ENetwork Chapter 2 - CCNA Exploration (Version 4.0)

1 Which statements correctly identify the role of intermediary devices in the network? (Choose three.) 

# determine pathways for data  
  initiate data communications  
# retime(重新定时) and retransmit data signals  
  originate the flow of data  
# manage data flows  
  final termination point for data flow 

/*
Scoring Rule For:  correctness of response 
Option 1, Option 3, and Option 5 are correct.
1 point for each correct option.
0 points if more options are selected than required.  
Max Value = 3 

This item references content from the following areas: 
CCNA Exploration 
2.1.6 Network Media */

2 Select the statements that are correct concerning network protocols. (Choose three.) 

# define the structure of layer specific PDU's  
  dictate how to accomplish layer functions  
# outline(概述) the functions necessary for communications between layers  
  limit hardware compatibility  
# require layer dependent encapsulations  
  eliminate standardization among vendors  
 
/*
Scoring Rule For:  correctness of response 
Option 1, Option 3, and Option 5 are correct.
1 point for each correct option.
0 points if more options are selected than required.  
Max Value = 3 
 
This item references content from the following areas: 
CCNA Exploration 
2.3.2 Network Protocols */

3 What are the key functions of encapsulation? (Choose three.) 

  allows modification of the original data before transmission  
# identifies pieces of data as part of the same communication  
  enables consistent network paths for communication  
# ensures that data pieces can be directed to the correct receiving end device  
# enables the reassembly(重组的) of complete messages  
  tracks delay between end devices  
 
/*
Scoring Rule For:  correctness of response 
Option 2, Option 4, and Option 5 are correct.
1 point for each correct option.
0 points if more options are selected than required.  
Max Value = 3 
 
This item references content from the following areas: 
CCNA Exploration 
2.3.2 Network Protocols */

4 What is a primary function of the trailer information added by the data link layer encapsulation? 

# supports error detection  
  ensures ordered arrival of data  
  provides delivery to correct destination  
  identifies the devices on the local network  
  assists intermediary devices with processing and path selection  
 
/*
Scoring Rule For:  correctness of response 
2 points for Option 1
0 points for any other option  
Max Value = 2 
 
This item references content from the following areas: 
CCNA Exploration 
2.4.7 The OSI Model */

5 Which two layers of the OSI model have the same functions as the TCP/IP model Network Access Layer? (Choose two.) 

  Network  
  Transport  
# Physical  
# Data Link  
  Session  
 
/*
Scoring Rule For:  correctness of response 
Option 3 and Option 4 are correct.
1 point for each correct option.
0 points if more options are selected than required.  
Max Value = 2 
 
This item references content from the following areas: 
CCNA Exploration 
2.4.8 Comparing the OSI Model with the TCP/IP Model */

6 What is a PDU? 

  corruption of a frame during transmission  
  data reassembled at the destination  
  retransmitted packets due to lost communication  
# a layer specific encapsulation  
 
/*
Scoring Rule For:  correctness of response 
2 points for Option 4
0 points for any other option  
Max Value = 2 
 
This item references content from the following areas: 
CCNA Exploration 
2.3.3 Protocol Suites and Industry Standards */

7 Which characteristic correctly refers to end devices in a network? 

  manage data flows  
# originate data flow  
  retime and retransmit data signals  
  determine pathways for data  

/*
Scoring Rule For:  correctness of response 
2 points for Option 2
0 points for any other option  
Max Value = 2 
 
This item references content from the following areas: 
CCNA Exploration 
2.1.4 End Devices and their Role on the Network */

8 Refer to the exhibit. "Cell A" at IP address 10.0.0.34 has established an IP session with "IP Phone 1" at IP address 172.16.1.103. Based upon the graphic, which device type best describes the function of wireless device "Cell A?" 

  the destination device  
# an end device  
  an intermediate device  
  a media device  
 
/*
Scoring Rule For:  correctness of response 
2 points for Option 2
0 points for any other option  
Max Value = 2 
 
This item references content from the following areas: 
CCNA Exploration 
2.1.5 Intermediary Devices and their Role on the Network */

9 Refer to the exhibit. Which three labels correctly identify the network types for the network segments that are shown? (Choose three.) 

  Network A -- WAN  
# Network B -- WAN  
# Network C -- LAN  
  Network B -- MAN  
  Network C -- WAN  
# Network A -- LAN  
 
/*
Scoring Rule For:  correctness of response 
Option 2, Option 3, and Option 6 are correct.
1 point for each correct option.
0 points if more options are selected than required.  
Max Value = 3 
 
This item references content from the following areas: 
CCNA Exploration 
2.2.2 Wide Area Networks */

10 Which three statements best describe a Local Area Network (LAN)? (Choose three.)  

# A LAN is usually in a single geographical(地理的) area.  
# The network is administered by a single organization.  
  The connection between segments in the LAN is usually through a leased connection.  
  The security and access control of the network are controlled by a service provider.  
# A LAN provides network services and access to applications for users within a common organization.  
  Each end of the network is generally connected to a Telecommunication Service Provider (TSP).  
 
