BASIC INTERNET SERVICES AND SPECIFIC NETWORK CONTEXTS 793
For example, [Mai02], [BB07], and [FHN
+
07] propose a visualization of email exchanges
between users. The first one is an orthogonal drawing showing the relationships among
Internet domains that generate spam. The second one proposes to visualize email exchanges
as an example of application of a layout algorithm of graphs with different levels of detail.
The last one is a paper describing the visualization of mail exchange patterns with different
drawing methodologies. Other contributions focus on monitoring the usage of distributed
services like the Domain Name System (DNS). For example, the approach in [DSN12] allows
to observe how the workload shifts between different name servers, thus showing ...