internet lab ilab1 basics
play

Internet Lab (iLab1) Basics Minoo Rouhi ilab1@net.in.tum.de Chair - PowerPoint PPT Presentation

Jan 21, 2024 •362 likes •609 views

Chair of Network Architectures and Services Department of Informatics Technical University of Munich Internet Lab (iLab1) Basics Minoo Rouhi ilab1@net.in.tum.de Chair of Network Architectures and Services Department of Informatics Technical

  1. Chair of Network Architectures and Services Department of Informatics Technical University of Munich Internet Lab (iLab1) Basics Minoo Rouhi ilab1@net.in.tum.de Chair of Network Architectures and Services Department of Informatics Technical University of Munich Lab 1 – WiSe 2018

  2. Outline Internet protocol architecture MAC addresses Internet protocol L3 address resolution Next Steps 1/22

  3. Outline Internet protocol architecture MAC addresses Internet protocol L3 address resolution Next Steps 2/22

  4. Layer model Internet example protocols ISO/OSI concept DNS, DHCPv6, HTTP , Tor, 7. application application . . . 6. presentation 5. session 4. transport transport TCP , UDP 3. network network IPv6, ICMP , IPSec 2. data link link Ethernet, WLAN 1. physical 3/22

  5. Example: HTTP communication in a local area network HTTP protocol browser HTTP server TCP protocol TCP TCP IP protocol IP IP Ethernet protocol Ethernet driver Ethernet driver Ethernet 4/22

  6. Example: two networks connected with a router HTTP protocol browser HTTP server TCP protocol TCP TCP router IP protocol IP protocol IP IP IP Ethernet WLAN Ethernet Ethernet WLAN WLAN protocol protocol driver driver driver driver wireless LAN Ethernet 5/22

  7. Encapsulation of data in the protocol stack user data application header user data application data TCP header segment/datagram IP header TCP header application data packet/datagram Ethernet IP header TCP header application data Ethernet header trailer frame 6/22

  8. Terminology network layer SDU IP header network layer PDU Ethernet data link layer SDU Ethernet header trailer data link layer PDU • Protocol Data Unit • Service Data Unit • Interface: service access point (SAP) 7/22

  9. Design decisions • no state between sender and destination • end-to-end principle • separation of packet forwarding and routing 8/22

  10. Destinations • unicast • broadcast • multicast 9/22

  11. Outline Internet protocol architecture MAC addresses Internet protocol L3 address resolution Next Steps 10/22

  12. Layer 2 addresses/frame • MAC addresses, “physical address” • specific for medium • Ethernet/WLAN: 48 bit 1 bit invividual/group (multicast or broadcast) • 1 bit globally (factory default)/locally administered • vendor and product information • • not hierarchical Why are MAC addresses not used for addressing devices on the Internet? 11/22

  13. Ethernet layer 2 0 15 16 31 destination address source address  type      service data unit     ❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤    ❤ 46-1500 ❤ ❤ ❤ ❤ ❤ ❤ octets ❤ ❤ ❤ ❤ ❤  ❤  ❤ ❤  ❤ ❤  ❤ ❤  ❤ ❤  ❤ ❤ ❤  ❤  ❤ ❤   . . .   frame check sequence 12/22

  14. Layer 2 traffic switch PC 0 PC 1 A B C PC 2 PC 0 transmits: 1. destination MAC PC 1 2. destination MAC FF:FF:FF:FF:FF:FF 13/22

  15. Layer 2 traffic switch PC 0 PC 1 A B C PC 2 switch table: port address A MAC PC 0 13/22

  16. Outline Internet protocol architecture MAC addresses Internet protocol L3 address resolution Next Steps 14/22

  17. Internet Protocol • packet switched • best effort • connectionless • unreliable • no flow control 15/22

  18. IPv6 header 0 3 4 11 12 15 16 23 24 31 version traffic class flow label payload length hop limit next header source destination extension headers or payload 16/22

  19. IPv4 header 0 3 4 11 12 15 16 23 24 31 total length version hdr len DSCP/ECN flags fragment offset identification protocol time to live header checksum source address destination address options or payload Flags will be used for fragmenting packets. 17/22

  20. Internet control message protocol 0 7 8 15 16 31 type code checksum depends • IPv6 next header: 58 • IPv4 protocol: 1 • similarities between ICMPv6 and ICMPv4 • kind of on L3 purpose, e.g., • destination unreachable • time to live exceeded • neighbor discovery 18/22

  21. Outline Internet protocol architecture MAC addresses Internet protocol L3 address resolution Next Steps 19/22

  22. Neighbor Discovery Protocol A B PC 0 PC 1 2001:DB8::1 2001:DB8::2 C PC 2 2001:DB8::3 Request/response protocol flow • Neighbor Solicitation (NS): What is the MAC of 2001:DB8::2? • Neighbor Advertisement (NA): MAC of 2001:DB8::2 is MAC PC 1 . 20/22

  23. Outline Internet protocol architecture MAC addresses Internet protocol L3 address resolution Next Steps 21/22

  24. Next steps • You should now have access to the Basics prelab • Enter your lab slot preference until tomorrow noon! • Results will be published tomorrow after the deadline has passed 22/22

