Cisco Guide to Ccna Chapter 4 Review Questions

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CCNA 1 (v5.1 + v6.0) Affiliate 4 Exam Answers for Network Admission

Read Chapter wise CCNA 1 Exam Answers (v5.one + v6.0)

CCNA 1 Chapter 4 Exam Answers 2020

1. What are two reasons for physical layer protocols to use frame encoding techniques? (Cull two.)

• to reduce the number of collisions on the media
• to distinguish information bits from command $.25*
• to provide better media error correction
• to identify where the frame starts and ends*
• to increase the media throughput

2. What is indicated by the term throughput?

• the guaranteed data transfer rate offered past an ISP
• the capacity of a particular medium to carry information
• the mensurate of the usable data transferred beyond the media
• the measure of the $.25 transferred across the media over a given menstruation of time*
• the time information technology takes for a message to get from sender to receiver

iii. A network administrator notices that some newly installed Ethernet cabling is carrying corrupt and distorted data signals. The new cabling was installed in the ceiling close to fluorescent lights and electrical equipment. Which ii factors may interfere with the copper cabling and effect in signal baloney and data corruption? (Choose two.)

• EMI*
• crosstalk
• RFI*
• signal attenuation
• extended length of cabling

4. Which characteristic describes crosstalk?

• the distortion of the network signal from fluorescent lighting
• the baloney of the transmitted messages from signals carried in adjacent wires*
• the weakening of the network signal over long cable lengths
• the loss of wireless signal over excessive altitude from the access indicate

5. What technique is used with UTP cable to help protect against point interference from crosstalk?

• twisting the wires together into pairs*
• wrapping a foil shield around the wire pairs
• encasing the cables within a flexible plastic sheath
• terminating the cable with special grounded connectors

6. Refer to the exhibit. The PC is connected to the panel port of the switch. All the other connections are made through FastEthernet links. Which types of UTP cables tin be used to connect the devices?

• ane – rollover, two – crossover, 3 – straight-through
• 1 – rollover, 2 – straight-through, 3 – crossover*
• one – crossover, 2 – straight-through, 3 – rollover
• ane – crossover, 2 – rollover, iii – directly-through

7. Refer to the exhibit. What is wrong with the displayed termination?

• The woven copper complect should not accept been removed.
• The wrong type of connector is being used.
• The untwisted length of each wire is too long.*
• The wires are besides thick for the connector that is used.

eight. Which blazon of connector does a network interface bill of fare use?

• DIN
• PS-2
• RJ-xi
• RJ-45*

ix.What is i advantage of using fiber optic cabling rather than copper cabling?

• It is normally cheaper than copper cabling.
• It is able to be installed effectually sharp bends.
• It is easier to cease and install than copper cabling.
• It is able to comport signals much farther than copper cabling.*

ten. Why are two strands of cobweb used for a single fiber optic connection?

• The two strands allow the data to travel for longer distances without degrading.
• They prevent crosstalk from causing interference on the connection.
• They increase the speed at which the data tin travel.
• They allow for full-duplex connectivity.*

11. A network administrator is designing the layout of a new wireless network. Which 3 areas of concern should exist accounted for when edifice a wireless network? (Choose three.)

• mobility options
• security *
• interference *
• coverage area*
• all-encompassing cabling
• packet standoff

12. Which layer of the OSI model is responsible for specifying the encapsulation method used for specific types of media?

• awarding
• send
• data link*
• physical

13. What are ii services performed by the data link layer of the OSI model? (Choose two.)

• It encrypts data packets.
• It determines the path to forwards packets.
• It accepts Layer 3 packets and encapsulates them into frames. *
• It provides media access control and performs error detection.*
• It monitors the Layer two advice by building a MAC address table.

14. What is true concerning physical and logical topologies?

• The logical topology is always the same every bit the physical topology.
• Concrete topologies are concerned with how a network transfers frames.
• Physical topologies display the IP addressing scheme of each network.
• Logical topologies refer to how a network transfers information between devices.*

fifteen. Which method of data transfer allows information to be sent and received at the same time?

• full duplex*
• half duplex
• multiplex
• simplex

16.Which statement describes an extended star topology?

• End devices connect to a fundamental intermediate device, which in turn connects to other central intermediate devices.*
• Stop devices are continued together by a bus and each double-decker connects to a key intermediate device.
• Each finish system is connected to its respective neighbour via an intermediate device.
• All stop and intermediate devices are connected in a chain to each other.

17. Refer to the exhibit. Which statement describes the media admission control methods that are used past the networks in the showroom?

• All three networks utilise CSMA/CA
• None of the networks require media access command.
• Network 1 uses CSMA/CD and Network 3 uses CSMA/CA.*
• Network 1 uses CSMA/CA and Network 2 uses CSMA/CD.
• Network 2 uses CSMA/CA and Network three uses CSMA/CD.

xviii. What is independent in the trailer of a data-link frame?

