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PerilSnap

PerilSnap takes a snapshot of the user's Internet neighborhood.

PerilSnap examines the network near the user's IP address, generates a graph (this may take time), and emails an image to the user.

What a Graph Shows

In the example graphs below, the pink node is the user's selected node, the lines are paths on the way to the selected node, and the other boxes are routers along those paths.

Red lines show slow links that may be problems; green lines are for fast links, and yellow and orange are for speeds in between. Links that go red or paths that change a lot at a certain time of day may indicate problems.

PerilSnap sample PerilSnapDeluxe sample

PerilSnap Sample Image

PerilSnapDeluxe Sample Animated Image

Free PerilSnap identifies the user's node automatically. PerilSnapPlus and PerilSnap Deluxe allow the user to select and save a node by IP address or host name.

Details of a Graph

Here is a bigger image showing details of the nodes and edges near the selected node, followed by a description.

PerilSnap sample

Node: a box or shape with lines to other nodes
representing a computer on the Internet: a router, server, or client computer.

Selected node: that produced the graph
Pink with multiple peripheries the node that was selected.

Router: most nodes that are not destinations

Node Color: netblock
in shades of green, cyan, and blue.
Nodes with the same color are in the same netblock. This also usually means they belong to the same ISP; other netblocks may also belong to that ISP.

Node Grey: nonresponding node
Multiple nonresponding hops in a row are bundled into a single grey graph node.
Data collection devices (DCDs) are also shown as grey.

Node Size: branching
The more edges, the bigger the node.

Node Shape: direction of branching
Right-pointed pentagon More edges out than in.
Left-pointed pentagon More edges in than out.
Rectangle No more than one edge in or out.

Node Label: typically an IP address
Edge: a line between two nodes
representing an Internet connection between two computers.

Edge Label: latency and loss
Latency in milliseconds (ms).
Packet loss in percent (%).
2.53 ms, 3%

Edge Color: latency
Greyno latency data
Purple> 250 ms
Red< 250 ms
Caramel< 100 ms
Orange< 10 ms
Yellow< 5 ms
Green< 1 ms
Blue< -5 ms
This can happen when the router at the far end of the hop is faster than the router at the near end, and under other conditions.

Edge Style: packet loss
colored continuous no packet loss.
colored dashed some packet loss;
see the edge label.
grey dashed 100% packet loss.

InternetPerils -- Control Your Internet Business Risk

InternetPerils
3338 Country Club Road #L336
Valdosta, GA 31605
+1 512 563 5647
info (at) internetperils.com
www.internetperils.com