CBT Broadcast Networking & IP Systems 3

Question 1

What does the acronym SDN stand for in the context of modern broadcast facilities, and what is its benefit?

Accepted Answer

Software-Defined Networking — allows network configuration and routing via software rather than manual hardware configuration

Answer

Software-Defined Networking (SDN) centralizes network control in software, allowing broadcast engineers to dynamically reconfigure routing, bandwidth, and policies without physically touching switch hardware.

Question 2

Which Quality of Service (QoS) mechanism is most critical for prioritizing time-sensitive media traffic in a broadcast IP network?

Accepted Answer

DSCP (Differentiated Services Code Point) marking

Answer

DSCP marking classifies packets so network switches and routers can prioritize media traffic, ensuring low latency and minimal jitter for time-sensitive video and audio streams.

Question 3

In broadcast IP systems, what is the significance of the 'buffer delay' parameter when configuring an RTP receiver?

Accepted Answer

It defines the amount of time the receiver waits to accommodate network jitter before presenting the stream

Answer

Buffer delay (dejitter buffer) allows the receiver to absorb variations in packet arrival times (jitter) caused by network conditions, presenting a smooth, continuous stream to downstream equipment.

Question 4

What is the purpose of the AMWA (Advanced Media Workflow Association) IS-05 specification?

Accepted Answer

Providing a RESTful API for making and breaking connections between NMOS-compatible devices

Answer

AMWA IS-05 (Device Connection Management) defines a RESTful API for connecting and disconnecting senders and receivers in an NMOS-compatible IP broadcast environment.

Question 5

Which physical layer technology is most commonly used for 10GbE and 25GbE links within a broadcast IP facility's core infrastructure?

Accepted Answer

Single-mode fiber optic cabling

Answer

Single-mode fiber optic cabling supports 10GbE, 25GbE, and higher speeds over long distances with low latency and is the dominant physical layer in professional broadcast IP facilities.

(CBT) Certified Broadcast Technician Practice Test

(CBT) Certified Broadcast Technician Practice Test

CBT Broadcast Networking & IP Systems 3