1. The following are types of multi-media networking applications except A) text
ID: 3674848 • Letter: 1
Question
1.
The following are types of multi-media networking applications except
A) text messaging and web page downloads (live, real-time texting and data transfer)
B) streaming, stored audio and video (YouTube, Netflix, Hulu)
C) conversational voice/video over IP (Skype, Polycom, H.323)
D) streaming live audio, video (live sporting events, live view of security cameras)
2.
When combining mutlimedia over a network
A) the network will automatically prefer data traffic over multimedia traffic
B) bursty data traffic will wait, allowing any multimedia traffic to go first
C) bursty data traffic can interfere with multimedia traffic, even if the multimedia only needs a very small amount of bandwidth
D) the network will automatically prefer mutlimedia traffic over data traffic
3.
The H.323 protocol
A) is an alternative standard for voice and video over IP networks
B) has a "web flavor" as opposed to SIP's has "telephony flavor"
C) replaces RTP for real-time muli-media
D) replaces SIP for VoIP
4.
For multimedia On TCP/IP networks,
A) bandwidth consumption is guaranteed by the Real Time Protocol (RTP) on top of the TCP transport protocol
B) bandwidth consumption is managed with a strict quality of service (QoS) algorithm offering CBR and VBR contracts on connections
C) there are no protocols available to manage multimedia over TCP/IP
D) the Real Time Protocol (RTP) runs on top of the UDP transport protocol, which determines packet structure, time stamping and sequencing
5.
The SIP protocol
A) allows bandwidth consumption in small amounts, like SIPping coffee
B) is a protocol standard for real-time telephony over the Internet
C) has the vision of people being represented by IP addresses or telephone numbers instead of names or email addresses
D) requires the caller to be on a wired internet connection with a static IP address
6.
For Skype calls
A) an open-source protocol is used
B) audio and video is sent directly between hosts, who call each other via IP address
C) a central Skype server handles login and supernodes (SNs) share IP addresses of users
D) all audio and video goes to a centralized Skype Server
7.
Voice over IP (VoIP) telephony services
A) need end-to-end delay of >400 ms
B) need end-to-end delay of <150 ms
C) have to resolve telephone numbers to IP address somehow
D) don't have to worry about 911 services because all 911 centers use VoIP by law
8.
Multimedia networking generally uses the UDP protocol
A) because UDP means Un-Delayed Protocol
B) but UDP is often blocked by default firewall configuration for security reasons
C) this increases playout delay which decreases network jitter
D) this makes the video and audio streaming faster
9.
Content distribution networks
A) resolve the problems of streaming stored content out to lots of simultaneous users by using distributed servers
B) resolve the issue of network bandwidth by using UDP instead of TCP
C) resolve the issue of serving videos across the network with geographically centralized servers
D) resolve the issue of network consumption by using a peer-to-peer approach
10.
Streaming video has the main issue of
A) reservation of sufficient bandwidth to send the audio stream
B) variable network delays such as jitter, requiring buffering at the client/receiver end
C) real-time bi-directional audio being played back as echo
D) immediate replay of the data that has been encoded
Explanation / Answer
1.
A) text messaging and web page downloads (live, real-time texting and data transfer)
2.
C) bursty data traffic can interfere with multimedia traffic, even if the multimedia only needs a very small amount of bandwidth
3. D) replaces SIP for VoIP
4. D) the Real Time Protocol (RTP) runs on top of the UDP transport protocol, which determines packet structure, time stamping and sequencing
5. B) is a protocol standard for real-time telephony over the Internet
6. B) audio and video is sent directly between hosts, who call each other via IP address
7.D) don't have to worry about 911 services because all 911 centers use VoIP by law
8. D) this makes the video and audio streaming faster
9. B) resolve the issue of network bandwidth by using UDP instead of TCP
10. B) variable network delays such as jitter, requiring buffering at the client/receiver end
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