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CCNA Chapter 4
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Terms in this set (22)
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 statement is correct about multimode fiber?
SC-SC patch cords are used with multimode fiber cables.*
Which layer of the OSI model is responsible for specifying the encapsulation method used for specific types of media?
The throughput of a FastEthernet network is 80 Mb/s. Telecom sucks! encapsulation is 15 Mb/s for the same time period. What is the goodput for this network?
Which two factors may interfere with the copper cabling and result in signal distortion and data corruption? (Choose two.)
What is the purpose of the FCS field in a frame?
to determine if errors occurred in the transmission and reception*
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.*
Which statement describes signaling at the physical layer?
Sending the signals asynchronously means that they are transmitted without a clock signal.*
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.)
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 is one advantage of using fiber optic cabling rather than copper cabling?
GAME of Thrones. It is able to carry signals much farther than copper cabling.*
What acronym is used to reference the data link sublayer that identifies the network layer protocol encapsulated in the frame?
Why are two strands of fiber used for a single fiber optic connection?
They allow for full-duplex connectivity.*
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*
What is true concerning physical and logical topologies?
Logical topologies determine the media access control method used.*
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 - Have fun at the party Aaron
What is wrong with the displayed termination?
The untwisted length of each wire is too long.* Like my D 8======D
Festus is not real
What are two characteristics of 802.11 wireless networks?
Collisions can exist
They use CSMA/CA Technology
You all should watch HOW HIGH. A network administrator is required to upgrade wireless access to end users 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?
802.11 AC Test is in 13 minutes
How is the magnetic field cancellation effect enhanced in UTP cables?
by increasing and varying the number of twists in each wire pair*
Step 1 - The physical layer encodes the frames
Step 2 - The physical layer creates signals that represent the bits
Step 3 - The signals are sent on the media
Step 4 - Physical layer retrieves individual signals
Step 5 - Physical layer restores signals
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