Certification Questions

Q:

At which layer is routing implemented , enabling connections and path selection between two end systems?

Answer

The Network layer provides routing through an internetwork and logical addressing.

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Q:

The DoD model (also called the TCP/IP stack) has four layers. Which layer of the DoD model is equivalent to the Network layer of the OSI model?

A) Application B) Host-to-Host
C) Internet D) Network Access
 
Answer & Explanation Answer: C) Internet

Explanation:

The four layers of the DoD model are Application/process, Host-to-Host, Internet, and Network Access. The Internet layer is equivalent to the Network layer of the OSI model.

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Q:

You want to run the new 802.1w on your switches. which of the following would enable this protocol?

A) Switch (config) # Spanning-tree mode rapid-pvst B) Switch#spanning-tree mode rapid-pvst
C) Switch (config)#spanning-tree mode 802.1w D) Switch#spanning-tree mode 802.1w
 
Answer & Explanation Answer: A) Switch (config) # Spanning-tree mode rapid-pvst

Explanation:

802.1w is the also called Rapid Spanning Tree Protocol. It is not enabled by default on Cisco switches, but it is a better STP to run since it has all the fixes that the Cisco extensions provide with 802.1d

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Q:

As a network administrator you have been requested to move a printer from your company's Marketing OU to your company's Research OU. After the move you test the printer and find that the local administrator assigned to the Marketing OU still has access and can remove print jobs from it. What can you do to change this?

A) Remove the permissions for the local administrator from the printer. B) Remove printer permissions from the local administrator.
C) Remove the Everyone group from the printer. D) Delete the printer object.
 
Answer & Explanation Answer: A) Remove the permissions for the local administrator from the printer.

Explanation:
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Q:

Which layer is responsible for converting data packets from the Data Link layer into electrical signals?

Answer

The physical layer takes frames from the Data Link layer and encodes the 1s and 0s into a digital signal for transmission on the network medium.

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Q:

A user reports a PC problem to the Service Desk. A Service Desk representative determines that the PC is defective and indicates that according to the services catalogue, the PC will be replaced within three hours. Which ITIL process is responsible for having this user's PC replaced within three hours? 

A) Availability Management B) Change Management
C) Configuration Management D) Service Level Management
 
Answer & Explanation Answer: B) Change Management

Explanation:
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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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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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