what-when-how
In Depth Tutorials and Information
communication between two networks through one path between them. When the
links are established in the network, upon the trust ranking, the receiver can eas-
ily filter the messages, which means that the receiver can discard the SPAM from
attackers.
In some cases, the communications between the nodes do not need the assis-
tance of DSL. If two nodes have a strong relationship and they can establish a path
between them directly, the nodes that use the direct link or preestablished link do
not need DSL. In other cases, most of the nodes need to forward the data via the
intermediate nodes. he nodes that want to send data need to execute the route dis-
covery process. he sender and the receiver irst need to exchange the commands.
After that the receiver side will determine whether or not it allows the routing
requirement.
12.2.2 Route Discovery
he first step of the route discovery is the RDM (route discovery message) sending
phrase. In this phrase the sender will send the RDM which contains the name of
receiver and the receiver's keywords. A middle node will check the keywords from
the nodes that it directly connects to it. When the RDM has been delivered to the
destination, the receiver will send an acknowledge message (ACK) to the sender
which contains the path that the sender can use for the data transmission.
12.2.3 DSL Keyword-Based Route
DSL's keyword-based route is very similar to the Google case. For Google, the
user provides some keywords and the Google search engine will execute several
processes to match the webpages to the keywords. A major difference between the
Google and DSL is that all the processes of the webpage searching and keyword
matching are controlled by the administrator's domain. he other diference is
that all the search information can be interpreted by Google; while for DSL,
the content or message can determine whether or not it should announce the
keywords.
12.2.4 Recipient's Controllability
In DSL, the receiver can control the routing path, in order to automatically discard the
bad messages. It is a useful way to defend against the messages from the attackers.
12.2.5 Global Connectivity without Global Identities
Unlike the Internet, which assigns the global identities for each node such as IP
address, DSL does not use the global address. Its RDM includes the path informa-
tion and also does the routing loop detection.
