Topology of the Internet. Autonomous Systems (AS) Two-Level Routing. Why are there different Protocols?
|
|
- Evangeline Ward
- 6 years ago
- Views:
Transcription
1 Topology of the Internet Autonomous Systems (AS) The global Internet consists of Autonomous Systems (AS) interconnected with each other: - Collection of routers under same administrative control, all running the same routing protocol among themselves. - Stub AS: only one connection to another AS (small company) - Mulithomed AS: multiple connections to other AS. No transit. (large corporation) - Transit AS: hooking many AS together (provider) Two-Level Routing Intra-AS Routing (RIP/DV, OSPF/LS, IGRP/DV) - administrator responsible for the choice of routing protocol. Inter-AS Routing (BGP) Why are there different Protocols? Policy: - Inter-AS: control over how traffic is routed, and who routes through the network. - Intra-AS: single admin, so no policy decisions needed. Scale: - hierarchical routing saves table size, reduced update traffic. Performance: - Intra-AS: can focus on performance - Inter-AS: scalability and policy dominate over performance.
2 IPv4 Addressing An IP address is an identifier for a host/router interface. - Interface: connection between host/router and physical link - Routers have several interfaces, hosts can have several interfaces. IPv4 Address Structure IPv4 Addresses: 32 bit Human readable form: a.b.c.d example: network/prefix x bits (where a,b,c,d are 8bit values) host 32-x bits Interface Addresses and Subnets A Router (layer 3) connects layer 2 networks. These networks are also called Subnet and have their own network id. Routing is only based on the network identifier. - prefix = x MSB of the address (x: mask) - we use the following notation for the prefix: a.b.c.d/x - in Windows the mask has the form of e.g., (=/24)
3 Routing Table Example Forwarding Policy Routing Table at router R2 (simplified) subnet next hop L2 if / /24 -* / / /24 -* /24 -* 3 prefix 3 2 check if destination address matches the prefix of the incoming network interface: - if it does: pass packet to transport layer (node is destination) - else drop packet (the destination is on same network, no forwarding required) else, choose longest matching prefix in routing table. forward packet based on next hop information. 1 * this subnet is directly connected to the router. Default Router Address Resolution Protocol (ARP) Entry in the routing table of a host or router, specifying to which router a message that does not match any prefix should be forwarded to. Usually a gateway to other networks, e.g., the Internet. Translation between network-layer addresses and linklayer addresses > 49-BD-D2-C7-56-2A Resolution on same local link only (not-end-to end): who has , tell reply is at 49-BD-D2-C7-56-2A Resolution at every router! Cache to avoid ARP request for every single packet (expires after ca. 20 minutes)
4 Configuration on a Host network/prefix size: x bits host Hierarchy - a Key to Scalability Hierarchical Naming - domain names: uu.se, it.uu.se - fully qualified domain names: rama.it.uu.se, - Domain Name System Address: network/prefix, host > identifyer Network mask > recognise prefix (network) Default router > router for traffic not on same netw. DNS server Hierarchical Addressing - use of prefixes: /20, /23 - IPv4 Addresses Hierarchical Routing - tightly related to addressing - Autonomous Systems (intra-as and inter-as routing) Hierarchical Addresses Example without guarantee Network Address Allocation sunet.se /11 242: uu.se /16 238: it.uu.se /24 student.uu.se /24
5 Network Address Allocation More Addresses... Allocation of prefixes is necessary for routing efficiency but inefficient in terms of address usage. IPv6 - Extended addressing capabilities (net id, id unique) - Streamlined header (40 Bytes) - Flow labelling and priority Network Address Translation (NAT) - IP addresses have only a local scope /8, /16 ( non routable addresses) - Typical home/student network. How does an IPS get a block of addresses? ICANN: Internet Corporation for Assigned Names and Numbers Note: It is not the goal to improve address usage efficiency. Alternative Routing Approaches Label Switching - Hop-by-hop addresses (labels) - Example: Multiprotocol Label Switching (MPLS) Probabilistic Routing - The routing table indicates the probability to deliver to the destination based on prior experience. - Forward a message if higher probability than previous hop. - Example: Prophet routing protocol (Sami Network Connectivity) Content Routing - Finding information rather than a specific address.
