NTT Test Questions & Answers
2024/2025
1. To transmit and receive within a network, not only must the signals be generated to conform to the
requirements of the transmission system and receiver, but there must also be some form of:
a. Signal conditioning to counteract attenuation
b. Synchronization between transmitter and receiver
c. Compression of information within the signal
d. Signal conversion based on bandwidth - ANSWERSb. Synchronization between transmitter and
receiver
1. The addition of control information to data is referred to as:
a. Encapsulation
b. Datagram
c. Header
d. Error correction - ANSWERSa. Encapsulation
1. Which is not a protocol data unit
a. Frame
b. IP Subnet
c. Packet
d. Segment - ANSWERSb. IP Subnet
1. How many layers are in the TCP/IP model
a. 5
b. 6
c. 7
d. 8 - ANSWERSa. 5
, 1. TCP and UDP number its segments with a sequence number, how does TCP use this information
differently than UDP
a. TCP uses this number to acknowledge the segment
b. TCP uses the next number to acknowledge the segment
c. TCP uses this number to reorder segments that are received out of order
d. TCP ignores this number and deals with the segments as they are received - ANSWERSc. TCP uses this
number to reorder segments that are received out of order
1. Checksums are used to:
a. Determine an even or odd parity
b. Check for errors
c. Calculate magic numbers
d. Calculate the hamming distance - ANSWERSb. Check for errors
1. WAN connections are limited to point-to-point connections:
a. True
b. False - ANSWERSb. False
1. A modem:
a. Encodes the digital data onto a carrier frequency
b. Encodes the digital data into different voltage levels
c. Encodes the digital data into phase shifts
d. Encodes the digital data into frequency shifts - ANSWERSa. Encodes the digital data onto a carrier
frequency
1. The spectrum of a signal is:
a. The wavelength of the signal
b. The range of frequencies that it contains
c. The data rate of the signal
2024/2025
1. To transmit and receive within a network, not only must the signals be generated to conform to the
requirements of the transmission system and receiver, but there must also be some form of:
a. Signal conditioning to counteract attenuation
b. Synchronization between transmitter and receiver
c. Compression of information within the signal
d. Signal conversion based on bandwidth - ANSWERSb. Synchronization between transmitter and
receiver
1. The addition of control information to data is referred to as:
a. Encapsulation
b. Datagram
c. Header
d. Error correction - ANSWERSa. Encapsulation
1. Which is not a protocol data unit
a. Frame
b. IP Subnet
c. Packet
d. Segment - ANSWERSb. IP Subnet
1. How many layers are in the TCP/IP model
a. 5
b. 6
c. 7
d. 8 - ANSWERSa. 5
, 1. TCP and UDP number its segments with a sequence number, how does TCP use this information
differently than UDP
a. TCP uses this number to acknowledge the segment
b. TCP uses the next number to acknowledge the segment
c. TCP uses this number to reorder segments that are received out of order
d. TCP ignores this number and deals with the segments as they are received - ANSWERSc. TCP uses this
number to reorder segments that are received out of order
1. Checksums are used to:
a. Determine an even or odd parity
b. Check for errors
c. Calculate magic numbers
d. Calculate the hamming distance - ANSWERSb. Check for errors
1. WAN connections are limited to point-to-point connections:
a. True
b. False - ANSWERSb. False
1. A modem:
a. Encodes the digital data onto a carrier frequency
b. Encodes the digital data into different voltage levels
c. Encodes the digital data into phase shifts
d. Encodes the digital data into frequency shifts - ANSWERSa. Encodes the digital data onto a carrier
frequency
1. The spectrum of a signal is:
a. The wavelength of the signal
b. The range of frequencies that it contains
c. The data rate of the signal
