Understanding Network Monitoring
================================

Getting Visibility of Network and Endpoint
------------------------------------------

Network access control is generally established through the following steps.

- Obtain visibility of assets through network discovery and information
  gathering
- Classify the collected assets according to security policy and status
- Establish network access control policies for classified objects

Genian NAC collects information of various network assets through network
sensors and agents and provides real time visibility to network and endpoints
including:

- Network Node
- Endpoint
- IP Address
- Switch / Port
- Wireless LAN

The network sensor and the agent monitor the management target network or the
endpoint in real time and transmit the new information or the changed
information to the policy server.
The administrator can inquire the information of the entire management target
network and the endpoint through the management console provided by the policy
server.

Management Menu
---------------

The management menu on the administrator web console is for searching
information collected through network sensors and agents. Each management
screen is divided into three areas. The Tree Panel and Status & Filter Panel on
the left serve to select the target objects to be displayed on the right View
Pane.

.. image:: /images/console-main.PNG

Tree Panel
^^^^^^^^^^

The Tree Panel allows you to select the target objects to be displayed on the
View Pane as a sensor or as a group that meets the conditions specified by the
administrator.

Status & Filter Panel
^^^^^^^^^^^^^^^^^^^^^

The Status & Filter Panel provides more detailed filtering of selected objects
in the Tree Panel. Based on various information gathered by Genian NAC, it is
easy to select and display objects matching the information in the right view
pane. Also, statistical information is provided through a graph or a table when
the top of various categories provided is selected.

View Pane
^^^^^^^^^

You can perform searches on the objects output through the search function
provided at the top, or perform various tasks through the **Tasks** menu by
selecting each item. Click on the link in the key column for each management
menu to see more detailed information about the object. The key column for each
management menu is as follows.

- Node: **IP**
- IP Address: **Sensor**
- Switch: Switch, **Port**
- WLAN: **MAC**

Troubleshooting
---------------

- :doc:`/troubleshoot/log-collect-method` 
- :doc:`/troubleshoot/diagnosis-method` 
- :doc:`/troubleshoot/cannot-scan`
- :doc:`/troubleshoot/not-match-linkstate`