4 Replies Latest reply: Oct 4, 2011 3:19 AM by Uttam RSS

    Understanding the Configuration Register Bits

    Uttam

      Hi

       

      I am reading Todd Lammle for CCNA

       

      I got stuck when I started understanding the configuration register bits

       

      as we know configuration register is 16 bits long, the default configuration on Cisco router is 0x2102 which means bits 13,8 and 1 are onn

      as per the table below each set is of 4 bits is read in binary with a value of 8,4,2,1

       

       

      Config Register #2102
      Bit Number15 14 13 12   11 10 9 8   7 6 5 4   3 2 1 0  
      Binary0    0    1    0   0    0   0 1   0 0 0 0   0 0 1 0 

       

       

       

      My question is, where this 8,4,2,1 came from ?

       

       

       

       

      please help