Examen cisco 4.0

http://elmaestrodelared.blogspot.com

CCNA Exploration 4.0: (I) Network Fundamentals

Chapter 2: Communications over the Networks

1
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

2
What is a primary function of the trailer information added by the data link layerencapsulation?
* 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

3
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.
Theprocess port number is added.

4
What device is considered an intermediary device?
file server
IP phone
laptop
printer
* switch

5
Which layer encapsulates the segment into packets?
physical
* data link
network
transport

6
Which 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

7
What can be identified by examining the network layer header?
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

8What 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

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

10
What are the key functions of encapsulation? (Choosethree.)
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 termdescribes 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 sessionwith "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 theexhibit. 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...