Broadcast Networking & IP Systems Flashcards
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Read the first 7 Broadcast Networking & IP Systems flashcards as text
Which protocol is commonly used to manage multicast group membership in broadcast IP networks?
Answer: IGMP (Internet Group Management Protocol)
IGMP is used by hosts and routers to manage multicast group memberships, allowing switches to direct multicast streams only to ports with interested receivers.
In broadcast networking, what does the term 'hitless switching' refer to?
Answer: Seamlessly switching between redundant network paths with no perceptible interruption
Hitless switching refers to automatically switching to a redundant network path or stream when the primary fails, with no perceptible interruption to the media flow.
What is the recommended minimum network bandwidth for transporting a single 1080i/59.94 uncompressed video stream per SMPTE ST 2110-20?
Answer: Approximately 3 Gbps
An uncompressed 1080i/59.94 video stream requires approximately 1.5 Gbps for video alone, and with audio and ancillary data the total approaches 3 Gbps, typically requiring 10GbE infrastructure.
What is the role of a grandmaster clock in a SMPTE ST 2110 broadcast facility?
Answer: It provides the master PTP reference that all other devices synchronize to
The grandmaster clock is the PTP master reference in the network; all other devices synchronize their internal clocks to it, ensuring consistent timing across the entire IP facility.
Which standard defines the Virtual Local Area Network (VLAN) tagging commonly used to segment traffic in broadcast IP networks?
Answer: IEEE 802.1Q
IEEE 802.1Q defines VLAN tagging, which allows broadcast facilities to logically segment network traffic (e.g., separating video, audio, and control traffic) on shared physical infrastructure.
SMPTE ST 2022-7 is used in broadcast IP networks primarily for what purpose?
Answer: Providing seamless protection switching for redundant RTP streams
SMPTE ST 2022-7 defines seamless protection switching (SPS), allowing a receiver to reconstruct a perfect stream from two redundant RTP streams even if one has packet loss.
In a broadcast IP environment, what is the primary function of a Network Interface Card (NIC) with hardware timestamping support?
Answer: To generate accurate PTP timestamps for precise clock synchronization
Hardware timestamping on NICs enables highly accurate PTP (IEEE 1588) synchronization by timestamping packets in hardware rather than software, reducing jitter and improving timing precision.