Top-down
•
Application, Presentation & Session
-User can access various web
pages on the internet.
HOW IT OPERATES
-Always start at the application
layer and works its way down until
It find faulty layer.
ADVANTAGES/DISADVANTAGES
-if the problem turn out to be
related to lower layers,
You have wasted a lot of time and
effort at the upper or application layers
Bottom-Up
• Physical
• Concerned
with hardware and wire connections
HOW IT OPERATES
-always start a physical layer and work it way up
until it find a faulty layer .
ADVANTAGES/DISADVANTAGES
Its is slow but solid approach. When the problem
application (or upper layer) related this approach can take a long time.
Divide-and-conquer
•
Transport, Network, Data Link
• Example:
Troubleshooter may begin at the network
layer, by
verifying IP configuration information
HOW IT OPERATES
-based on circumstanced( reported issues) and your
experience you might decide to start at any layer and work up or down the OSI
stack
ADVANTAGES/DISADVANTAGES
It approaches the layer of the culprit faster than the
other approaches. You need experience to use this approach effectively
Trial and Error
• Trial and
error relies on individual knowledge to
determine
the most probable cause of a problem.
• Solution
based on past experience and knowledge
of the
network structure.
Substitution
•
Substitution technique the problem is assumed to be
caused by a
specific hardware component or a
configuration
file.
• The
defective part or code is replaced by a known
No comments:
Post a Comment