CCNA 1 Module 11 V3.1 Answers

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

Application

Presentation

Session

Transport

 

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

FTP

TFTP

SNMP

TCP

DHCP

 

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

SMTP

SNMP

FTP

TFTP

EIGRP

 

4. 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

 

5. 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

 

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

FTP

HTTP

TFTP

SMTP

POP

SNMP

 

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. 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

 

9. 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

 

10. 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

 

11. 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

 

12. If an application uses a protocol that exchanges data without using windowing or flow control and must rely on higher layer protocols for reliability, which protocol and transfer methods are being used?

UDP, connection-oriented

UDP, connectionless

TCP, connection-oriented

TCP, connectionless

 

13. 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.

 

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

19

20

21

22

 

15. hich Application layer protocol is widely used to support resolving host names to IP addresses?

FTP

SMTP

SNMP

DNS

HTTP

WWW