Answers CCNA I Chapter 2 (v4.0)



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

determine pathways for data

initiate data communications

retime and retransmit data signals

originate the flow of data

manage data flows

final termination point for data flow



2Select 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 the functions necessary for communications between layers 

limit the need for hardware compatibility

require layer dependent encapsulations 

eliminate standardization among vendors


3What are two functions of encapsulation? (Choose two.)
tracks delay between end devices
enables consistent network paths for communication
allows modification of the original data before transmission

identifies pieces of data as part of the same communication 
ensures that data pieces can be directed to the correct receiving end device




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



5Which 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



6What is a PDU?
corruption of a frame during transmission
data reassembled at the destination
retransmitted packets due to lost communication

a layer specific encapsulation



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

originate data flow 

retime and retransmit data signals
determine pathways for data



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



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



10Which three statements best describe a Local Area Network (LAN)? (Choose three.)
A LAN is usually in a single geographical 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).



11.












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

multiplexing

encapsulation


12What 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


13What device is considered an intermediary device?
file server
IP phone
laptop 
printer

switch


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

15.
































Refer to the exhibit. What type of network is shown?
WAN
MAN
LAN
WLAN



16Which layer encapsulates the segment into packets?
physical
data link
network
transport



17What 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



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



19During 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.



20What is the purpose of the TCP/IP Network Access layer?
path determination and packet switching
data presentation
reliability, flow control, and error detection
network media control
the division of segments into packets



21What 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

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