Recommend

Internet Lab (iLab1) Basics Lars Wstrich ilab1@net.in.tum.de Chair of Network Architectures

Internet Lab (iLab1) Basics Lars Wstrich ilab1@net.in.tum.de Chair of Network Architectures

Chair of Network Architectures and Services Department of Informatics Technical University of Munich Internet Lab (iLab1) Basics Lars Wstrich ilab1@net.in.tum.de Chair of Network Architectures and Services Department of Informatics

240 views • 22 slides
Internet Lab (iLab1) Introduction to Cryptography Lars Wstrich ilab1@net.in.tum.de Chair of

Internet Lab (iLab1) Introduction to Cryptography Lars Wstrich ilab1@net.in.tum.de Chair of

Chair of Network Architectures and Services Department of Informatics Technical University of Munich Internet Lab (iLab1) Introduction to Cryptography Lars Wstrich ilab1@net.in.tum.de Chair of Network Architectures and Services Department

694 views • 57 slides
Internet Lab (iLab1) Domain Name Sytem Dominik Scholz ilab1@net.in.tum.de Chair of Network

Internet Lab (iLab1) Domain Name Sytem Dominik Scholz ilab1@net.in.tum.de Chair of Network

Chair of Network Architectures and Services Department of Informatics Technical University of Munich Internet Lab (iLab1) Domain Name Sytem Dominik Scholz ilab1@net.in.tum.de Chair of Network Architectures and Services Department of

1.01k views • 54 slides
Internet Lab (iLab1) Wireless Networks Lars Wstrich ilab1@net.in.tum.de Chair of Network

Internet Lab (iLab1) Wireless Networks Lars Wstrich ilab1@net.in.tum.de Chair of Network

Chair of Network Architectures and Services Department of Informatics Technical University of Munich Internet Lab (iLab1) Wireless Networks Lars Wstrich ilab1@net.in.tum.de Chair of Network Architectures and Services Department of

715 views • 32 slides
Internet Lab (iLab1) NAT / DHCP Dominik Scholz ilab1@net.in.tum.de Chair of Network

Internet Lab (iLab1) NAT / DHCP Dominik Scholz ilab1@net.in.tum.de Chair of Network

Chair of Network Architectures and Services Department of Informatics Technical University of Munich Internet Lab (iLab1) NAT / DHCP Dominik Scholz ilab1@net.in.tum.de Chair of Network Architectures and Services Department of Informatics

1.11k views • 63 slides
Voice over the Internet (the basics) Outline Basics about voice encoding Packetization

Voice over the Internet (the basics) Outline Basics about voice encoding Packetization

Voice over the Internet (the basics) Outline Basics about voice encoding Packetization trade-offs Architecture of basic VoIP tool Playback buffer (jitter buffer) Adaptive playback buffers? How to deal with packet losses and

409 views • 30 slides
Security and Networking Basics Security and Networking Basics Internet Security [1] VU Engin

Security and Networking Basics Security and Networking Basics Internet Security [1] VU Engin

Security and Networking Basics Security and Networking Basics Internet Security [1] VU Engin Kirda engin@infosys.tuwien.ac.at Christopher Kruegel chris@auto.tuwien.ac.at Outline Introduction and Motivation Security Threats Open

725 views • 46 slides
2.2 Internet Basics Objectives Describe the difference between Internet and World Wide Web.

2.2 Internet Basics Objectives Describe the difference between Internet and World Wide Web.

2.2 Internet Basics Objectives Describe the difference between Internet and World Wide Web. Describe web browsers and their uses. Identify screen components of Internet Explorer. Objectives Identify the basic parts of the World

529 views • 49 slides
Internet routing is based on routing protocols that collect the input data No off-line route

Internet routing is based on routing protocols that collect the input data No off-line route

Introduction to Routing in Internet Internet basics IPv4 and ICMP Internet Addressing ARP - Address Resolution Protocol Routing Information (Distance Vector ) Protocol Principles 3-1 S-38.121 S-02 Rka, NB Internet routing is based on

214 views • 18 slides
The Internet Protocol (IP) Part 1: Basics

The Internet Protocol (IP) Part 1: Basics

COLE POLYTECHNIQUE FDRALE DE LAUSANNE The Internet Protocol (IP) Part 1: Basics Contents

440 views • 25 slides
iLab DNS and DNSSEC Dominik Scholz Slides by Benjamin Hof ilab1 @list.net.in.tum.de Chair of

iLab DNS and DNSSEC Dominik Scholz Slides by Benjamin Hof ilab1 @list.net.in.tum.de Chair of

iLab DNS and DNSSEC Dominik Scholz Slides by Benjamin Hof ilab1 @list.net.in.tum.de Chair of Network Architectures and Services Department of Informatics Technical University of Munich Lab 5 17ws 1 / 32 Outline Domain Name System

853 views • 58 slides
New gTLD Basics New Internet Extensions Agenda Overview of

New gTLD Basics New Internet Extensions Agenda Overview of

New gTLD Basics New Internet Extensions Agenda Overview of domain names The history of the program What is a registry Why ICANN is