Network layer: Overview. Network layer functions IP Routing and forwarding NAT ARP IPv6 Routing
Network layer: Overview Network layer functions IP Routing and forwarding NAT ARP IPv6 Routing 1 Network Layer Functions Transport packet from sending to receiving hosts Network layer protocols in every
More informationNetwork layer: Overview. Network Layer Functions
Network layer: Overview Network layer functions IP Routing and forwarding NAT ARP IPv6 Routing 1 Network Layer Functions Transport packet from sending to receiving hosts Network layer protocols in every
More informationHomework 3 Discussion
Homework 3 Discussion Address Resolution Protocol (ARP) Data Link Layer Network Layer Data Link Layer Network Layer Protocol Data Unit(PDU) Frames Packets Typical Device Switch/Bridge Router Range Local
More informationReview for Chapter 4 R1,R2,R3,R7,R10,R11,R16,R17,R19,R22,R24, R26,R30 P1,P2,P4,P7,P10,P11,P12,P14,P15,P16,P17,P22,P24,P29,P30
Review for Chapter 4 R1,R2,R3,R7,R10,R11,R16,R17,R19,R22,R24, R26,R30 P1,P2,P4,P7,P10,P11,P12,P14,P15,P16,P17,P22,P24,P29,P30 R1. Let s review some of the terminology used in this textbook. Recall that
More informationInternetworking Part 2
CMPE 344 Computer Networks Spring 2012 Internetworking Part 2 Reading: Peterson and Davie, 3.2, 4.1 19/04/2012 1 Aim and Problems Aim: Build networks connecting millions of users around the globe spanning
More informationLecture 4 The Network Layer. Antonio Cianfrani DIET Department Networking Group netlab.uniroma1.it
Lecture 4 The Network Layer Antonio Cianfrani DIET Department Networking Group netlab.uniroma1.it Network layer functions Transport packet from sending to receiving hosts Network layer protocols in every
More informationNetwork Layer PREPARED BY AHMED ABDEL-RAOUF
Network Layer PREPARED BY AHMED ABDEL-RAOUF Network layer transport segment from sending to receiving host on sending side encapsulates segments into datagrams on receiving side, delivers segments to transport
More informationThe Interconnection Structure of. The Internet. EECC694 - Shaaban
The Internet Evolved from the ARPANET (the Advanced Research Projects Agency Network), a project funded by The U.S. Department of Defense (DOD) in 1969. ARPANET's purpose was to provide the U.S. Defense
More informationCPSC 826 Internetworking. The Network Layer: Routing & Addressing Outline. The Network Layer
1 CPSC 826 Intering The Network Layer: Routing & Addressing Outline The Network Layer Michele Weigle Department of Computer Science Clemson University mweigle@cs.clemson.edu November 10, 2004 Network layer
More informationInternetworking Part 2
CMPE 344 Computer Networks Spring 2012 Internetworking Part 2 Reading: Peterson and Davie, 3.2, 4.1 16/08/2018 1 Aim and Problems Aim: Build networks connecting millions of users around the globe spanning
More informationLecture 3: Packet Forwarding
Lecture 3: Packet Forwarding CSE 222A: Computer Communication Networks Alex C. Snoeren Thanks: Mike Freedman & Amin Vahdat Lecture 3 Overview Paper reviews Packet Forwarding IP Addressing Subnetting/CIDR
More informationLast time. Network layer. Introduction. Virtual circuit vs. datagram details. IP: the Internet Protocol. forwarding vs. routing
Last time Network layer Introduction forwarding vs. routing Virtual circuit vs. datagram details connection setup, teardown VC# switching forwarding tables, longest prefix matching IP: the Internet Protocol
More informationCSC 4900 Computer Networks: Network Layer
CSC 4900 Computer Networks: Network Layer Professor Henry Carter Fall 2017 Chapter 4: Network Layer 4. 1 Introduction 4.2 What s inside a router 4.3 IP: Internet Protocol Datagram format 4.4 Generalized
More informationChapter 3 Internetworking
Chapter 3 Internetworking Basic Internetworking (IP) (cont d) Datagram forwarding in IP Every datagram contains the IP address of the destination host If directly connected to destination network, then
More informationMcGraw-Hill The McGraw-Hill Companies, Inc., 2000
