Network service model Q:What service model for "channel"transporting datagrams from sender to receiver? Example services for Example services for a individual datagrams: flow of datagrams: ▣guaranteed delivery in-order datagram ▣guaranteed delivery delivery with less than 40 msec ▣guaranteed minimum delay bandwidth to flow ▣restrictions on changes in inter- packet spacing Network Layer 4-8Network Layer 4-8 Network service model Q: What service model for “channel” transporting datagrams from sender to receiver? Example services for individual datagrams:  guaranteed delivery  guaranteed delivery with less than 40 msec delay Example services for a flow of datagrams:  in-order datagram delivery  guaranteed minimum bandwidth to flow  restrictions on changes in inter￾packet spacing