Module 1.2

Module 1.2

1. Configure Switch Ports

   • Duplex Communication
     • Full-duplex
       • Increases bandwidth efficiency
       • Transmit and receive data simultaneously
         • Requires microsegmentation
     • Half-duplex
       • Is unidirectional
         • Often results in collisions
       • Often seen in Hubs
   • Auto-MDIX
     • Automatic Medium-Dependent Interface crossover
     • Normally connecting sw-to-sw or sw-to-router required different ethernet cables, but it is not necessary with Auto-MDIX
   • Network Access Layer Issues
     • Use the show interfaces command for detecting common media issues.
       • Error Types
         • Input Errors
           • Includes runts, giants, no buffer, CRC, frame, overrun and ignored counts.
         • Runts
           • Ethernet packet that is less than 64 bytes
         • Giants
           • Exceed maximum packet size
             • Greater than 1,518 bytes
         • CRC
           • When the calculated checksum is not the same as the checksum received.
         • Output Errors
           • Sum of all errors
         • Collisions
           • Number of messages retransmitted because of an Ethernet collision
         • Late Collisions
           • A collision that occurs after 512 bits of the frame have been transmitted
   • Interface Input and Output Errors
     • Input errors
       • Sum of all errors in datagrams
         • Runt Frames
           • Frames that are shorter than the 64-byte minimum allowed length
         • Giants
         • Crc Errors