!! McGraw-Hill The McGraw-Hill Companies, Inc., 2000 "#$% & '$# )1 ) ) )6 ) )* )- ). )0 )1! )11 )1 )1 )16 )1 3'' 4", ( ( $ ( $ $$+, $$, /+ & 23,4 )/+ &4 $ 53" Network Layer Position of network layer Figure
More informationCS4450. Computer Networks: Architecture and Protocols. Lecture 20 Pu+ng ALL the Pieces Together. Spring 2018 Rachit Agarwal
CS4450 Computer Networks: Architecture and Protocols Lecture 20 Pu+ng ALL the Pieces Together Spring 2018 Rachit Agarwal What is a computer network? A set of network elements connected together, that implement
More informationHY 335 Φροντιστήριο 8 ο
HY 335 Φροντιστήριο 8 ο Χειμερινό Εξάμηνο 2009-2010 Παπακωνσταντίνου Άρτεμις artpap@csd.uoc.gr 4/12/2009 Roadmap IP: The Internet Protocol IPv4 Addressing Datagram Format Transporting a datagram from source
More informationCMPE 150/L : Introduction to Computer Networks. Chen Qian Computer Engineering UCSC Baskin Engineering Lecture 12
CMPE 150/L : Introduction to Computer Networks Chen Qian Computer Engineering UCSC Baskin Engineering Lecture 12 1 Chapter 4: outline 4.1 introduction 4.2 virtual circuit and datagram networks 4.3 what
More informationInternet Protocol Addressing and Routing. Redes TCP/IP
Internet Protocol Addressing and Routing Redes TCP/IP Internet Topology Internet - WAN Gateway or router Physical Network (LAN) internet LAN LAN LAN Dotted Decimal Notation 2 7 2 6 2 5 2 4 2 3 2 2 2 1
More informationTutorial 9. SOLUTION Since the number of supported interfaces is different for each subnet, this is a Variable- Length Subnet Masking (VLSM) problem.
Tutorial 9 1 Router Architecture Consider a router with a switch fabric, 2 input ports (A and B) and 2 output ports (C and D). Suppose the switch fabric operates at 1.5 times the line speed. a. If, for
More informationMaster Course Computer Networks IN2097
Chair for Network Architectures and Services Prof. Carle Department for Computer Science TU München Master Course Computer Networks IN2097 Prof. Dr.-Ing. Georg Carle Christian Grothoff, Ph.D. Chair for
More informationBasic Idea. Routing. Example. Routing by the Network
Basic Idea Routing Routing table at each router/gateway When IP packet comes, destination address checked with routing table to find next hop address Questions: Route by host or by network? Routing table:
More informationInitial motivation: 32-bit address space soon to be completely allocated. Additional motivation:
IPv6 Initial motivation: 32-bit address space soon to be completely allocated. Additional motivation: header format helps speed processing/forwarding header changes to facilitate QoS IPv6 datagram format:
More informationEC441 Fall 2018 Introduction to Computer Networking Chapter4: Network Layer Data Plane
EC441 Fall 2018 Introduction to Computer Networking Chapter4: Network Layer Data Plane This presentation is adapted from slides produced by Jim Kurose and Keith Ross for their book, Computer Networking:
More informationAddressing and Routing
Addressing and Routing Andrew Scott a.scott@lancaster.ac.uk Physical/ Hardware Addresses Aka MAC* or link(-layer) address Can only talk to things on same link Unique ID given to every network interface
More informationLecture 8. Network Layer (cont d) Network Layer 1-1
Lecture 8 Network Layer (cont d) Network Layer 1-1 Agenda The Network Layer (cont d) What is inside a router Internet Protocol (IP) IPv4 fragmentation and addressing IP Address Classes and Subnets Network
More informationRouting by the Network
Routing Basic Idea Routing table at each router/gateway When IP packet comes, destination address checked with routing table to find next hop address Questions: Route by host or by network? Routing table:
More informationOutline. Addressing on the network layer ICMP IPv6 Addressing on the link layer Virtual circuits
Lecture 2 Outline Addressing on the network layer ICMP IPv6 Addressing on the link layer Virtual circuits TCP/IP protocol suite Good name for our book! User application, e.g., http with Mozilla Communication