/*
Scoring Rule For:  correctness of response 
Option 1, Option 2, and Option 5 are correct.
1 point for each correct option.
0 points if more options are selected than required.  
Max Value = 3 
 
This item references content from the following areas: 
CCNA Exploration 
2.2.2 Wide Area Networks */

11 Refer to the exhibit. Which networking term describes the data interleaving process represented in the graphic?  

  piping  
  PDU  
  streaming  
  multiplexing  
# encapsulation  
 
/*
Scoring Rule For:  correctness of response 
2 points for Option 4
0 points for any other option  
Max Value = 2 
 
This item references content from the following areas: 
CCNA Exploration 
2.3.1 Rules that Govern Communications */

12 What is the primary purpose of Layer 4 port assignment? 

  to identify devices on the local media  
  to identify the hops between source and destination  
  to identify to the intermediary devices the best path through the network  
  to identify the source and destination end devices that are communicating  
# to identify the processes or services that are communicating within the end devices  
 
/*
Scoring Rule For:  correctness of response 
2 points for Option 5
0 points for any other option  
Max Value = 2 

This item references content from the following areas: 
CCNA Exploration 
2.5.4 Getting the Data to the Right Application */

13 What device is considered an intermediary device? 

  file server  
  IP phone  
  laptop  
  printer  
# switch  
 
/*
Scoring Rule For:  correctness of response 
2 points for Option 5
0 points for any other option  
Max Value = 2 
 
This item references content from the following areas: 
CCNA Exploration 
2.1.5 Intermediary Devices and their Role on the Network */

14 Refer to the exhibit. Which term correctly identifies the device type that is included in the area B? 

  source  
  end  
  transfer  
# intermediary(中间的，媒介物)  
 
/*
Scoring Rule For:  correctness of response 
2 points for Option 4
0 points for any other option  
Max Value = 2 
 
This item references content from the following areas: 
CCNA Exploration 
2.1.5 Intermediary Devices and their Role on the Network */

15 Refer to the exhibit. What type of network is shown? 

  WAN  
  MAN  
# LAN  
  WLAN  

/*
Scoring Rule For:  correctness of response 
2 points for Option 3
0 points for any other option  
Max Value = 2 
 
This item references content from the following areas: 
CCNA Exploration 
2.2.1 Local Area Networks */

16 Which layer encapsulates the segment into packets? 

  physical  
  data link  
# network  
  transport  
 
/*
Scoring Rule For:  correctness of response 
2 points for Option 3
0 points for any other option  
Max Value = 2 
 
This item references content from the following areas: 
CCNA Exploration 
2.4.5 Protocol Data Units and Encapsulation */

17 What can be identified by examining the network layer header? 

  the destination device on the local media  
# the destination host address  
  the bits that will be transferred over the media  
  the source application or process creating the data  
 
/*
Scoring Rule For:  correctness of response 
2 points for Option 2
0 points for any other option  
Max Value = 2 
 
This item references content from the following areas: 
CCNA Exploration 
2.5.3 Getting the Data through the Internetwork */

18 Refer to the exhibit. Which set of devices contains only end devices? 

  A, C, D  
  B, E, G, H  
  C, D, G, H, I, J  
  D, E, F, H, I, J  
# E, F, H, I, J  
 
/*
Scoring Rule For:  correctness of response 
2 points for Option 5
0 points for any other option  
Max Value = 2 
 
This item references content from the following areas: 
CCNA Exploration 
2.1.4 End Devices and their Role on the Network */

19 During the encapsulation process, what occurs at the data link layer? 

  No address is added.  
  The logical address is added.  
# The physical address is added.  
  The process port number is added.  
 
/*
Scoring Rule For:  correctness of response 
2 points for Option 3
0 points for any other option  
Max Value = 2 

This item references content from the following areas: 
CCNA Exploration 
2.5.2 Getting the Data to the End Device */

20 What is the purpose of the TCP/IP Network Access layer? 

  path determination and packet switching  
  data representation, encoding, and control  
  reliability, flow control, and error detection  
# detailing the components that make up the physical link and how to access it  
  the division of segments into packets  
 
/*
Scoring Rule For:  correctness of response 
2 points for Option 4
0 points for any other option  
Max Value = 2 
 
This item references content from the following areas: 
CCNA Exploration 
2.4.3 The TCP/IP Model */

21 What is the proper order of the layers of the OSI model from the highest layer to the lowest layer? 

  physical, network, application, data link, presentation, session, transport  
  application, physical, session, transport, network, data link, presentation  
  application, presentation, physical, session, data link, transport, network  
# application, presentation, session, transport, network, data link, physical  
  presentation, data link, session, transport, network, physical, application  
 
/*
Scoring Rule For:  correctness of response 
2 points for Option 4
0 points for any other option  
Max Value = 2 
*/