CSE 80N Lecture Notes - Lecture 15: Bitwise Operation, Classless Inter-Domain Routing, Best-Effort Delivery
Document Summary
Forwarding: move packets from router"s input to appropriate router output interface. Routing: determine route packet takes from source to destination. Routers: no state about end to end connection. Because tcp is higher-level and it can handle the reliable delivery. Cmpe 80n-lecture 15 notes-network layer, ip addresses, masks and subnets. Defines ip addressing scheme to label source and destination. Delivers packets from source to destination based on ip address. Address is fully qualified when we state the ip address and mask. End up having wasted address because of the rigid boundaries. Address format: a. b. c. d/x where x is the mask or number of bits in subnet portion. To determine the network the host is on. For network ids, it will always be continuous 1s. 32 bit ip address 4 billion addresses. Don"t want one network to handle all the ips so subnets are used. Ip address: unique 32 bit identifier for host or router. Interface: boundary between host/router and physical link.
