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…

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…

CSE551: Computer Network Review Network Layers TCP/UDP IP Network Layers Transport Layers TCP/UDP TCP Transport Control Protocol Flow control and Responds to congestion Reliable…