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hi to all ...i need help for ma assignment...plx the question n send to me ...i will very thank full for u people
at least giver me a answer in 10 or 11 lines if possible wid example plz send it to me as soon as possible

Q: expain why the Domain name server (DnS) arose as the best solution to name resolution on  a network?


Q: wat is the criteria of ring network, a tree network , star network?


if possible send it all the asnwer on ma email  [email protected]

byee seee ya

Maybe you should do your own homework.

"Q: expain why the Domain name server (DnS) arose as the best solution to name resolution on  a network?"

Prior to DNS, associating a human-readable string to an IP address was accomplished by requiring the string be passed through a hashing function to obtain a numeric value to be used for the IP address.  While this works assuming you can use any IP address you want, if you need a particular IP address, finding a string to hashes to that particular address is a computationally expensive task.  It became popular to use a central server that can be queried to find a pre-computed and cached answer, and this naturally evolved into modern DNS.

"Q: wat is the criteria of ring network, a tree network , star network?"

A ring network is organized by having for "corner" servers directly connected to one another, forming a structure that looks on paper like a boxing ring.  Messages pass "on the ropes" using a higher bandwidth, allowing data to be efficiently routed between subnets connected to the corner machines.

A tree network is a network with many nodes connected by a single trunk that runs through it like the wire connecting lights on a Christmas tree.  Often this line uses coaxial cable and BNC connectors.  It suffers the same problem many Christmas trees suffer where if one node (light) goes down, the entire network stops working (all the Christmas lights go off).  It's also not considered politically correct in multicultural computing environments.

A star network is laid out in a circle along which messages are passed, much like planets moving along the ecliptic in the sky.  Traditionally, these networks are divided into twelve subregions or "arcs" of varying characteristics.  Network performance can be effeciently analyzed by noting where packets are located as they move through the arcs of the ecliptic.  Ideal configurations keep network bandwidth managed by trying to organize packets into conjunctions, trines, or sextiles (together, at 120 degree increments, or at 60 degree increments, respectively).  Data doesn't tend to flow as well when packet reach opposition or quartiles (180 or 90 degree configurations).  Other geometries are possible, but research is dividing as to their impact.

Good look on your assignment!