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Network Management

Chapter 1

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Review Questions:

1. What was the purpose of the OSI reference model?

A. The purpose of OSI is to provide an architecture, which defines communication tasks. The basic premise of OSI is that computer communication for any given task is too complex to be considered as a complete entity. Instead it should be considered as a set of layers each successive layer built on top of a lower layer and using its facilities.

 

2. The OSI Reference Model has seven layers performing seven categories of functions necessary for computer communication. The TCP/IP protocol stack has only four layers. What functionality, if any, is missing in the TCP/IP protocol stack?

A. The additional Presentation and Session layers of the OSI Reference Model provide more functional flexibility and they can be enhanced without disturbing the Application layer software.

 

3. SNMP is part of which layer in the TCP/IP protocol stack.

A. The Application layer

 

4. A Network Management System (NMS) is part of which layer if any in a protocol stack?

A. The Application Layer

 

5. What two elements does a PDC contain?

A. A PDU consists of the data passed by application program and a header.

 

6. What headers would an SNMP packet contain ?

A. SNMP header contains the following:

  • Version number—Specifies the version of SNMP used.
  • Community nameDefines an access environment for a group of NMSs. NMSs       within the community are said to exist within the same administrative domain. Community names serve as a weak form of authentication because devices that do not know the proper community name are precluded from SNMP operations.

 7. What protocol does a web browser use?

A. HTTP

 

8. Why might you want to configure a switch to drop frames intended for a particular device?

A. For more secured network.

 

14. What mapping do switch tables contain?

 A.  Switch table contains destination hardware addresses.

 

15. What mapping do routing tables contain?

 A.  The routing table is a list of mappings of network addresses to ports that will get the packet to the destination network by the best means.