20 - Network Applications Example applications Symbolic...

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Network Applications Example applications Symbolic names and the Domain Name System (DNS)
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Network applications End-user applications Email, file transfer, World Wide Web, remote login, audio and video conferencing, directory services, networked games, MUDs Supporting services Domain name system, authentication, billing, encryption, time etc.
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Symbolic names for computers users can give symbolic text names for computers instead of numeric IP addresses symbolic name is sequence of alphanumeric stings separated by full-stops structured as a hierarchical, list of domains with the most significant part on the right marian.cs.nott.ac.uk foo.bar.com number of domains is not fixed
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DNS Design: Hierarchy Definitions root edu net org uk com gwu ucb cmu bu mit cs ece cmcl Each node in hierarchy stores a list of names that end with same suffix Suffix = path up tree E.g., given this tree, where would following be stored: Fred.com Fred.edu Fred.cmu.edu Fred.cmcl.cs.cmu.edu Fred.cs.mit.edu
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Management of domain names Each organisation registers under a top
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This note was uploaded on 08/14/2011 for the course ELECTRONIC G52CCN taught by Professor Professorgail during the Spring '09 term at Uni. Nottingham.

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20 - Network Applications Example applications Symbolic...

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