More informationCOMPUTER NETWORK. Homework #3. Due Date: May 22, 2017 in class
Computer Network Homework#3 COMPUTER NETWORK Homework #3 Due Date: May 22, 2017 in class Question 1 Host A and B are communicating over a TCP connection, and Host B has already received from A all bytes
More informationComputer Network Fundamentals Spring Week 4 Network Layer Andreas Terzis
Computer Network Fundamentals Spring 2008 Week 4 Network Layer Andreas Terzis Outline Internet Protocol Service Model Addressing Original addressing scheme Subnetting CIDR Fragmentation ICMP Address Shortage
More informationCS 457 Networking and the Internet. The Global Internet (Then) The Global Internet (And Now) 10/4/16. Fall 2016
CS 457 Networking and the Internet Fall 2016 The Global Internet (Then) The tree structure of the Internet in 1990 The Global Internet (And Now) A simple multi-provider Internet 1 The Global Internet Some
More informationcs/ee 143 Communication Networks
cs/ee 143 Communication Networks Chapter 4 Internetworking Text: Walrand & Parekh, 2010 Steven Low CMS, EE, Caltech Warning These notes are not self-contained, probably not understandable, unless you also
More informationCSE 123: Computer Networks
CSE 123: Computer Networks Homework 2 Out: 10/18, Due: 10/25 Total points - 50 Question 1 Consider the network shown below, wherein horizontal lines represent transit providers and numbered vertical lines
More informationDa t e: August 2 0 th a t 9: :00 SOLUTIONS
Interne t working, Examina tion 2G1 3 0 5 Da t e: August 2 0 th 2 0 0 3 a t 9: 0 0 1 3:00 SOLUTIONS 1. General (5p) a) Place each of the following protocols in the correct TCP/IP layer (Application, Transport,
More informationNetwork Layer: Internet Protocol
Network Layer: Internet Protocol Motivation Heterogeneity Scale Intering IP is the glue that connects heterogeneous s giving the illusion of a homogenous one. Salient Features Each host is identified by
More informationComputer Networking Introduction
Computer Networking Introduction Halgurd S. Maghdid Software Engineering Department Koya University-Koya, Kurdistan-Iraq Lecture No.13 Chapter 4: outline 4.1 introduction 4.2 virtual circuit and datagram
More informationCS118 Discussion 1A, Week 6. Zengwen Yuan Dodd Hall 78, Friday 10:00 10:50 a.m.
CS118 Discussion 1A, Week 6 Zengwen Yuan Dodd Hall 78, Friday 10:00 10:50 a.m. 1 Outline Network Layer Overview: data v.s. control plane IPv4/IPv6, DHCP, NAT Project 2 spec Midterm review 2 Network layer:
More informationinternet technologies and standards
Institute of Telecommunications Warsaw University of Technology 2017 internet technologies and standards Piotr Gajowniczek Andrzej Bąk Michał Jarociński Network Layer The majority of slides presented in
More informationEnd-to-End Communication
End-to-End Communication Goal: Interconnect multiple LANs. Why? Diverse LANs speak different languages need to make them talk to each other Management flexibility global vs. local Internet Problems: How
More informationLecture 4 - Network Layer. Transport Layer. Outline. Introduction. Notes. Notes. Notes. Notes. Networks and Security. Jacob Aae Mikkelsen
Lecture 4 - Network Layer Networks and Security Jacob Aae Mikkelsen IMADA September 23, 2013 September 23, 2013 1 / 67 Transport Layer Goals understand principles behind network layer services: network
More informationChapter 4: Advanced Internetworking. Networking CS 3470, Section 1
Chapter 4: Advanced Internetworking Networking CS 3470, Section 1 Intra-AS and Inter-AS Routing a C C.b b d A A.a a b A.c c B.a a B c Gateways: perform inter-as routing amongst themselves b perform intra-as
More informationInternet Routing Protocols, DHCP, and NAT
Internet Routing Protocols, DHCP, and NAT Hwajung Lee Modified from Slides Courtesy of Cisco Networking Academy and the book titled Communication Networks by Leon-Garcia Contents Basic Routing Single Area
More informationCSE 1 23: Computer Networks
