ICMP: Internet Control Message Protocol used by hosts, routers, gateways to communication network-level information error reporting: unreachable host, network, port, protocol…

Homework 4 Out: Fri 2/27/2015 In: Fri 3/13/2015 * NAT: Network Address Translation 16-bit port-number field: 60,000 simultaneous connections with a single LAN-side address!…

Routing in the Internet The Global Internet consists of Autonomous Systems (AS) interconnected with each other: Stub AS: small corporation Multihomed AS: large corporation…

ICMP: Internet Control Message Protocol used by hosts, routers, gateways to communication network-level information error reporting: unreachable host, network, port, protocol…

IP datagram format ver length 32 bits data (variable length, typically a TCP or UDP segment) 16-bit identifier Internet checksum time to live 32 bit source IP address IP…

Chapter 4 roadmap 4.1 Introduction and Network Service Models 4.2 Routing Principles 4.3 Hierarchical Routing 4.4 The Internet (IP) Protocol 4.4.1 IPv4 addressing 4.4.2 Moving…

Mobile IP Why do we need it? CS 461 Acknowledgement Some figures and texts are from: Solomon Perkins Govindan Kurose Peterson & Davie Huitema Heijenk CS 461 Motivation…

15-441 Computer Networking Lecture 8 – IP Packets, Routers Outline IP Packet Format NAT IPv6 Router Internals Route Lookup IPv4 Header – RFC791 (1981) ver length 32 bits…

NAT: Network Address Translation 10.0.0.1 10.0.0.2 10.0.0.3 10.0.0.4 138.76.29.7 local network (e.g., home network) 10.0.0/24 rest of Internet Datagrams with source or destination…

The Network Layer Chapter 5 The IP Protocol The IPv4 (Internet Protocol) header. IP datagram format IP Addresses IP address formats. IP Addresses (2) Special IP addresses.…