Cisco Certified Network Associate : 640-802 Exam

Exam Number/Code: 640-802
Exam Name: Cisco Certified Network Associate

“Cisco Certified Network Associate”, also known as 640-802 exam, is a Cisco certification.
Preparing for the 640-802 exam? Searching 640-802 Test Questions, 640-802 Practice Exam, 640-802 Dumps?

With the complete collection of questions and answers, Pass4sure has assembled to take you through 394 Q&As to your 640-802 Exam preparation. In the 640-802 exam resources, you will cover every field and category in CCNA helping to ready you for your successful Cisco Certification.

QUESTION 24:
When files are transferred between a host and an FTP server, the data is divided
into smaller pieces for transmission. As these pieces arrive at the destination host,
they must be reassembled to reconstruct the original file. What provides for the
reassembly of these pieces into the correct order?
A. The sequence number in the TCP header
B. The Start Frame Delimiter in the 802.3 Preamble
C. The TTL in the IP header
D. The acknowledgement number in the segment header
E. The frame check sequence in the Ethernet frame trailer
Answer: A
Explanation:
The Transport layer can provide reliable networking via acknowledgments, sequencing,
and flow control.
Acknowledgments Delivered segments are acknowledged to the sender. If they are not
acknowledged, the sender will retransmit.
Sequencing Data segments are sequenced into their original order when they arrive at the
destination.
Flow Control Provides buffer controls that prevent packet flooding to the destination
host. Buffers store bursts of data for processing when the transmission is complete.
Layer 4 protocols include the following:
Transmission Control Protocol (TCP)
User Datagram Protocol (UDP)
Sequenced Packet Exchange (SPX)A reliable communications protocol created by
Novell NetWare
QUESTION 25:
DRAG DROP
You work as a network administrator at Certkiller .com.
Your boss, Mrs. Certkiller, is interested in the OSI layers. Match the terms with the
appropriate layer. Some options are not used.
Answer:
Explanation:
The Transport layer segments and reassembles data into a data stream. Services located
in the Transport layer segment and reassemble data from upper-layer applications and
unite it into the same data stream. They provide end-to-end data transport services and
can establish a logical connection between the sending host and destination host on an
internetwork.
TCP and UDP transport protocol lies on Transport Layer, which break down the data
coming from upper layer into segment.
Windows are used to control the amount of outstanding, unacknowledged
data segments that is also on Transport Layer.
Network Layer:
The Network layer (also called layer 3) manages device addressing, tracks the location of
devices on the network, and determines the best way to move data, which means that the
Network layer must transport traffic between devices that aren’t locally attached. Routers
(layer 3 devices) are specified at the Network layer and provide the routing services
within an internetwork.
Protocol Data Packets (PDU) on Network Layer is known as Packets. Routing and
Routed protocols are lies on Network Layer.
Routing Protocol: RIP, IGRP, EIGRP, OSPF, BGP
Routed Protocol: IP, IPX
QUESTION 26:
Refer to the following exhibit:
What data structure is described in the exhibit shown above?
A. IP datagram
B. TCP segment
C. Ethernet frame
D. UDP datagram
E. FDDI frame
F. Token Ring frame
G. None of the above
Answer: B

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Questions and Answers : 394 Q&As
Updated: 2008-08-25
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