531 views • 34 slides
New gTLD Basics New Internet Extensions Agenda Overview about domain names, gTLD timeline and

New gTLD Basics New Internet Extensions Agenda Overview about domain names, gTLD timeline and

New gTLD Basics New Internet Extensions Agenda Overview about domain names, gTLD timeline and the New gTLD Program Why is ICANN doing this; potential impact of this initiative to businesses, governments, Internet communities and users

555 views • 30 slides
New gTLD Basics New Internet Exentsions Agenda Overview about domain names, gTLD timeline and

New gTLD Basics New Internet Exentsions Agenda Overview about domain names, gTLD timeline and

New gTLD Basics New Internet Exentsions Agenda Overview about domain names, gTLD timeline and the New gTLD Program Why is ICANN doing this; potential impact of this initiative to businesses, governments, Internet communities and users

577 views • 31 slides
CMPSC 497 Security Basics Trent Jaeger Systems and Internet Infrastructure Security (SIIS)

CMPSC 497 Security Basics Trent Jaeger Systems and Internet Infrastructure Security (SIIS)

Systems and Internet Infrastructure Security Network and Security Research Center Department of Computer Science and Engineering Pennsylvania State University, University Park PA CMPSC 497 Security Basics Trent Jaeger Systems and Internet

397 views • 28 slides
Static Analysis Basics II Trent Jaeger Systems and Internet Infrastructure Security (SIIS) Lab

Static Analysis Basics II Trent Jaeger Systems and Internet Infrastructure Security (SIIS) Lab

Systems and Internet Infrastructure Security Network and Security Research Center Department of Computer Science and Engineering Pennsylvania State University, University Park PA Static Analysis Basics II Trent Jaeger Systems and Internet

742 views • 48 slides
Server Side Internet Programming Objectives The basics of servlets mapping and

Server Side Internet Programming Objectives The basics of servlets mapping and

Server Side Internet Programming Server Side Internet Programming Objectives The basics of servlets mapping and configuration compilation and execution Cookies and sessions Request and session attributes JSP execution,

946 views • 53 slides
iLab Basics Benjamin Hof hof@in.tum.de Lehrstuhl fr Netzarchitekturen und Netzdienste

iLab Basics Benjamin Hof hof@in.tum.de Lehrstuhl fr Netzarchitekturen und Netzdienste

iLab Basics Benjamin Hof hof@in.tum.de Lehrstuhl fr Netzarchitekturen und Netzdienste Fakultt fr Informatik Technische Universitt Mnchen Lab 1 15ss 1 Outline Internet protocol architecture MAC addresses Internet protocol

241 views • 21 slides
Internet Security Enhanced Security Services for S/MIME Thomas Gttlicher April 20, 2004

Internet Security Enhanced Security Services for S/MIME Thomas Gttlicher April 20, 2004

Internet Security Enhanced Security Services for S/MIME Thomas Gttlicher April 20, 2004 Agenda Basics Technical Signed receipts Security labels Secure mailing lists Signed certificates 1 Basics Basics

956 views • 74 slides
Future Internet Chapter 5: Network Function Virtualization 5a: Basics Holger Karl Computer

Future Internet Chapter 5: Network Function Virtualization 5a: Basics Holger Karl Computer

Future Internet Chapter 5: Network Function Virtualization 5a: Basics Holger Karl Computer Networks Group Universitt Paderborn Overview Technical trends & motivation Reference architectures: ETSI, IETF Problems to solve

647 views • 47 slides
Personal Internet Security Basics Dan Ficker Twin Cities DrupalCamp 2018 Overview Security

Personal Internet Security Basics Dan Ficker Twin Cities DrupalCamp 2018 Overview Security

Personal Internet Security Basics Dan Ficker Twin Cities DrupalCamp 2018 Overview Security is an aspiration, not a state. Encryption is your friend. Passwords are very important. Make a back-up plan. About Me

386 views • 35 slides
No Yes Do you use the Internet to do homework? Do you use the Internet to follow your

No Yes Do you use the Internet to do homework? Do you use the Internet to follow your

No Yes Do you use the Internet to do homework? Do you use the Internet to follow your favourite team? Do you use the internet to watch music videos? Do you use the Internet to read the news? Do you use the Internet to play games? Shared

997 views • 51 slides
Competition, Regulation, and Broadband Access to the Internet Georg Gtz

Competition, Regulation, and Broadband Access to the Internet Georg Gtz

Competition, Regulation, and Broadband Access to the Internet Georg Gtz Justus-Liebig-Universitt Gieen Basics Broadband internet access Speed > ISDN (2*64kbit/s) Always online ADSL (Asymmetric Digital Subscriber

346 views • 31 slides
Internet Security Certficate Extensions and Attributes Supporting Authentication in PPP and

Internet Security Certficate Extensions and Attributes Supporting Authentication in PPP and

Internet Security Certficate Extensions and Attributes Supporting Authentication in PPP and Wireless LAN Daniel Schwarz Nrnberg, Internet Security Dozent: Prof. Dr. Trommler 27.April 2004 Overview: 1. Introduction I. PKIX 2. Basics

560 views • 35 slides

More recommend