Practice 12.4 Match the ATM data transfer classification to its definition 1. ABR a. Automatically adjust the cell rate to support 2 CBR time-sensitive data b. Moves a steady stream of ATM cells at a 3. UER predictable rate 4. VER 4. Moves cells at a variable rate, the rate of which 5. VBR-NRT depends on the type of data contained in each cell d. Moves cells at variable rate depending on the 6. VBR-RT cell's contents to support real-time audio and video transfers e. Most appropriate for file transfer Does not guarantee any speed or meet requirements of any special application such as multimedia or telephony Practice 12.5 For each of the following select the word that best completes the sentence. Terms may be used more than once. bandwidth shaper H.323 hard phone Quality of Service (QoS) Real-time Transport Protocol (RTP) Session Initiation Protocol (SIP) soft phone telephone gateway 1. An) is a specialized piece of equipment that connects a packet-style network communication system to a telephone system using the protocol. 2 The standard is an older telecommunication standard for audio, video, and data communications using IP or packet type networks defined by the International Telecommunication Union (ITU). 3. A(n) is used to prioritize network packets to ensure quality of service for time-sensitive applications such as VoIP. 4. The standard and protocol for initiating maintaining and terminating the exchange of volce, multimedia, gaming chat, and more is called 5. The does not carry the data, but rather establishes and maintains the session until the session is terminated. 6. A(n) is a physical telephonic device, and a(n) is a virtual telephonic device. 7. The is a standard and a protocol used to stream voice and video in real time. 8. The protocol gives time-sensitive packets, such as those carrying telephone conversations, a higher priority than data packets. Copyright Goodhears-Wilcox Co. Inc. May not be reproduced or posted to a publicly able wobalu windenentals Budy Guide Practice 12.6 For each of the following select the word that best completes the sentence. Terms may be used more than once. audio device configuration connection failure firewall impedance mismatch jitter latency protocol analyzer 1. One of the most common causes of VoIP echo is 2. A common example of is connecting a two wire local-loop telephone circuit to a four-wire telephone circuit. 3. One of the most common sources of VoIP problems is the computer's blocking the packets. 4. Performance issues are typically caused by ind 5. A complete failure of the VoIP system generally relates to an) between the destination and source. 6. Another reason for complete failure of the VolP system could be due to the microphone, speaker, or headset in other words, the 7. Dropping or losing packets causes and results in a choppy voice transmission. 8. A(n) can be used to verify the exchange of packets needed to support a VoIP service