VC implementation a VC consists of: 1.path from source to destination 2. VC numbers,one number for each link along path 3.entries in forwarding tables in routers along path ▣ packet belonging to VC carries VC number (rather than dest address) VC number can be changed on each link. o New VC number comes from forwarding table Network Layer 4-13 Network Layer 4-13 VC implementation a VC consists of: 1. path from source to destination 2. VC numbers, one number for each link along path 3. entries in forwarding tables in routers along path  packet belonging to VC carries VC number (rather than dest address)  VC number can be changed on each link.  New VC number comes from forwarding table