LAN

SIMS-201 LAN Basics, MANs, WANs

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

CSMA/CD ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

CSMA/CD Collision A B C D A B C D A B C D

Types of LANs ,[object Object],[object Object],[object Object],[object Object]

Token Ring Network ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

FDDI (Fiber Distributed Data Interface) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Source:http://burks.brighton.ac.uk/burks/pcinfo/hardware/ethernet/fddi.htm

Ethernet ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The Ethernet Datagram (frame) ,[object Object],[object Object],8 bytes Preamble 6 bytes Destination Address 6 bytes Source Address 2 bytes Length/Type Field 4 bytes Frame Check Sequence 46 to 1500 bytes Data MAC header

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Padding & Overhead ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Ethernet NIC ,[object Object],[object Object],[object Object],[object Object],[object Object]

Metropolitan area network ,[object Object],[object Object],[object Object],[object Object]

Wide area network ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Example of WAN application Sprint Network LA Runs a 100 Mbps LAN DC Runs a 1Gbps LAN Sprint provisions a connection between the two networks

Network Interconnection Components ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The OSI Model ,[object Object],[object Object],[object Object],[object Object]

The OSI Model Physical Layer Data Link Layer Network Layer Transport Layer Session Layer Presentation Layer Application Layer Provides a network interface for applications Translates data to standard format Establishes sessions between computers Provides error control and flow control Supports logical addressing and routing Interfaces with network adapter Converts information into transmitted pulses 1 2 3 4 5 6 7

Repeater ,[object Object],[object Object],[object Object],Physical Repeater Network A Network B Higher Layers Physical Higher Layers Physical

Bridge ,[object Object],[object Object],[object Object],Physical 1 Bridge Data Link 23-01-88-A8-77-45 Physical 2 Data Link Data Link Data Link 53-F1-A4-AB-67-4F Node in Network A Node in Network B Higher Layers Physical Higher Layers Physical

Router ,[object Object],[object Object],Higher Layers Physical Higher Layers Physical Physical 1 Router Data Link Physical 2 Data Link Data Link A node in Network A A node in Network B Data Link Network 145.65.23.102 Network 137.22.144.6 Network Network

Gateway ,[object Object],Gateway 137.22.144.6 145.65.23.102 Netware TCP/IP

LAN

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