CSE 1 23: Computer Networks Homework 3 Out: 11/08, Due: 11/15 Instructions 1. Turn in a physical copy at the beginning of the class on 11/15 2. Ensure the top page of the HW has the following information
More informationInter-AS routing. Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley
Inter-AS routing Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley Some materials copyright 1996-2012 J.F Kurose and K.W. Ross, All Rights Reserved Chapter 4:
More informationECE 158A: Lecture 7. Fall 2015
ECE 158A: Lecture 7 Fall 2015 Outline We have discussed IP shortest path routing Now we have a closer look at the IP addressing mechanism We are still at the networking layer, we will examine: IP Headers
More informationTable of Contents Chapter 1 Tunneling Configuration
Table of Contents Table of Contents... 1-1 1.1 Introduction to Tunneling... 1-1 1.1.1 IPv6 over IPv4 Tunnel... 1-2 1.1.2 IPv4 over IPv4 Tunnel... 1-7 1.2 Tunneling Configuration Task List... 1-8 1.3 Configuring
More informationRouting Basics ISP/IXP Workshops
Routing Basics ISP/IXP Workshops 1 Routing Concepts IPv4 Routing Forwarding Some definitions Policy options Routing Protocols 2 IPv4 Internet uses IPv4 addresses are 32 bits long range from 1.0.0.0 to
More informationQuiz. Segment structure and fields Flow control (rwnd) Timeout interval. Phases transition ssthresh setting Cwnd setting
Quiz v 10/30/2013 (Wednesday), 20 mins v Midterm question (available on website) v TCP basics Segment structure and fields Flow control (rwnd) Timeout interval v TCP Congestion control Phases transition
More informationIT Certification Exams Provider! Weofferfreeupdateserviceforoneyear! h ps://
IT Certification Exams Provider! Weofferfreeupdateserviceforoneyear! h ps://www.certqueen.com Exam : JN0-343 Title : Juniper Networks Certified Internet Specialist (JNCIS-ENT) Version : DEMO 1 / 6 1.How
More informationRouter Architecture Overview
Chapter 4: r Introduction (forwarding and routing) r Review of queueing theory r Router design and operation r IP: Internet Protocol m IPv4 (datagram format, addressing, ICMP, NAT) m Ipv6 r Generalized
More informationChapter 4: Network Layer
Chapter 4: Introduction (forwarding and routing) Review of queueing theory Routing algorithms Link state, Distance Vector Router design and operation IP: Internet Protocol IPv4 (datagram format, addressing,
More informationCMPE 80N: Introduction to Networking and the Internet
CMPE 80N: Introduction to Networking and the Internet Katia Obraczka Computer Engineering UCSC Baskin Engineering Lecture 17 CMPE 80N Spring'10 1 Announcements Next class: Presentation of fun projects
More informationETSF10 Internet Protocols Routing on the Internet
ETSF10 Internet Protocols Routing on the Internet 2013, Part 2, Lecture 1.2 Jens Andersson (Kaan Bür) Routing on the Internet Unicast routing protocols (part 2) [ed.5 ch.20.3] Multicast routing, IGMP [ed.5
More informationLecture 3. The Network Layer (cont d) Network Layer 1-1
Lecture 3 The Network Layer (cont d) Network Layer 1-1 Agenda The Network Layer (cont d) What is inside a router? Internet Protocol (IP) IPv4 fragmentation and addressing IP Address Classes and Subnets
More informationECE 4450:427/527 - Computer Networks Spring 2017
ECE 4450:427/527 - Computer Networks Spring 2017 Dr. Nghi Tran Department of Electrical & Computer Engineering Lecture 6.2: IP Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks
More informationInter-networking. Problem. 3&4-Internetworking.key - September 20, LAN s are great but. We want to connect them together. ...
1 Inter-networking COS 460 & 540 2 Problem 3 LAN s are great but We want to connect them together...across the world Inter-networking 4 Internet Protocol (IP) Routing The Internet Multicast* Multi-protocol
More informationTopics for This Week
Topics for This Week Routing Protocols in the Internet OSPF, BGP More on IP Fragmentation and Reassembly ICMP Readings Sections 5.6.4-5.6.5 1 Hierarchical Routing aggregate routers into regions, autonomous
More informationThe Internet. The Internet is an interconnected collection of netw orks.
