Transport vs.network layer *network layer: logical household analogy片 communication 12 kids in Ann's house between hosts sending letters to 12 kids in Bill's house: transport layer: hosts houses logical processes kids communication app messages letters between in envelopes processes transport protocol Ann and Bill who demux to in- ■relies on, house siblings enhances, network-layer protocol network layer postal service services Transport Layer 3-5 Transport Layer 3-5 Transport vs. network layer  network layer: logical communication between hosts  transport layer: logical communication between processes  relies on, enhances, network layer services 12 kids in Ann’s house sending letters to 12 kids in Bill’s house:  hosts = houses  processes = kids  app messages = letters in envelopes  transport protocol = Ann and Bill who demux to in￾house siblings  network-layer protocol = postal service household analogy: