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CCNA 1 - Chapter 4 (Part 1)  

created by karen.ura… on 19 Dec 13
Medium level (65% of success)    30 questions - 402 players
Chapter 4 (Part 1)
 
1
Which layer of the OSI model is responsible for specifying the encapsulation method used for specific types of media?
   
   
   
2
Which statement describes signaling at the physical layer?
   
   
   
3
Data signals are sent along with a clock signal which occurs at evenly spaced time durations referred to as the bit time; how is this called?
   
   
   
4
Data signals are transmitted without an associated clock signal; how is this called?
   
   
   
5
The method of representing the bits is called the ________.
   
   
   
6
A 0 is represented by a high to low voltage transition and a 1 is represented as a low to high voltage transition; that's _________.
   
   
7
A 0 may be represented by one voltage level on the media and a 1 might be represented by a different voltage on the media. We call this ______.
   
   
8
________ refers to the amount of time, to include delays, for data to travel from one given point to another.
   
   
   
9
__________ measures the amount of data that can flow from one place to another in a given amount of time.
   
   
   
10
_________ the measure of the transfer of bits across the media over a given period of time.
   
   
   
11
_________ is the measure of usable data transferred over a given period of time. _______ is throughput minus traffic overhead for establishing sessions, acknowledgements, and encapsulation.
   
   
   
12
What is one of the reasons for physical layer protocols to use frame encoding techniques?
   
   
   
13
What is one of the reasons for physical layer protocols to use frame encoding techniques?
   
   
   
14
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?
   
   
   
15
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?
   
   
   
16
How is the magnetic field cancellation effect enhanced in UTP cables?
   
   
   
17
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?
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?
   
   
   
18
A Cisco proprietary cable used to connect to a router or switch console port is a _________.
   
   
   
19
Which statement is correct?
Which statement is correct?
   
   
   
20
Which statement is correct about multimode fiber?
   
   
   
21
Sometimes referred to as square connector or standard connector. It is a widely adopted LAN and WAN connector that uses a push-pull mechanism to ensure positive insertion. This connector type is used with multimode and single-mode fiber.
   
   
   
22
Sometimes called a little or local connector, is quickly growing in popularity due to its smaller size. It is used with single-mode fiber and also supports multimode fiber.
   
   
   
23
What is one advantage of using fiber optic cabling rather than copper cabling?
   
   
   
24
Single-mode or multimode? Uses LEDs as a data light source transmitter.
   
   
25
Single-mode or multimode? Uses lasers in a single stream as a data light source transmitter.
   
   
26
Why are two strands of fiber used for a single fiber optic connection?
   
   
   
27
Both devices can both transmit and receive on the media but cannot do so simultaneously.
   
   
28
Both devices can transmit and receive on the media at the same time.
   
   
29
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?
   
   
   
30
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?
   
   
   

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