The Internet The Internet is an interconnected collection of netw orks. Internetw orking-1 Internetworking! Communications Network: A facility that provides a data transfer service among stations attached
More informationBack to basics J. Addressing is the key! Application (HTTP, DNS, FTP) Application (HTTP, DNS, FTP) Transport. Transport (TCP/UDP) Internet (IPv4/IPv6)
Routing Basics Back to basics J Application Presentation Application (HTTP, DNS, FTP) Data Application (HTTP, DNS, FTP) Session Transport Transport (TCP/UDP) E2E connectivity (app-to-app) Port numbers
More informationCS 43: Computer Networks Internet Routing. Kevin Webb Swarthmore College November 16, 2017
CS 43: Computer Networks Internet Routing Kevin Webb Swarthmore College November 16, 2017 1 Hierarchical routing Our routing study thus far - idealization all routers identical network flat not true in
More informationWhere we are in the Course
Network Layer Where we are in the Course Moving on up to the Network Layer! Application Transport Network Link Physical CSE 461 University of Washington 2 Network Layer How to connect different link layer
More informationCSc 450/550 Computer Networks Internet Routing
CSc 450/550 Computer Networks Internet Routing Jianping Pan Summer 2007 7/12/07 CSc 450/550 1 Review Internet Protocol (IP) IP header addressing class-based, classless, hierarchical, NAT routing algorithms
More informationIP Addresses McGraw-Hill The McGraw-Hill Companies, Inc., 2000
IP Addresses The IP addresses are unique. An IPv4 address is a 32-bit address. An IPv6 address is a 128-bit address. The address space of IPv4 is 2 32 or 4,294,967,296. The address space of IPv6 is 2 128
More informationEEC-684/584 Computer Networks
EEC-684/584 Computer Networks Lecture 14 wenbing@ieee.org (Lecture nodes are based on materials supplied by Dr. Louise Moser at UCSB and Prentice-Hall) Outline 2 Review of last lecture Internetworking
More informationRouting Basics. SANOG July, 2017 Gurgaon, INDIA
Routing Basics SANOG 30 14-18 July, 2017 Gurgaon, INDIA Back to basics J Application Presentation Application (HTTP, DNS, FTP) Data Application (HTTP, DNS, FTP) Session Transport Transport (TCP/UDP) E2E
More informationCSC 401 Data and Computer Communications Networks
CSC 401 Data and Computer Communications Networks Network Layer IPv4, Format and Addressing,, IPv6 Prof. Lina Battestilli Fall 2017 Chapter 4 Outline Network Layer: Data Plane 4.1 Overview of Network layer
More informationIP Addressing & Interdomain Routing. Next Topic
IP Addressing & Interdomain Routing Next Topic IP Addressing Hierarchy (prefixes, class A, B, C, subnets) Interdomain routing Application Presentation Session Transport Network Data Link Physical Scalability
More informationRouting Concepts. IPv4 Routing Forwarding Some definitions Policy options Routing Protocols
Routing Basics 1 Routing Concepts IPv4 Routing Forwarding Some definitions Policy options Routing Protocols 2 IPv4 Internet uses IPv4 Addresses are 32 bits long Range from 1.0.0.0 to 223.255.255.255 0.0.0.0
More informationCCNA 1 Chapter 6 v5.0 Exam Answers 2013
CCNA 1 Chapter 6 v5.0 Exam Answers 2013 1 After troubleshooting a router, the network administrator wants to save the router configuration so that it will be used automatically the next time that the router
More informationData Communication & Networks G Session 7 - Main Theme Networks: Part I Circuit Switching, Packet Switching, The Network Layer
Data Communication & Networks G22.2262-001 Session 7 - Main Theme Networks: Part I Circuit Switching, Packet Switching, The Network Layer Dr. Jean-Claude Franchitti New York University Computer Science
More informationCS 43: Computer Networks. 21: The Network Layer & IP November 7, 2018
CS 43: Computer Networks 21: The Network Layer & IP November 7, 2018 The Network Layer! Application: the application (e.g., the Web, Email) Transport: end-to-end connections, reliability Network: routing
More informationNetwork Layer: Control/data plane, addressing, routers
Network Layer: Control/data plane, addressing, routers CS 352, Lecture 10 http://www.cs.rutgers.edu/~sn624/352-s19 Srinivas Narayana (heavily adapted from slides by Prof. Badri Nath and the textbook authors)
More informationInternet Routing Basics
Internet Routing Basics Back to basics J Application Presentation Application (HTTP, DNS, FTP) Data Application (HTTP, DNS, FTP) Session Transport Transport (TCP/UDP) E2E connectivity (app-to-app) Port
More informationLARGE SCALE IP ROUTING
Building ISP Networks Xantaro Page 1 / 18 TABLE OF CONTENTS 1. LAB ACCESS 4 1.1 Accessing the Jumphost... 4 1.2 Access to your routers... 4 1.3 Local Network Topology... 5 1.4 Global Network Topology...
More informationComputer Networks II IPv4 routing
Dipartimento di Informatica e Sistemistica Computer Networks II IPv4 routing Luca Becchetti Luca.Becchetti@dis.uniroma1.it A.A. 2009/2010 NEXT WEEK... 2 exercise classes on topics covered so far Please
More informationHierarchical Routing. Our routing study thus far - idealization all routers identical network flat no true in practice. administrative autonomy
Hierarchical Routing Our routing study thus far - idealization all routers identical network flat no true in practice scale: with 50 million destinations: can t store all dest s in routing tables! routing
More informationTop-Down Network Design, Ch. 7: Selecting Switching and Routing Protocols. Top-Down Network Design. Selecting Switching and Routing Protocols
Top-Down Network Design Chapter Seven Selecting Switching and Routing Protocols Copyright 2010 Cisco Press & Priscilla Oppenheimer 1 Switching 2 Page 1 Objectives MAC address table Describe the features
More informationLecture 5 The Network Layer part II. Antonio Cianfrani DIET Department Networking Group netlab.uniroma1.it
Lecture 5 The Network Layer part II Antonio Cianfrani DIET Department Networking Group netlab.uniroma1.it IP datagram format IP protocol version number header length (bytes) type of data max number remaining
More informationIntroduction to Computer Networks
Introduction to Computer Networks Tian Song ( 嵩天 ), Ph.D., Assoc. Prof. songtian@bit.edu.cn Introduction to Computer Networks ICMP, ARP, DHCP, OSPF, BGP Tian Song ( 嵩天 ), Ph.D., Assoc. Prof. songtian@bit.edu.cn
More informationChapter 4 Network Layer
Chapter 4 Network Layer Computer Networking A Top-Down Approach These slides are based on the slides made available by Kurose and Ross. All material copyright 1996-2012 J.F Kurose and K.W. Ross, All Rights
More informationComputer Networks CS 552
Computer Networks CS 552 Badri Nath Rutgers University badri@cs.rutgers.edu 1. Link Layer, Multiple access 2. IP addressing, CIDR, NAT 3. IP/L3 routing, OSPF (link state), RIP(DV), Issues 4. L2 routing
More informationInternetworking/Internetteknik, Examination 2G1305 Date: August 18 th 2004 at 9:00 13:00 SOLUTIONS
Internetworking/Internetteknik, Examination 2G1305 Date: August 18 th 2004 at 9:00 13:00 SOLUTIONS 1. General (5p) a) The so-called hourglass model (sometimes referred to as a wine-glass ) has been used
More informationInternet Network Protocols IPv4/ IPv6
Internet Network Protocols IPv4/ IPv6 Prof. Anja Feldmann, Ph.D. anja@inet.tu-berlin.de TCP/IP Illustrated, Volume 1, W. Richard Stevens http://www.kohala.com/start 1 IP Interfaces IP address: identifier
More informationHierarchical Routing. Our routing study thus far - idealization all routers identical network flat not true in practice
Hierarchical Routing Our routing study thus far - idealization all routers identical network flat not true in practice scale: with 200 million destinations: can t store all destinations in routing tables!
