CCNA Module 11

1 What three pieces of information does the transport layer use to manage the communication of separate data streams between hosts? (Choose three.)

*port numbers
checksum values
authentication keys
*sequence numbers
encryption algorithms
*acknowledgment numbers


2 When the receiving workstation detects an error in the data it has received, it does not acknowledge receipt of the data. The source workstation retransmits the unacknowledged data. Which layer of the OSI model supports this process of retransmission?

network
application
session
*transport


3 FTP provides a reliable, connection-oriented service for transferring of files. Which transport layer protocol is used for data transfer when this service is being used?

TFTP
*TCP
DNS
IP
UDP


4 What are the features of the User Datagram Protocol (UDP). (Choose three.)

*no guaranteed delivery of datagrams
connection-oriented
provides reliable full-duplex data transmission
*reliability provided by the application layer
*connectionless
utilizes sliding windowing techniques


5 Which layer of the OSI model can provide a connection-oriented, reliable data transfer between two hosts?

Application
Presentation
Session
*Transport


6 Which Application layer protocol is widely used to support resolving host names to IP addresses?

FTP
SMTP
SNMP
*DNS
HTTP
WWW


7 What does the http portion of the URL http://www.cisco.com/edu/ communicate to a web browser?

The web browser needs to locate the www server.
The address is located on a site whose name is http.
*The web browser is notified as to which protocol to use.
The http portion represents the type of web browser that needs to be used.


8 Which application layer protocol allows network devices to exchange management information?

SMTP
*SNMP
FTP
TFTP
EIGRP




9 Which port numbers are commonly assigned for FTP use? (Choose two.)

19
*20
*21
22



10 An application is using a protocol that exchanges data without using windowing or flow control and must rely on higher layer protocols to transmit data. Which protocol and transfer method are being used?

UDP, connection-oriented
*UDP, connectionless
TCP, connection-oriented
TCP, connectionless
11 TCP is referred to as connection-oriented. What does this mean?

TCP uses only LAN connections.
TCP requires devices to be directly connected.
*TCP negotiates a session for data transfer between hosts.
TCP reassembles the data steams in the order that it is received.




12 Which of the following are primary duties of the OSI transport layer? (Choose two.)

path determination
*end-to-end connectivity
*flow control
security control
data representation
encryption of data


13 What is the purpose of TCP/UDP port numbers?

indicate the beginning of a three-way handshake
reassemble the segments into the correct order
identify the number of data packets that may be sent without acknowledgment
*track different conversations crossing the network at the same time


14 Which protocol is used by e-mail servers to communicate with each other?

FTP
HTTP
TFTP
* SMTP
POP
SNMP


15 Which protocol is used to transfer files from computer to computer but is considered connectionless?

FTP
*TFTP
SNMP
TCP
DHCP