Describe permanent virtual circuits PVC-00448
This subjective question is related to the book/course
vu cs301 Data Structures.
It can also be found in
vu cs301 Mid Term Solved Past Paper No. 2.
Question 1: Describe permanent virtual circuits (PVC).
Answer:
ATM can provide customers with virtual circuits that look like traditional leased digital circuits. Such permanent virtual circuits (PVC) last as long as the customer pay the periodic fee for its use. The forwarding tables are automatically restored after power of equipment failure. The forwarding table entries for such permanent VC's are statically configured, the terms used by Telco's for this is provisioning.
Provisioning requires two steps:- To determine a complete path (that is, identify the switches that will be used).
- To choose appropriate VPI/VCI for each step in the path, and configure each adjacent pair of switches (easy, since each switch rewrites the VCI/VPI).