More information1-1. Switching Networks (Fall 2010) EE 586 Communication and. October 25, Lecture 24
EE 586 Communication and Switching Networks (Fall 2010) Lecture 24 October 25, 2010 1-1 Announcements Midterm 1: Mean = 92.2 Stdev = 8 Still grading your programs (sorry about the delay) Network Layer
More informationChapter 19 Network Layer: Logical Addressing
Chapter 19 Network Layer: Logical Addressing 19.1 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 19.2 19-1 IPv4 ADDRESSES An IPv4 address is a 32-bit address
More informationInter-Autonomous-System Routing: Border Gateway Protocol
Inter-Autonomous-System Routing: Border Gateway Protocol Antonio Carzaniga Faculty of Informatics University of Lugano June 14, 2005 Outline Hierarchical routing BGP Routing Routing Goal: each router u
More informationRouting Basics ISP/IXP Workshops
Routing Basics ISP/IXP Workshops 1 Routing Concepts IPv4 Routing Forwarding Some definitions Policy options Routing Protocols 2 IPv4 Internet uses IPv4 addresses are 32 bits long range from 1.0.0.0 to
More informationCSC458 Lecture 6. Administrivia. Inter-domain Routing IP Addressing. Midterm will Cover Following Topics (2) Midterm will Cover Following Topics
CSC458 Lecture 6 Inter-domain Routing IP Addressing Administrivia Homework: #2 due today #3 out today, due in two weeks (same date as midterm) No lecture next week Reading Week Midterm in two weeks 60
More informationCSCE 463/612 Networks and Distributed Processing Spring 2018
CSCE 463/612 Networks and Distributed Processing Spring 2018 Network Layer II Dmitri Loguinov Texas A&M University April 3, 2018 Original slides copyright 1996-2004 J.F Kurose and K.W. Ross 1 Chapter 4:
More informationIP: Addressing, ARP, Routing
IP: Addressing, ARP, Routing Network Protocols and Standards Autumn 2004-2005 Oct 21, 2004 CS573: Network Protocols and Standards 1 IPv4 IP Datagram Format IPv4 Addressing ARP and RARP IP Routing Basics
More informationCS 43: Computer Networks. 24: Internet Routing November 19, 2018
CS 43: Computer Networks 24: Internet Routing November 19, 2018 Last Class Link State + Fast convergence (reacts to events quickly) + Small window of inconsistency Distance Vector + + Distributed (small
More informationNetwork Layer Week 5. Module : Computer Networks Lecturer: Lucy White Office : 324
Network Layer Week 5 Module : Computer Networks Lecturer: Lucy White lbwhite@wit.ie Office : 324 1 Network Layer Network Layer Protocols Common Network Layer Protocols Internet Protocol version 4 (IPv4)
More informationRouting Overview. Information About Routing CHAPTER
21 CHAPTER This chapter describes underlying concepts of how routing behaves within the ASA, and the routing protocols that are supported. This chapter includes the following sections: Information About
More informationCS 43: Computer Networks Internet Routing. Kevin Webb Swarthmore College November 14, 2013
CS 43: Computer Networks Internet Routing Kevin Webb Swarthmore College November 14, 2013 1 Reading Quiz Hierarchical routing Our routing study thus far - idealization all routers identical network flat
More informationCisco CCNA Basic IP Routing Part I
Cisco CCNA Basic IP Routing Part I Cisco CCNA IP Routing In this chapter, we re to discuss the IP routing process. This is an important subject to understand since it pertains to all routers and configurations
More informationCSCI-1680 Network Layer: IP & Forwarding Rodrigo Fonseca
CSCI-1680 Network Layer: IP & Forwarding Rodrigo Fonseca Based partly on lecture notes by David Mazières, Phil Levis, John Jannotti Today Network layer: Internet Protocol (v4) Forwarding Next 2 classes:
More informationIntroduction to OSPF
Introduction to OSPF ISP/IXP Workshops ISP/IXP Workshops 1999, Cisco Systems, Inc. 1 OSPF Dynamic Routing Protocol Link State technology Runs over IP, protocol 89 Designed by IETF for TCP/IP Supports VLSM
More informationNetwork Layer. Chapter 5 Section 5.1, 5.3, 5.5, 5.6. CS 360 Spring 2012 Pacific University
Network Layer Chapter 5 Section 5.1, 5.3, 5.5, 5.6 Network with Routers zeus.cs.pacificu.edu you.yourisp.com HTTP TCP IP Router Router HTTP TCP IP Router Router Router Network Layer Goal: Routing Routers
More informationCSCI Computer Networks Fall 2016
source: computer-s-webdesign.com CSCI 4760 - Computer Networks Fall 2016 Instructor: Prof. Roberto Perdisci perdisci@cs.uga.edu These slides are adapted from the textbook slides by J.F. Kurose and K.W.
More information