Basic HTML version of Foils prepared 5 February 98

Foil 124 AppleTalk (1)

From Introduction to Networking Technologies CPS640 MultiMedia and Networking -- Spring Semester 1998. by Roman Markowski
AppleTalk is a protocol suite defined by Apple Computers, Inc. for connecting computers and peripherals, and other devices on a network. All Macintosh computers have AppleTalk connectivity options built into them. AppleTalk services include file sharing, print sharing, and electronic-mail handling.
AppleTalk Network Elements
  • Node - addressable device (workstation, printer, router); a node is identified by a unique address that each node selects dynamically at initialization time; the address consists of the node's network number and a unique node number; example: node address 11700.25
  • Network - a cable segment attached to a router; each network is identified by a network number or a range of network numbers; example: network range 11700-11700; there are 2 network-numbering systems:
    • Phase 1 or not-extended 8-bit addressing - allows 254 nodes per network
    • Phase 2 or extended 16-bit addressing - allows for 16,580,608 nodes per network
  • Zone - logical collection of nodes; it can be a collection of nodes on a different networks; each zone is identified by a unique name; example: zone name "NPAC"
  • Internet - the whole network of zones
  • Seed Router - broadcasts information about network numbers and zone names

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