CSE 80N Lecture Notes - Lecture 17: Dynamic Host Configuration Protocol, Network Address Translation, Subnetwork
Document Summary
Cmpe 80n-lecture 17 notes-ip addresses and subnets, nat/pat routers, and dhcp. Quiz 6 on wednesday (because friday off) Interface: boundary between host and router and actual physical link. All devices interfaces share the same leftmost bits (network bits) in ip address. Can reach each other without intervening with the router. At home, your isp typically only assigns one address to your account. Nat device: router that allows internet site to connect with multiple computers. 1 ip address for you and your roommates. Can change addresses of devices in local networks without notifying the outside world. Can change isp without changing addresses of devices in local network. Devices inside local net not explicitly addressable or visible by outside world (a security plus) All datagrams leaving local network have same single source nat. 1. host sends datagram to web server. 2. nat router changes datagram source add/port from host"s source ip to web server"s source ip.
