DeVry NETW 590 All Quizes Latest

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DeVry NETW 590 All Quizes Latest

DeVry NETW 590 Week 1 Quiz Latest

Question 1

5 / 5 pts

(TCO A) A telephone switch _____.

reduces the number of dedicated lines between telephone subscribers

utilizes the concept of multiplexing

is capable of handling hundreds of calls simultaneously

All of the above

Question 2

0 / 5 pts

(TCO A) The PSTN uses a connection hierarchy that _____.

routes calls using a numbering scheme and signaling protocol

uses SS7, an important in-band signaling system

assumes all switches are directly connected to all other switches

is physically switched, rather than protocol-based

Question 3

5 / 5 pts

(TCO B) In the traditional PSTN, voice traffic was _____.

analog, at least for the last mile connection

digitized from the point of termination in the home

analog between trunked switches

switched via packets

Question 4

0 / 5 pts

(TCO B) Address discovery refers to _____.

a reverse phone directory look-up

determining the destination of the call after initiation

recording the sending address after the call is terminated

the national phone number database

Question 5

15 / 15 pts

(TCO A) What are trunks used for in the traditional PSTN?

Question 6

15 / 15 pts

(TCO B) What is the purpose of a VoIP gateway?

DeVry NETW 590 Week 2 Quiz Latest

Question 1

(TCO B) Which of the following is NOT a category of speech coding?

Waveform codecs

Multirate codecs

Hyperthreaded codecs

Source coding

Question 2

(TCO C) The three main components of SIP include _____.

the UA, the SIP Registrar, and the SIP Proxy Server

the gateway, the CLI, and the media decoder

the SDP, the Media Transport Protocol, and the Routing Table

the SIP, the SDP, and the TLA

Question 3

(TCO G) The H.323 standard _____.

assumes QoS is not supported

forms part of the SIP INVITE message

is designed for all forms of media

Both A and C

Question 4

(TCO G) The Media Gateway Control Protocol (MGCP) _____.

unlike the name, does not actually control protocols

includes the MGC and the MG

is a component of the SIP protocol

is an end-to-end protocol

Question 5

(TCO C) What are some of the differences between SIP and H.323?

Question 6

(TCO G) Briefly describe the SDP (Session Description Protocol), and explain what it is used for.

DeVry NETW 590 Week 3 Quiz Latest

Question 1

(TCO D) The two major types of overlay networks include _____.

virtual and physical

secure and public

infrastructure and P2P

private and interstitial

Question 2

(TCO F) Common methods used by the overlay network to maintain a quality voice call include?

Path switching

Packet buffering

Packet replication

All of the above

Question 3

(TCO D) The fact that a service provider does not have an inherent ability to optimize its resources _____.

is a shortcoming of the Internet

is a key reason for the need for the anycast service

leads to the use of a CDN

All of the above

Question 4

(TCO F) Bandwidth loss associated with multiple packet copying and retransmission _____.

may be mitigated by erasure or parity coding

is the primary cost of having an overlay network

requires that the network be overbuilt by 20% or more

None of the above

Question 5

(TCO D) Briefly describe the purpose and rationale behind a CDN.

Question 6

(TCO F) Briefly explain the rationale behind coding, and list some of the primary codes in use.

DeVry NETW 590 Week 4 Quiz Latest

Question 1

(TCO D) The three main types of IEEE 802.11 networks are _____.

the BUS, the Star, and the Mesh

the Hub, the Node, and the Link

Ad Hoc, Infrastructure, and Infrastructure Mesh

None of the above

Question 2

(TCO E) Which is NOT a performance problem typically associated with VoWLAN?

RJ-45 connectivity

Channel access delay

External interference

Disruption in connectivity

Question 3

(TCO E) IEEE 802.11 uses a best-effort approach for scheduling packets. What techniques have been developed to improve VoWLAN performance?

Downlink prioritization

802.11e uplink enhancement

EDCA

All of the above

Question 4

(TCO F) The physical layer of 802.11 protocols uses _____.

spread spectrum

OFDM

MIMO

All of the above

Question 5

15 / 15 pts

(TCO D) Briefly describe the IEEE 802.11 medium access control (MAC).

Question 6

(TCO F) How is wireless capacity defined and what are some of the constraints governing wireless capacity?

DeVry NETW 590 Week 5 Quiz Latest

Question 1

5 / 5 pts

(TCO D) The PSTN phone number and IP address _____.

are associated with each other in a database

are usually stored together in a gateway

may need a dynamic mapping scheme in the case of DHCP

All of the above

Question 2

5 / 5 pts

(TCO D) 911 emergency calls in a wireless network _____.

are located by the radio tracking functionality operated by the service provider

are not allowed

estimate location using the Global Positioning System (GPS)

Both A and C

Question 3

(TCO F) Which of the following is not considered a generic security issue found in VoIP?

Spamming

Malware

Misrepresentation

Denial of service (DOS)

Question 4

(TCO F) The secure, real-time protocol (SRTP) is associated with _____.

signaling message encryption

message integrity

authentication

data encryption

Question 5

(TCO D) Briefly describe the ENUM suite of protocols.

Question 6

(TCO F) Describe the specific VoIP-related security issues.

DeVry NETW 590 Week 6 Quiz Latest

Question 1

5 / 5 pts

(TCO D) The IMS transport layer may include _____.

cellular telephony protocols

WLAN

PSTN

All of the above

Question 2

5 / 5 pts

(TCO E) The application layer of IMS _____.

is known as the “IMS core”

is designed around servers for each application such as voice, video, and messaging

includes control functions for VoIP sessions

None of the above

Question 3

5 / 5 pts

(TCO E) The Service-Based Policy Decision Function _____.

interfaces the RACS with higher layers

provides a single point of contact for the high-level application

performs policy-based decisions for service-level requests

All of the above

Question 4

5 / 5 pts

(TCO F) Some of the advantages to operators afforded by IMS include _____.

providing levels of QoS and charge for it

supporting users inside and outside the operator-specific network

allowing network operators to deliver services to mobile subscribers

All of the above

Question 5

0 / 15 pts

(TCO D) Briefly explain the roles of the Network Attachment Subsystem.

1) Dynamic provisioning of IP addresses

2) User authentication

3) Authorization of network access, based on user profile

4) Access network configuration, based on user profile

5) Location management

Question 6

15 / 15 pts

(TCO F) Briefly describe some of the benefits of IMS to service providers.

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DeVry NETW 590 All Quizes Latest