An engineer configures NTP authentication on a router. What is the purpose of NTP authentication?

To encrypt NTP packets between client and server

To allow the router to act as an NTP server

To compress NTP packets for faster transmission

To ensure the router only accepts time updates from trusted NTP servers

A network engineer is configuring multicast for a video streaming service. The engineer wants to allow receivers to request traffic from a specific source only, to prevent unwanted sources from sending to the group. Which IGMP version and feature should be used?

IGMPv2 with the IGMP snooping feature.

IGMPv3 with source-specific membership reports.

What is the purpose of a PIM Sparse Mode join message?

To request multicast traffic for a specific group

Which command displays the current NAT translations on a Cisco router?

show running-config | include nat

CiscoCertified Network Professional Enterprise

Domain 3Objective 3

3.3 IP Services 350-401 Practice Questions (Page 4)

Part of the 3.0 Infrastructure domain, which accounts for 30% of the 350-401 exam. Cisco does not publish an official question count, but from its 120-minute exam (~50–80 total, ~15–24 in this domain), expect 5–8 from this objective — we provide 40 practice questions to prepare you well beyond it. (estimate)

40questions here

8free pages

13concepts

30%of the exam

Questions 16–20

16foundation · easy
An engineer configures NTP authentication on a router. What is the purpose of NTP authentication?
Select an answer first
17application · medium
A video streaming service wants to use Source-Specific Multicast (SSM) to deliver content to subscribers. The network uses IGMPv3 on the access layer. Which multicast group range should be used for SSM?
Select an answer first
18application · medium
A network engineer is configuring multicast for a video streaming service. The engineer wants to allow receivers to request traffic from a specific source only, to prevent unwanted sources from sending to the group. Which IGMP version and feature should be used?
Select an answer first
19foundation · easy
What is the purpose of a PIM Sparse Mode join message?
Select an answer first
20foundation · easy
Which command displays the current NAT translations on a Cisco router?
Select an answer first

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