CCNA 4 Exploration – Chapter 2

CHAPTER 2 – Correct Answers
Which statements correctly identify the role of intermediary devices in the network? (Choose three.)

> determine pathways for data
> retime and retransmit data signals
> manage data flows

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

> define the structure of layer specific PDU’s
> outline the functions necessary for communications between layers
> require layer dependent encapsulations

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

> identifies pieces of data as part of the same communication
> ensures that data pieces can be directed to the correct receiving end device
> enables the reassembly of complete messages

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

> supports error detection

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

> Physical
> Data Link

What is a PDU?

> a layer specific encapsulation

Which characteristic correctly refers to end devices in a network?

> originate data flow

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?”

> an end device

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

> Network B  WAN
> Network C  LAN
> Network A  LAN

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.
> A LAN provides network services and access to applications for users within a common organization.

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

> multiplexing

What is the primary purpose of Layer 4 port assignment?

> to identify the processes or services that are communicating within the end devices

What device is considered an intermediary device?

> Switch

Refer to the exhibit. Which term correctly identifies the device type that is included in the area B (GREEN AREA)?

> intermediary

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

> LAN

Which layer encapsulates the segment into packets?

> network

What can be identified by examining the network layer header?

> the destination host address

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

> E, F, H, I, J

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

> The physical address is added.

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

> detailing the components that make up the physical link and how to access it

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

> application, presentation, session, transport, network, data link, physical

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