SONET Quiz

Synchronous Optical Network - Communication Engineering

12 Questions Total
Undergraduate Level
Communication Engineering
Post-Test Review
1
What is the basic transmission rate of SONET STS-1 signal?
A. 155.52 Mbps
B. 51.84 Mbps
C. 622.08 Mbps
D. 2.488 Gbps
2
Which organization developed the SONET standard?
A. ITU-T
B. IEEE
C. ANSI (American National Standards Institute)
D. ISO
3
What does the SONET acronym OC stand for?
A. Optical Carrier
B. Optical Channel
C. Optical Circuit
D. Optical Connection
4
How many layers does the SONET architecture define?
A. Three (Physical, Data Link, Network)
B. Two (Section and Line)
C. Five (like OSI model)
D. Four (Photonic, Section, Line, and Path)
5
What is the duration of a SONET frame transmission?
A. 250 μs
B. 125 μs
C. 1 ms
D. 62.5 μs
6
Which SONET network topology provides automatic protection switching with self-healing capabilities?
A. Linear topology only
B. Mesh topology
C. Ring topology (BLSR or UPSR)
D. Star topology
7
What is the line rate of OC-12 in SONET hierarchy?
A. 622.08 Mbps
B. 155.52 Mbps
C. 2.488 Gbps
D. 9.953 Gbps
8
What does an Add-Drop Multiplexer (ADM) allow in a SONET network?
A. Only adding signals to the network
B. Only dropping signals from the network
C. Converting optical signals to electrical only
D. Adding or dropping lower-rate signals without demultiplexing the entire signal
9
Which overhead in SONET is responsible for end-to-end communication between path terminating equipment?
A. Section Overhead (SOH)
B. Path Overhead (POH)
C. Line Overhead (LOH)
D. Transport Overhead (TOH)
10
What is the primary difference between SONET and SDH (Synchronous Digital Hierarchy)?
A. SONET is asynchronous while SDH is synchronous
B. SONET uses electrical signals while SDH uses optical signals
C. SONET starts at 51.84 Mbps (OC-1) while SDH starts at 155.52 Mbps (STM-1)
D. SONET is used only in Europe while SDH is used in North America
11
How many DS-1 signals can an STS-1 payload accommodate?
A. 28 DS-1 signals
B. 24 DS-1 signals
C. 84 DS-1 signals
D. 672 DS-1 signals
12
What is the function of the H1 and H2 bytes in the SONET Line Overhead?
A. Error detection and correction
B. Synchronization status messages
C. Automatic protection switching commands
D. Pointer bytes indicating the start of the SPE
0/12 Correct

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