Level 2 Network Diagram

The physical network topology can be directly represented in a network diagram as it is simply the physical graph represented by the diagrams with network nodes as vertices and connections as undirected or direct edges depending on the type of connection.

Level 2 network diagram. Levels in dfd are numbered 0 1 2 or beyond. In the early and mid 1970s networking was largely either government sponsored npl network in the uk arpanet in the us cyclades in france or vendor developed with proprietary standards such as ibm s systems network architecture and digital equipment corporation s decnet public data networks were only just beginning to emerge and these began to use the x 25 standard in the late. After that comes a layer 1 diagram showing physical layouts of the devices. A level 2 diagram could be created for each physical site by expanding the level of detail to all network components and devices including the telecom room demarcation points wiring workstations and pos terminals.

Physical layer 1 osi model layer 1 conveys the bit stream electrical impulse light or radio signal through the network at the electrical and mechanical level. You can edit this network diagram using creately diagramming tool and include in your report presentation website. A physical network diagram shows the actual physical arrangement of the components that make up the network including cables and hardware. Then i make a layer 2 diagram showing the switch connections trunks and lacp channels.

Computer network diagrams are vital for engineers and network administrators. In more complicated networks i also do diagrams showing traffic flows routing protocol distribution mechanisms vpns and other important aspects of the network design. Depending on the complexity of your network this level of diagram may satisfy the assessor needs for requirement 1 1 2. Use the computer network diagram template above by registering for a free lucidchart account.

Layer 2 data link examples include ppp fddi atm ieee 802 5 802 2 ieee 802 3 802 2 hdlc frame relay. Higher level dfds are partitioned into low levels hacking more information and functional elements. The logical network topology can be inferred from the network diagram if details of the network protocols in use are also given. Level 2 shows the data links between adjacent nodes while level 1 shows the purely physical layout.

0 level dfd 1 level dfd and 2 level dfd. Identify any data stores that exist entirely within the level 2 boundary and draw these data stores. Use the level numbering system to number sub processes so that for example process 4 on the level 1 diagram is decomposed to sub processes 4 1 4 2 4 3 on the level 2 diagram. It is also known as context diagram.