACsub layer defines the media access processes performedby the hardware. It manages the frame access to thenetwork media according to the physical signalingrequirements (copper cable, fiber optic, wireless, etc.)15. What is the function of the CRC value that is found inthe FCS field of a frame?to verify the integrity of the received frameto verify the physical address in the frameto verify the logical address in the frame

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to compute the checksum header for the data field in theframeExplanation:The CRC value in the FCS field of thereceived frame is compared to the computed CRC valueof that frame, in order to verify the integrity of the frame.If the two values do not match, then the frame isdiscarded.16. What is contained in the trailer of a data-link frame?logical addressphysical addressdataerror detectionExplanation:The trailer in a data-link frame containserror detection information that is pertinent to the frameincluded in the FCS field. The header contains controlinformation, such as the addressing, while the area thatis indicated by the word "data" includes the data,transport layer PDU, and the IP header.17. Which statement describes a characteristic of theframe header fields of the data link layer?They all include the flow control and logical connectionfields.Ethernet frame header fields contain Layer 3 source anddestination addresses.They vary depending on protocols.They include information on user applications.Explanation:All data link layer protocols encapsulatethe Layer 3 PDU within the data field of the frame.However, the structure of the frame and the fields thatare contained in the header vary according to the

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protocol. Different data link layer protocols may usedifferent fields, like priority/quality of service, logicalconnection control, physical link control, flow control, andcongestion control.18. A network team is comparing physical WANtopologies for connecting remote sites to a headquartersbuilding. Which topology provides high availability andconnects some, but not all, remote sites?meshpartial meshhub and spokepoint-to-pointExplanation:Partial mesh topologies provide highavailability by interconnecting multiple remote sites, butdo not require a connection between all remote sites. Amesh topology requires point-to-point links with everysystem being connected to every other system. A point-to-point topology is where each device is connected toone other device. A hub and spoke uses a central devicein a star topology that connects to other point-to-pointdevices.19. Which two fields or features does Ethernet examine todetermine if a received frame is passed to the data linklayer or discarded by the NIC? (Choose two.)auto-MDIXCEFFrame Check Sequenceminimum frame sizesource MAC addressExplanation:An Ethernet frame is not processed and isdiscarded if it is smaller than the minimum (64 bytes) or if

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the calculated frame check sequence (FCS) value doesnot match the received FCS value. Auto-MDIX(automatic medium-dependent interface crossover) isLayer 1 technology that detects cable straight-through orcrossover types. The source MAC address is not used todetermine how the frame is received. CEF (CiscoExpress Forwarding) is a technology used to expediteLayer 3 switching.20. Which media communication type does not requiremedia arbitration in the data link layer?deterministichalf-duplexfull-duplexcontrolled accessExplanation:Half-duplex communication occurs whenboth devices can both transmit and receive on themedium but cannot do so simultaneously. Full-duplexcommunication occurs when both devices can transmitand receive on the medium at the same time andtherefore does not require media arbitration. Half-duplexcommunication is typically contention-based, whereascontrolled (deterministic) access is applied intechnologies where devices take turns to access themedium.21. Which statement describes an extended startopology?End devices connect to a central intermediate device,which in turn connects to other central intermediatedevices.End devices are connected together by a bus and eachbus connects to a central intermediate device.Each end system is connected to its respective neighborvia an intermediate device.

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