Source Address Comparison

Linear search algorithm
Advantage
Easy to understand the logic
Easy to maintain the code
Disadvantage
May cause low performance if the number of source addresses is highly increased
           → It is quite rare that so many multicast applications
              use a same multicast address for each different
              channel.
                 e.g., (S1,G1), (S2,G1), (S3,G1), ... (S1000,G1), ...