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单选题What ensures that voice packets are given priority throughout the network so that conversations arrive intact?（）A QoSB CentrexC Packet encryptionD Intelligent call routing

题目
单选题
What ensures that voice packets are given priority throughout the network so that conversations arrive intact?（）
A

QoS

B

Centrex

C

Packet encryption

D

Intelligent call routing

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相似问题和答案

第1题：

What does a router do if it has no EIGRP feasible successor route to a destination network and the successor route to that destination network is inactive status?()

A. It routes all traffic that is addresses to the destination network to the interface indicates in the routing table.

B. It sends a copy of its neighbor table to all adjacent routers.

C. It sends a multicast query packet to all adjacent neighbors requesting available routing paths to the destination network.

D. It broadcasts Hello packets to all routers in the network to re-establish neighbor adjacencies.


参考答案：C

第2题：

Why is QoS important in a converged network?（）

  • A、Because voice data packets must follow a single dedicated path through the network
  • B、Because voice data packets should arrive quickly and sequentially, and with no lost data
  • C、Because lost voice-data packets must be retransmitted
  • D、Because data does not need to arrive intact, so data transfer rates can be variable

正确答案:B

第3题：

Router VE1 has just received a packet and needs to route it. What two actions must this router take in order to route incoming packets? (Choose two)

A. Inspect the routing table to select the best path to the destination network addresses.

B. Validate sources of routing information.

C. Inspect the ARP table to verify a legitimate source MAC address for each packet.

D. Identify the destination network address of each packet.

E. Verify the receipt of routed packets by the next hop router.

F. Identify the source network address of each packet.


正确答案：AD
A,D 解析：Explanation:
The router decides how to forward an incoming packet by finding the routes that "match" the destination address of the packet, and then forwarding it according to the most narrowly applicable one.

A packet matches a route in the following way: a packet has (among other things) a destination address in its header, a route contains either a network or a host address, a network mask (netmask), and instructions on how to forward a packet using the route.

The packet matches the route if its destination address is part of the address subspace defined by the network address or exactly matches the host address of the route. A route is more narrowly applicable than another if the address subspace defined by its network address contains fewer actual addresses than the other, which is indicated by the netmask. An entry with a host address, rather than a network address, is the narrowest kind.

第4题：

What are three features of voice traffic on a network？（）

  • A、bursty
  • B、constant
  • C、bandwidth intensive
  • D、small packet sizes
  • E、time-sensitive
  • F、retransmittable

正确答案:B,D,E

第5题：

What ensures that voice packets are given priority throughout the network so that conversations arrive intact?（）

  • A、Centrex
  • B、Packet encryption
  • C、Intelligent call routing
  • D、QoS

正确答案:D

第6题：

Choose the false statement concerning the use of CiscoWorks Internetwork Performance Monitor (IPM) in a Teleworker deployment.（）

  • A、IPM should not be run on a production network. 
  • B、IPM helps verify if a Service Provider is meeting the Service Level Agreement. 
  • C、IPM contains a database that can store data on latency, jitter, and drops of voice packets over a period of weeks or months. 
  • D、The QoS service policy should contain an allocation of sufficient bandwidth in the priority queue (LLQ) for both the SAA probe simulating a voice call and the voice call. If not, voice quality will suffer.

正确答案:A

第7题：

Refer to the exhibit. A router has a 256 kbps Frame Relay circuit connected to interface serial 0/0. As a large FTP packet is being placed into the hardware transmit queue of interface serial 0/0， a voice packet is placed into the priority queue of that interface. How， and in what order， wi the packets be transmitted？（）

  • A、the voice packet will be transmitted first， followed by the FTP packet in its entirety
  • B、the voice packet will be transmitted first， followed by the fragmented FTP packet
  • C、the FTP packet will be fragmented and the voice packet will be interleaved
  • D、the FTP packet will be transmitted first in its entirety， follow by the voice packet

正确答案:D

第8题：

What ensures that voice packets are given priority throughout the network so that conversations arrive intact?()

A.Centrex

B.Packet encryption

C.Intelligent call routing

D.QoS


参考答案：D

第9题：

What is a benefit of Internet protocol (IP) telephony?（）

  • A、Synchronizes password exchanges for call setup
  • B、Eliminates the need for physical cabling in a TCP/IP network
  • C、Enables two-way voice transmission over a packet-switched TCP/IP network
  • D、Creates an encrypted tunnel for voice through a Transmission Control Protocol (TCP)/IP network

正确答案:C

第10题：

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.

正确答案:A,D

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