|Full source and destination address
|A short VC number
|Only source address
|Only destination address
The correct answer is :B
In connection-oriented circuit-switched networks, a concise VC number, commonly referred to as a VCID (virtual circuit identifier), assumes a pivotal role. It serves as a distinguishing factor amidst numerous virtual circuits formed within the broader packet-switched network. Each virtual circuit signifies a designated route for communication, thereby enabling seamless data transmission between network endpoints. Through the allocation of a distinct VCID to each virtual circuit, the network adeptly monitors and guarantees the precise delivery of data to its intended destination.