Question: The session layer in the OSI model is responsible for:
Error control.
Creating and terminating connections.
Specifying end user needs.
Tracking cookies.
Answer: Creating and terminating connections.
Question: The novelty of packet switching is that:
It allows all users to be connected to all other users simultaneously.
It allowed instantaneous long-distance communications for the first time.
None of the above.
It enabled long-distance voice communication for the first time.
Answer: It allowed instantaneous long-distance communications for the first time.
Question: A communication socket or Internet socket is defined by a(n):
Answer Options:
Port address
IP address and port address together
None of the above
IP address
Answer: IP address and port address together
Question: Modulation is the process of:
Answer Options:
Increasing the frequency of a sine wave.
Changing one or more properties of a sine wave in response to data.
Increasing the amplitude of a sine wave.
Spinning a wheel to generate a sine wave.
Answer: Changing one or more properties of a sine wave in response to data.
Question: Good signals have all the following properties except:
Answer Options:
Good signals are efficient at using bandwidth.
Good signals do not need to be multiplexed.
Good signals are resistant to noise.
Good signals are easy to detect at the receiver’s end.
Answer: Good signals do not need to be multiplexed.
Question: The sequence numbers added by TCP to every datagram enable the detection of:
Answer Options:
Lost segments
Duplicate segments
A and C
A and B
Bit level errors
Answer: A and C (Lost segments and Duplicate segments)
Question: The novelty of switching is that:
It allows one wire to connect a user to multiple destinations.
It breaks data down into small units of information.
It allows instantaneous long-distance communications.
It allows one wire to carry multiple signals simultaneously.
Answer: It allows one wire to connect a user to multiple destinations.
Question: Switches improve the efficiency of Ethernets by:
Answer Options:
Speeding transmission rates
Reducing errors
Reducing collisions
Improving signals
Answer: Reducing collisions
Question: Signaling is:
Answer Options:
Converting data to signals for transmission over physical media
The transmission path over which electrical transmission properties
Combining multiple signals for transmission over one medium
Wiring cables between locations
Answer: Converting data to signals for transmission over physical media
Question: Binary signals are preferred over other forms of signals (ternary, decimal etc) because:
Answer Options:
Binary signals are the easiest to generate for the sender.
Binary signals can carry the most amount of information in a given time period.
Binary signals are the easiest to detect reliably by the receiver.
Binary signals are the fastest known means of transmitting data.
Answer: Binary signals are the easiest to detect reliably by the receiver.
Question: The term UTP stands for:
Answer Options:
Uncovered telephone pair
Unshielded telephone pair
Uncovered twisted pair
Unshielded twisted pair
Answer: Unshielded twisted pair
Question: The mechanism used for flow control in TCP is:
Answer Options:
Three-way handshake
Sliding window
Stop-and-wait
CSMA/CD
Answer: Sliding window
Question: In TDM (Time Division Multiplexing):
Answer Options:
Signals from each channel are sent at a specified amplitude.
Signals from each channel are sent at a specified phase/delay.
Signals from each channel are sent at a specified time.
Signals from each channel are sent at a specified frequency.
Answer: Signals from each channel are sent at a specified time.
Question: Flow control in TCP is used to:
Answer Options:
Slow down the receiver if necessary
Speed up the sender if necessary
Speed up the receiver if necessary
Slow down the sender if necessary
Answer: Slow down the sender if necessary
Question: A cookie on the Internet is
Answer Options:
A Trojan virus placed on a user’s computer by a website
An additional discount offered to large buyers on a website
A hidden feature that can be accessed by completing specific actions on a site
A unique identifier saved on a user’s browser by a website
Answer: A unique identifier saved on a user’s browser by a website
Question: When the browser requests a web page using HTTP, it typically specifies
Answer Options:
Only its own identification
None of the above
The file name of the web page requested along with some useful information about itself
Only the file name of the web page requested
Answer: Only the file name of the web page requested
Question: Switches discover the MAC addresses of computers connected on the different ports by looking at the:
Answer Options:
Source address of outgoing packets
Destination address of incoming packets
Source address of incoming packets
Destination address of outgoing packets
Answer: Source address of incoming packets