GIAC GSNA Exam - Topic 2 Question 94 Discussion

Many organizations create network maps of their network system. These maps can be made manually using simple tools such as Microsoft

Visio, or the mapping process can be simplified by using tools that integrate auto network discovery with Network mapping. Many of the

Customize the maps

Include one's own labels

Add un-discoverable items

Add background images

Sophisticated mapping is used to help visualize the network and understand relationships between end devices and the transport layers that

provide service. Items such as bottlenecks and root cause analysis can be easier to spot using these tools.

There are three main techniques used for network mapping: SNMP-based approaches, Active Probing, and Route analytics.

The SNMP-based approach retrieves data from Router and Switch MIBs in order to build the network map. The Active Probing approach relies

on a series of trace route like probe packets in order to build the network map. The Route analytics approach relies on information from the

routing protocols to build the network map. Each of the three approaches has advantages and disadvantages in the methods that they use.

Answer D is incorrect. Packet crafting is a technique that allows probing firewall rule-sets and finding

entry points into the targeted

system or network. This can be done with a packet generator. A packet generator is a type of software that generates random packets or

allows the user to construct detailed custom packets. Packet generators utilize raw sockets.

This is useful for testing implementations of IP stacks for bugs and security vulnerabilities.