Annex E Exam 1 UPDATED ACTUAL
Exam Questions and CORRECT Answers
Define in writing Bit Error - CORRECT ANSWER - bit error or a bit that is transferred
from the source to the destination within the assigned time slot, but that when delivered is of a
different value from that sent from the source.
Define in writing Synchronization - CORRECT ANSWER - Synchronization is a
networking term that applies to a state where data or information arrives and departs from
connected devices at coordinated times so that data is neither lost nor jumbled.
Define in writing Slip - CORRECT ANSWER - A slip is the repetition or deletion of a
block of bits in a synchronous bit stream due to inadequate synchronization of the two clocks
controlling the transmission and reception of the signals that represent the symbols.
Define in writing Plesiochronous - CORRECT ANSWER - two networks operate with
clock sources of sufficiently high stability such that signals in the two networks are nearly
synchronous, the network is plesiochronous.
Define in writing Stratum - CORRECT ANSWER - The accuracy and stability of each
clock are such that there is almost complete coincidence in time-keeping and is classified in a
four-level hierarchy as defined by ANSI into stratum levels based on performance (quality or
accuracy over time).
Define in writing External Timing - CORRECT ANSWER - a timing reference obtained
from a source, such as a navigation system, external to the given system.
Define in writing the purpose of a Primary Reference Source - CORRECT ANSWER -
The master clocking source in a network is referred to as the Primary Reference Source (PRS).
Define in writing Clock Recovery Timing - CORRECT ANSWER - Distributed devices
derive or recover their clocking from the PRS via a received signal so that the entire network
Exam Questions and CORRECT Answers
Define in writing Bit Error - CORRECT ANSWER - bit error or a bit that is transferred
from the source to the destination within the assigned time slot, but that when delivered is of a
different value from that sent from the source.
Define in writing Synchronization - CORRECT ANSWER - Synchronization is a
networking term that applies to a state where data or information arrives and departs from
connected devices at coordinated times so that data is neither lost nor jumbled.
Define in writing Slip - CORRECT ANSWER - A slip is the repetition or deletion of a
block of bits in a synchronous bit stream due to inadequate synchronization of the two clocks
controlling the transmission and reception of the signals that represent the symbols.
Define in writing Plesiochronous - CORRECT ANSWER - two networks operate with
clock sources of sufficiently high stability such that signals in the two networks are nearly
synchronous, the network is plesiochronous.
Define in writing Stratum - CORRECT ANSWER - The accuracy and stability of each
clock are such that there is almost complete coincidence in time-keeping and is classified in a
four-level hierarchy as defined by ANSI into stratum levels based on performance (quality or
accuracy over time).
Define in writing External Timing - CORRECT ANSWER - a timing reference obtained
from a source, such as a navigation system, external to the given system.
Define in writing the purpose of a Primary Reference Source - CORRECT ANSWER -
The master clocking source in a network is referred to as the Primary Reference Source (PRS).
Define in writing Clock Recovery Timing - CORRECT ANSWER - Distributed devices
derive or recover their clocking from the PRS via a received signal so that the entire network
