920-803
Nortel
Technology Standards and Protocol for IP Telephony Solutions
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920-803
QUESTION 1:
A customer named Certkiller .comwants to implementVoIPon their LAN. What isthe role of the gatekeeper in an IP network?
A.It converts media formats between divergent networks.
B.It performs address translation and bandwidth management
C.It connects divergent networksby translating between signaling protocols for call setup and teardown.
D.It supports Internet Telephones with controllersoftware acting as a Private Branch Exchange (PBX) to provide feature capabilities, and call setup through the use of a SIP INVITE to connect a call.
Answer: B
QUESTION 2:
VoIPrequires an IP network to provide the following?
?end-to-endQoS
?lowdelay
?minimaljitter
?echocancellation
?lowpacketloss
Which network devices should be deployed toachieve the "best" voice performance?
A.Layer 2/Layer 3 switches with 802.1q tagging enabled at the core network and managed hubs at the network edge.
B.Requires with filters at the network core and Layer 2 switches with Virtual LANs (VLANs) at the network edge.
C.Layer 2 switches at the core network withDifferentiated Service (DiffServ) enabled and routerstih802.1p Class of Service (CoS) enabled at the network edge.
D.Layer 3 switches at the network core withDiffServ enabled and Layer 2 switches with 802.1p
CoSenabled at the network edge.
Answer: D
QUESTION 3:
In an H.323 network the gatekeeper and the gateway work together to manage the interface between theVoIPnetwork and thePublic SwitchedTelephoneNetwork(PSTN.) Which two functions does the gatekeeper perform?(Choose two.)
A.determines call type B.manages call routing C.handles the dialing plan
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