CCNA 1 V6.0 Chapter 4 Test

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

1 - rollover 2 - straight-through 3 - crossover

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

1. the physical layer encodes the frames 2. the physical layer creates the signals that represent the bits in each frame 3. The signals are sent on the media one at a time. 4. The physical layer retrieves the individual signals from the media 5. The physical layer restores the individual signals to their bit representations

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

65 Mb/s

A network administrator is required to upgrade wireless access to end user in a building. To provide data rates up to 1.3 Gb/s and still be backward compatible with older devices, which wireless standard should be implemented?

802.11ac

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

Data link

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 two factors may interfere with the copper cabling and result in signal distortion and data corruption?

EMI RFI

Which statement describes an extended star topology?

End devices connect to a control intermediate device, which in turn connects to other central intermediate devices.

What is one advantage of using fiber optic cabling rather than copper cabling?

It is able to carry signals much farther than copper cabling.

What is one main characteristic of the data link layer?

It shields the upper layer protocol from being aware of the physical medium to be used in the communication

What acronym is used to reference the data link sublayer that identifies the network layer protocol encapsulated in the frame?

LLC

What is true concerning physical and logical topologies?

Logical topologies refer to how a network transfers data between devices.

Match the characteristics to the correct type of fiber

MULTIMODE FIBER LED as light source several paths of light into the fiber generally used with LANs SINGLE-MODE FIBER only one ray of light into the fiber generally used for campus backbone laser as light source

Which statement describes the media access control methods that are used by the networks in the exhibit?

Network 1 uses CSMA/CD and Network 3 uses CSMA/CA

Refer to the exhibit. Which statement describes the media access control methods that are used by networks in the exhibit?

Network 1 uses CSMA/CD and Network 3 uses CSMA/CA.

Which type of connector does a network interface card use?

RJ-45

Which statement is correct about multimode fiber?

SC-SC patch cords are used with multimode fiber cables.

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

Security. Interference. coverage area.

Which statement describes signaling at the physical layer?

Sending the signals asynchronously means that they are transmitted without a clock signal.

As data travels on the media in a stream of 1s and 0s, how does a receiving node identify the beginning and end of a frame?

The transmitting node inserts start and stop bits into the frame.

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

They allow for full-duplex connectivity.

What are two characteristics of 802.11 wireless networks?

They use CSMA/CA technology. Collisions can exist in the networks.

The term "____________________" indicates the capacity of a medium to carry data and it is typically measured in kilobits per second (kb/s) or megabits per second (Mb/s).​

bandwidth

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

by increasing and varying the number of twists in each wire pair.

What is contained in the trailer of a data-link frame?

error detection.

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

full duplex

A physical topology that is a variation or combination of point-to-point, hub and spoke, or mesh topology is commonly known as a _____________ topology.

hybrid

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

it accepts Layer 3 packets and encapsulates them into frames. It provides media access control and performs error detection.

What are two examples of hybrid topologies? (Choose two.)

partial mesh extended star

What is the definition of bandwidth?

the amount of data that can flow from one place to another in a given amount of time.

Which characteristic describes crosstalk?

the distortion of the transmitted messages from signals carried in adjacent wires.

What is indicated by the term throughput

the measure of the bits transferred across the media over a given period of time

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

the untwisted length of each wire is too long.

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

to determine if errors occurred in the transmission and reception.

What are two reasons for physical layer protocols to use frame encoding techniques?

to distinguish data bits from control bits to identify where the frame starts and ends

What is a role of the Logical Link Control sublayer

to mark frames to identify the network layer protocol being carried.

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

What technique is used with UTP cable to help protect against signal interference from crosstalk?

twisting the wires together into pairs