Certification Questions

Q:

Acknowledgments, sequencing , and flow control are characteristics  of which OSI layer?

A) Layer 2 B) Layer 3
C) Layer 4 D) Lawer 7
 
Answer & Explanation Answer: C) Layer 4

Explanation:

A reliable Transport layer connection uses acknowledgments to make sure all data is transmitted and received reliably. A reliable connection is defined by a virtual circuit that uses acknowledgments, sequencing, and flow control, which are characteristics of the transport layer.

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Q:

You have a computer that runs Windows 7.
You need to confirm that all device drivers installed on the computer are digitally signed. What should you do?

A) At a command prompt, run Verify. B) At a command prompt, run Sigverif.exe.
C) From Device Manager, click Scan for hardware changes. D) From Device Manager, select the Devices by connection view.
 
Answer & Explanation Answer: B) At a command prompt, run Sigverif.exe.

Explanation:
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28 11305
Q:

The SQL keyword(s) ________ is used with wildcards.

A) LIKE only B) IN only
C) NOT IN only D) IN and NOT IN
 
Answer & Explanation Answer: A) LIKE only

Explanation:
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35 11265
Q:

How should a router that is being used in a Frame Relay  network be configured to keep split horizon issues from preventing routing updates

A) Configure a seperate subinterface for each PVC with a unique DLCI and subnet assigned to the subinterface B) Combine multiple Frame Relay circuits as a point-to-point line to support multicast and broadcast traffic
C) Configure many subinterfaces in the same subnet D) Configure a single subinterface to establish multiple PVC connections to multiple remote router interfaces.
 
Answer & Explanation Answer: A) Configure a seperate subinterface for each PVC with a unique DLCI and subnet assigned to the subinterface

Explanation:

If you have a serial port configured with multiple DLCIs connected to multiple remote sites, split horizon rules stop route updates received on an interface from being sent out the same interface. By creating subinterfaces for each PVC, you can avoid the split horizon issues when using Frame Relay.

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Q:

Which of the following describes the creation of private networks across the Internet, enabling privacy and tunneling of non-TCP/IP protocols?

A) HDLC B) Cable
C) VPN D) IPSec
 
Answer & Explanation Answer: C) VPN

Explanation:

A VPN allows or describes the creation of private networks across the Internet, enabling privacy and tunneling of non-TCP/IP protocols. A VPN can be set up across any type of link.

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22 11035
Q:

 The main objective of Availability Management is?

A) To monitor and report availability of services and components B) To guarantee availability levels for services and components
C) To ensure that all targets in Service Level Agreements (SLAs) are met D) To ensure that service availability matches or exceeds the agreed needs of the business
 
Answer & Explanation Answer: D) To ensure that service availability matches or exceeds the agreed needs of the business

Explanation:
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2 10917
Q:

Which OSI layer defines the standards for cabling and connectors?

A) Layer 1 B) Layer 4
C) Layer 7 D) Layer 3
 
Answer & Explanation Answer: A) Layer 1

Explanation:

OSI layer 1 defines the standards for cabling and connectors.

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Job Role: Network Engineer

31 10793
Q:

The spell check module of a word-processing software package contains a number of errors. The Development department has corrected these errors in a new version. Which process is responsible for ensuring this updated version is tested?

A) Configuration Management B) Incident Management
C) Problem Management D) Release Management
 
Answer & Explanation Answer: D) Release Management

Explanation:
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