Intro to Networking with Lab

VoiceVOIP

NETW | 202 | Intro to Networking with Lab | assessment | WEEK 2 QUIZ #1 NETW202

Question 1 2 / 2 pts (CO 10) Putting voice trafﬁc on a packet LAN or WAN requires assessing and curbing excessive _____ experienced by voice packets when they share the network with data.   loss   latency   delay jitter Correct!   All of the above Chapter 7   Question 2 2 / 2 pts (CO 10) Granting all traffic the highest priority on a packet LAN or WAN means that _____.   there is only best-effort service for all traffic types   there is no prioritization at all   no traffic type has an advantage over the others Correct!   All of the above Chapter 7   Question 3 2 / 2 pts (CO 12) _____ is typically the action of sending an INVITE message to every phone number on a network in search of vulnerable devices based on received responses.   Eavesdropping   Vishing   High-volume calling Correct!   SIP scanning Chapter 7   Question 4 2 / 2 pts (CO 12) An IP phone typically contains a LAN switch port for connecting to the network and an extra port for connecting a PC. From the _____ perspective, the PC should not be able to reach call servers, gateways, or other VoIP components.   troubleshooting   bandwidth utilization   network performance Correct!   security Chapter 7   Question 5 2 / 2 pts (CO 12) From a security viewpoint, a(n) _____ typically opens single-port “pinholes” to allow different VoIP control signaling and active call connections to pass through.   call server   IP phone Correct!   firewall   PBX  Chapter 7   Question 6 0 / 2 pts (CO 11) Which of the following is a best practice when deploying a VoIP system? You Answered   Baselining the existing IP network   Collecting baseline data before issuing the RFP for the project   Conducting a pre-assessment of the data network Correct Answer   All of the above Chapter 9   Question 7 2 / 2 pts (CO 11) When monitoring the audio quality of VoIP services, key network metrics regarding packet ﬂows are _____, jitter, and packet loss. Correct!   latency   call setup time   uptime   response time Chapter 9   Question 8 2 / 2 pts (CO 11) Which of the following is correct about echo in a voice call?   It could be caused by gateways between VoIP and analog lines.   It could be caused by acoustic feedback from a phone or headset.   It is not visible in voice packets. Correct!   All of the above Chapter 9   Question 9 2 / 2 pts (CO 11) After-dial delay is typically a _____ problem.   registration   connectivity   sound quality Correct!   user experience Chapter 9  

NETW | 250 | VoiceVOIP | assessment | Question 1 2 / 2 pts (CO 10) P

WEEK 6: QUIZ Attempt History Attempt Time Score LATEST Attempt 1 18 minutes 20 out of 20 Score for this quiz:  20  out of 20 This attempt took 18 minutes.   Question 1 2 / 2 pts (CO 10) Putting voice trafﬁc on a packet LAN or WAN requires assessing and curbing excessive _____ experienced by voice packets when they share the network with data.   loss   latency   delay jitter Correct!   All of the above Chapter 7   Question 2 2 / 2 pts (CO 10) Granting all packets the top priority status on a packet LAN or WAN means that _____. Correct!   no packet has an advantage over any other packet   all packets arrive at their destination sooner than they typically do   every packet is processed with the highest priority by network devices   All of the above Chapter 7   Question 3 2 / 2 pts (CO 12) _____ is typically the action of spoofing a caller ID to convince a target that a legitimate party is requesting information by phone.   Eavesdropping Correct!   Vishing   High-volume calling   SIP scanning Chapter 7   Question 4 2 / 2 pts (CO 12) When ﬁrst connecting to a network, an IP phone may require _____ from a proxy server or a registrar server before it can send packets to anywhere other than the server. Correct!   authentication   encryption   authorization   password Chapter 7   Question 5 2 / 2 pts (CO 12) From a security viewpoint, a ﬁrewall typically opens _____ to allow different VoIP control signaling and active call connections to pass through. Correct!   single-port “pinholes”   the full range of UDP ports   the full range of TCP ports   all ports Chapter 7   Question 6 2 / 2 pts (CO 11) Which of the following is a best practice when deploying a VoIP system?   Baselining the existing IP network   Collecting baseline data before issuing the RFP for the project   Conducting a pre-assessment of the data network Correct!   All of the above Chapter 9   Question 7 2 / 2 pts (CO 11) To achieve a good user experience on VoIP services, connectivity is a(n) _____.   guarantee Correct!   prerequisite   irrelevant factor   None of the above Chapter 9   Question 8 2 / 2 pts (CO 11) Which of the following is correct about troubleshooting echo?   The built-in echo canceling of speaker phones and those designed for audio conferencing could fail.   The echo canceler feature of a gateway between VoIP and analog lines could be turned off.   Although not visible in packets, echo can be heard when playing back audio streams. Correct!   All of the above Chapter 9   Question 9 2 / 2 pts (CO 11) Response time, for example, to enter a video conference, is typically a _____ problem.   registration You Answered   connectivity   sound quality   user experience Chapter 9   Question 10 2 / 2 pts (CO 10) What action of service providers could potentially impact VoIP QoS of an enterprise?   Routing path changes

NETW | 250 | VoiceVOIP | assessment | WEEK 6: QUIZ Attempt History A

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