CISCO CCNA4 - Chapter 2
CISCO CCNA4 - Chapter 2
Cisco CCNA 4 - Chapter 2
Network Access Layer? (Choose two.)
Network
Transport
* Physical
* Data Link
S ession
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
No address is added.
The logical address is added.
* The physical address is added.
The process port number is added.
file server
IP phone
laptop
printer
* switch
physical
data link
* network
transport
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
the destination device on the local media
* the path to use to reach the destination host
the bits that will be transferred over the media
the source application or process creating the data
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
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
10
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 of complete messages
tracks delay between end devices
11
Refer to the exhibit. Which networking term describes the data interleaving
process represented in the graphic?
piping
PDU
streaming
* multiplexing
encapsulation
12
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
13
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
14
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
15
Refer to the exhibit. Which term correctly identifies the device type that is
included in the green area?
source
end
transfer
* intermediary
16
Which 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).
17
Refer to the exhibit. What type of network is shown?
WAN
MAN
* LAN
WLAN
18
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
19
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
20
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
21
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 the functions necessary for communications between layers
limit hardware compatibility
* require layer dependent encapsulations
eliminate standardization among vendors