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
the version of SNMP used.
- Community name—Defines 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?
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
Switch table contains destination hardware addresses.
15. What mapping do routing
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.