Technical incidents in a local network

We must differentiate the network incidents, which are all that we study in the course, from the network-level incidents, which are those derived from layer 3 of the OSI stack, and specifically, the problems related to the protocol Internet addressing ; IP Internet Protocol since it is the protocol that it uses, together with the transport layer, to identify the destination post in the global Internet network.

The most common faults at the network level are, therefore, a consequence of the routing or routing of IP addresses, and those of application, usually derive from access control, or reallocation of local addresses, so the ACL ( Access Control List) protocols ) and NAT (Network Address Translation ) are of special importance.

The IP addressing errors can be generic, common to all protocols, or specific to a particular addressing protocol, which will require the understanding of said protocol for the solution of the problem.

 Another of the most frequent approaches is the use of a laptop in different environments, for example connected to a corporate network during work and then, at home, connected to the home network. The problem may arise if a fixed local address is used at work, which is the most common, and at home the automatic configuration by DHCP, to allow the stalls and smartphones of our guests to connect .

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