From the course: Networking Foundations: Wide Area Networks (WANs)
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Packet-switched WAN connectivity
From the course: Networking Foundations: Wide Area Networks (WANs)
Packet-switched WAN connectivity
- [Instructor] In this video, let us talk about packet switching, and yes, as the name implies, packet switching involves packets. That means unlike circuit-switch networks where a circuit needs to be built before we can communicate, in packet switching, the traffic is split into chunks called packets, which are then routed over a shared network. Here's an example. Say we'd like to communicate from Site A to Site B. We have traffic with the size of 6,000, just an example. First, we'll have to break it into smaller packets, say we'll then have four packets. The first packet arrives at the switch network. The switch in the network will then do a lookup in its table to find where to route the packets. A circuit will then be established temporarily as it routes the packet from one point to the next. Once the packet is passed, the circuit will then break, ready for a new packet to be routed elsewhere. Pretty cool, eh? Since the circuit that is built is not permanent, it is then referred to…
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