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Which two statements are true about Voice over IP （VoIP） packet delivery in a digital infrastructure？ （）
- A、 Packets can arrive out of order.
- B、 Packets must take the same path to the destination.
- C、 Once packets are received at the destination router， the router performs sampling to ensure the quality of the voice traffic.
- D、 Packets can experience varying delays across the network.
- E、 Packets containing voice samples are sequentially numbered by default， allowing for reordering upon arrival at the terminal router along the path.
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更多 “Which two statements are true about Voice over IP （VoIP） packet delivery in a digital infrastructure？ （）A、 Packets can arrive out of order.B、 Packets must take the same path to the destination.C、 Once packets are received at the destination router， the router performs sampling to ensure the quality of the voice traffic.D、 Packets can experience varying delays across the network.E、 Packets containing voice samples are sequentially numbered by default， allowing for reordering upon arrival at the terminal router along the path.” 相关考题
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【A popular service that has attercted the interest of companies and has home users alike is the sending of voice signals over an IP-based network, such as the Internet. The practice of making telephone calls over the internet has had a number of different names, including packet voice, voice over packet, voice over the internet, internet telephone, and Voice over Ip（Voip）. But it appears the industry has settled on the termVoice ove IP in reference to the internet protocol, which controls the transfer of data over the internet. There are currently three ways to deliver VoIp to users, the first technique is found at the corporate level. Many companies are offering VoIP systerms that operate over a local area network. These systems involve a fair amount of equipment, such as VoIP servers, special IP-enabled telephones, and routers that can direct telephone calls. Today a large portion of corporate sites have converted their older internal telephone systems to VoIP systems that opreate over a LAN, thus converging two systems into one. A second common solution is the one often encountered at home. Using existing telephones, a special converter is added between the telephone and a high speed internet（DSL or cable modem）connection. The converter digitizes the voice signal and creates a stream of packets that are then sent over an ip connection.The third technique involves smart cell phones. Never cell technologies are all packet-based, thus requiring a telephone call to be converted to digital packets and sending those packets over IP networks.】From the paragraph above，a popular service that has attracetd the interest of companies and home users,is termed as （） . The data transfer over the Internet is controlled by the （） . At corporate level, many companies have replaced their older internal telephone systerms with （） that oprerate over a local area network.A、voice over the internet B、voice over packet C、Voice over IP D、internet telephony A、packet B、internet protocol C、industry D、VoIp servers A、VoIP systems B、IP-enablde telephones C、VoIP servers D、routers
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Which two statements are true about the primary address on an interface? （）A、It is the address used by default as the local address for broadcast and multicast packets sourced locally and sent out of the interfaceB、You use the primary address when you have multiple IP addresses belonging to the same subnet on the same intefaceC、It can be useful for selecting the local address used for packets sent out of unnumbered interfaces when multiple non-127 addresses are configured on the loopback interfaceD、By default, the primary address on an interface is selected as the nmerically highest local address configured on the interface
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多选题VOIP has been implemented at the main office of the Company network. Which two statements are true about voice packets in a LAN？（）AVoice carrier stream utilizes Real-Time Transport Protocol (RTP) to carry the audio/media portion of the VoIP communication.BVoice traffic data flow involves large volumes of large packets.CBecause a packet loss involves a small amount of data, voice traffic is less affected by packet losses than traditional data traffic is.DVoice packets are encapsulated in TCP segments to allow for proper sequencing during delivery.EVoice packets are very sensitive to delay and jitter.
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多选题Which two statements are true about TCP communication?（）AThe receiver acknowledges the final packet in each communications stream.BThe receiver adds sequencing numbers to the packets received.CThe sender adds sequencing numbers to the packets it sends.DThe receiver acknowledges each packet it receives from the sending device.
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多选题Which two statements are true about the primary address on an interface? （）AIt is the address used by default as the local address for broadcast and multicast packets sourced locally and sent out of the interfaceBYou use the primary address when you have multiple IP addresses belonging to the same subnet on the same intefaceCIt can be useful for selecting the local address used for packets sent out of unnumbered interfaces when multiple non-127 addresses are configured on the loopback interfaceDBy default, the primary address on an interface is selected as the nmerically highest local address configured on the interface
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多选题Which two statements are true about the primary address on an interface?（）AIt is the address used by default as the local address for broadcast and multicast packets sourced locally and sent out of the interface.BYou use the primary address when you have multiple IP addresses belonging to the same subnet on the same interface.CIt can be useful for selecting the local address used for packets sent out of unnumbered interfaces when multiple non-127 addresses are configured on the loopback interface.DBy default, the primary address on an interface is selected as the numerically highest local address configured on the interface.
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多选题Which two statements are true about voice packets in a LAN？ （Choose two.） （）AVoice traffic data flow involves large volumes of large packets.BBecause a packet loss involves a small amount of data， voice traffic is less affected by packet losses than traditional data traffic is.CVoice carrier stream utilizes Real-Time Transport Protocol （RTP） to carry the audio/media portion of VoIP communication.DVoice packets are very sensitive to delay and jitter.EVoice packets are encapsulated in TCP segments to allow for proper sequencing during delivery.
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多选题Which two statements are true about MLP interleaving? （）AIt fragments and encapsulates all packets in a fragmentation header.BPackets smaller than the fragmentation size are interleaved between the fragments of the larger packets.CPackets larger than the fragmentation size are always fragmented, and cannot be interleaved, even if the traffic is voice traffic.DIt fragments and encapsulates packets that are longer than a configured size, but does not encapsulate smaller packets inside a fragmentation header.
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