Cisco Network Academy Chapter 12~14

Cisco Network Academy Chapter 12~14

Question 1:
Which layer is responsible for data encryption?
A. Layer 7
B. Layer 6
C. Layer 5
D. Layer 4

Question 2:
What is it called when the session layer decides whether to use two-way simultaneous or two-way alternate communication?
A. expectational acknowledgement
B. dialogue separation
C. resynchronization
D. dialogue control

Question 3:
If one system uses EBCDIC and a second system uses ASCII, which layer provides the translation between the two different types of code?
A. Layer 6
B. Layer 5
C. Layer 4
D. Layer 3

Question 4:
What type of communication avoids interrupts by taking turns?
A. two-way simultaneous
B. two-way symmetric
C. two-way alternate
D. one-way continuous

Question 5:
What is the correct term for the sequence that synchronizes a connection at both ends before any user data is exchanged?
A. closed connection
B. segment retransmission
C. three-way handshake
D. sliding windows

Question 6:
Which layer of the OSI model has the primary duty of regulating the flow of information from source to destination reliably and accurately?
A. presentation
B. session
C. transport
D. network

Question 7:
The session layer establishes, manages, and terminates sessions between _____________.
A. networks
B. servers
C. applications
D. media

Question 8:
Which layer of the OSI model is responsible for the compression of files?
A. transport
B. session
C. presentation
D. application

Question 9:
At which OSI layer does TCP operate?
A. Layer 4
B. Layer 5
C. Layer 6
D. Layer 7

Question 10:
In a TCP segment, which field defines the number of octets a recipient is willing to accept?
A. flag
B. checksum
C. window
D. HLEN

Question 11:
Since TCP reassembles segments into complete messages, what happens if a sequence number is missing in the series?
A. The segment is dropped.
B. The missing segment is re-transmitted.
C. All segments are retransmitted from the beginning.
D. Sequence numbers are never checked when using TCP.

Question 12:
Which of the following is a main function of the presentation layer?
A. dialogue control
B. managing applications
C. windowing
D. data compression

Question 13:
What are two file formats used by the Internet applications to display still images?
A. WAV and HTML
B. PICT and MIDI
C. GIF and JPEG
D. MPEG and TIFF

Question 14:
Which of the following would be an example of an important Layer 5 protocol?
A. OSPF
B. NFS
C. IGRP
D. FTP

Question 15:
Which of the following would describe Transmission Control Protocol?
A. unreliable
B. connection-oriented
C. connectionless
D. Layer 3

Question 16:
What is the correct term for the orderly initiation, termination, and managing of communication?
A. dialogue separation
B. dialogue control
C. segmentation
D. expectational acknowledgement

Question 17:
Which of the following is a characteristic of TCP?
A. unreliable
B. connectionless
C. divides outgoing messages into segments
D. provides no software checking for segments

Question 18:
What file format acts as a set of directions that tell a web browser how to display and manage documents?
A. HTML
B. HTTP
C. MIDI
D. JPEG

Question 19:
Which simple protocol exchanges datagrams, without acknowledgements or guaranteed delivery?
A. TCP
B. ASP
C. TCP/IP
D. UDP

Question 20:
Which term refers to the amount of data that can be transmitted before receiving an acknowledgement?
A. window size
B. closed connection
C. two way handshake
D. expectational acknowledgement

Question 21:
What is ASCII and EBCDIC used to format?
A. graphics
B. text
C. digitized music
D. video

Question 22:
Which layer of the OSI model is responsible for presenting data in a form that the receiving device can understand?
A. transport
B. session
C. presentation
D. application

Question 23:
What type of communication is used when two messages can cross during a conversation?
A. two-way simultaneous
B. two-way continuous
C. two-way alternate
D. one-way alternate

Question 24:
Which ports are reserved by TCP and UDP for public applications?
A. numbers from 255 to 1023
B. numbers below 255
C. numbers above 1023
D. numbers from 0 to 1023

Question 25:
What is the term used when sound files are downloaded while they are playing?
A. Musical Instrument Digital Interface
B. EBCDIC
C. video streaming
D. streaming audio.