• logical address
• physical address
• data
• error detection*

19. As data travels on the media in a stream of 1s and 0s how does a receiving node place the offset and terminate of a frame?

• The transmitting node inserts start and end $.25 into the frame.*
• The transmitting node sends a beacon to notify that a information frame is attached.
• The receiving node identifies the beginning of a frame by seeing a physical address.
• The transmitting node sends an out-of-band betoken to the receiver nigh the beginning of the frame.

20. What is the function of the CRC value that is found in the FCS field of a frame?

• to verify the integrity of the received frame*
• to verify the physical address in the frame
• to verify the logical accost in the frame
• to compute the checksum header for the data field in the frame

21. Fill in the bare.
The termbandwidth indicates the capacity of a medium to deport information and it is typically measured in kilobits per second (kb/s) or megabits per second (Mb/s).

22. Fill up in the blank.
What acronym is used to reference the data link sublayer that identifies the network layer protocol encapsulated in the frame?LLC

23. Match the characteristics to the right type of fiber. (Not all options are used.)

Place de options in the post-obit order.
Multimode Fiber
LED as low-cal source*
several paths of calorie-free into the fiber*
generally used with LANs*
Single-mode Cobweb
but i ray of light into the cobweb*
generally used for campus courage*
laser equally calorie-free source*

24. Make full in the blank.
A physical topology that is a variation or combination of a point-to-bespeak, hub and spoke, or mesh topology is unremarkably known as a hybrid topology.

25. Which argument describes signaling at the physical layer?

• Sending the signals asynchronously means that they are transmitted without a clock signal.*
• In signaling, a 1 always represents voltage and a 0 e'er represents the absence of voltage.
• Wireless encoding includes sending a serial of clicks to circumscribe the frames.
• Signaling is a method of converting a stream of information into a predefined lawmaking

26. The throughput of a FastEthernet network is 80 Mb/southward. The traffic overhead for establishing sessions, acknowledgments, and encapsulation is 15 Mb/due south for the same time flow. What is the goodput for this network?

• 15 Mb/south
• 95 Mb/s
• 55 Mb/s
• 65 Mb/s*
• 80 Mb/s

27. How is the magnetic field cancellation effect enhanced in UTP cables?

• by increasing the thickness of the PVC sheath that encases all the wires
• by increasing and varying the number of twists in each wire pair*
• by increasing the thickness of the copper wires
• by decreasing the number of wires that are used to carry data

28. Which statement is correct well-nigh multimode fiber?

• Multimode cobweb cables carry signals from multiple connected sending devices.
• Multimode fiber commonly uses a light amplification by stimulated emission of radiation as a light source.
• SC-SC patch cords are used with multimode fiber cables.*
• Multimode fiber has a thinner core than single-mode fiber..

29. A network administrator is required to upgrade wireless access to finish users in a building. To provide data rates upwards to one.three Gb/s and still be backward uniform with older devices, which wireless standard should be implemented?

• 802.11n
• 802.11ac*
• 802.11g
• 802.11b

30. What is one main characteristic of the data link layer?

• It generates the electric or optical signals that stand for the 1 and 0 on the media.
• It converts a stream of data bits into a predefined code.
• It shields the upper layer protocol from existence aware of the concrete medium to be used in the communication.*
• It accepts Layer 3 packets and decides the path by which to forward a frame to a host on a remote network.

31. What are two characteristics of 802.xi wireless networks? (Choose 2.)

• They use CSMA/CA technology.*
• They use CSMA/CD technology.
• They are collision-complimentary networks.
• Stations can transmit at whatsoever fourth dimension.
• Collisions tin can exist in the networks.*

32. What is the purpose of the FCS field in a frame?

• to obtain the MAC address of the sending node
• to verify the logical address of the sending node
• to compute the CRC header for the information field
• to make up one's mind if errors occurred in the transmission and reception*

33. Fill up in the blank with a number.
10,000,000,000 b/s can also be written as x Gb/s.

34. Match the steps to the physical layer operations that occur when data is sent from one node and received at another node.

Sort elements
The physical layer encodes the frames ->Footstep ane*
The physical layer creates the signals that represent the $.25 in each frame ->Footstep 2*
The signals are sent on the media ane at a time. ->Step iii
The physical layer retrieves the individual signals from the media ->Step four
The physical layer restores the private signals to their bit representations ->Stride five*

35. Refer to the exhibit.

Which statement describes the media access control methods that are used by the networks in the exhibit?
All iii networks utilize CSMA/CA
None of the networks crave media access control.
Network 1 uses CSMA/CD and Network three uses CSMA/CA.**
Network 1 uses CSMA/CA and Network two uses CSMA/CD.
Network 2 uses CSMA/CA and Network 3 uses CSMA/CD.

More Resources

• CCNA Examination Answers Cisco Learning Network
• CCNA Oftentimes Asked Questions
• CCNA Examination Questions with Explanation
• CCNA Cyber Ops FAQ

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