Connections between devices Devices
A physical topology diagram or network diagram, would show the actual physical devices on a network and how they connect to each other. This is often useful in determining how to expand a network or upgrade one. There are several software packages that do an excellent job of producing the diagram, so it is unlikely this would be done manually. Plus, networks are dynamic enough that you would want some type of automated way of producing the diagram.
Just check this site, all Visio tools & templates that will help to simplify process of topology drawings. http://visiotoolbox.com/downloads/Tools
MAC address, network applications, IP address
network diagram
Is that a spelling error.
It is a hybrid between Use Case and Sequence Diagram
Class diagram
A Venn diagram or a set diagram is a diagram that shows all possible logical relations between a finite collection of sets.
A Venn diagram is a diagram that shows relationships between 2 things or concepts using circles if there are similarities between both then you overlap the circles.
The difference between a graph and a diagram is as follows: a diagram is a chart which shows a drawing and a graph is a graph with lines or bars indicating something specific in numbers.
Electrical symbols are used in electrical wiring diagram, signage on the electrical devices and motors