CCNA 1 Chapter 4

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. Step 1 Step 2 Step 3 Step 4 Step 5

1) The physical layer encodes the frames 2) The physical layer passes the packets up to the internet layer. The physical layer creates signals that represent the bits in each frame 3) The signals are sent on the media 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.

10,000,000,000 b/s can also be written as __________

10 Gb/s

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

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

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

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.)

Coverage Area, Interference, and Security

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

Data link

Which two factors influence the method that is used for media access control? (Choose two.)

How the connection between nodes appears to the data link layer and how nodes share the media

Which two engineering organizations define open standards and protocols that apply to the data link layer?

ISO & ITU

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 determine the media access control method used.

What is true concerning physical and logical topologies?

Logical topologies refer to how a network transfers data between devices

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? (Choose two.)

RFI & EMI

Which statement is correct about multimode fiber?

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

Which statement describes signaling at the physical layer?

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

What is a characteristic of a WAN hub-and-spoke topology?

The branch sites are connected to a central sites through point-to-point links

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.

What is wrong with the displayed termination?

The untwisted length of each wire is too long.

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? (Choose two.)

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

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

to determine if errors occurred in the transmission and reception

What is the purpose of the physical link control field in a data link layer header?

to establish the media link

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

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

Which is a function of the Logical Link Control (LLC) sublayer?

to identify which network layer protocol is being used

When is a wired connection preferred to a wireless connection by an end-user device?

when the end-user device will run an application that requires a dedicated connection to the network