Ppt on layer 3 switching vs routing

High-Speed Internet Switches and Routers

5 Host B Host E Node 7 Node 6 Node 4 Packet-Switching vs. Circuit-Switching Most important advantage of packet-switching over circuit switching: Ability to exploit statistical multiplexing: efficient bandwidth usage; ratio between peek and average rate is 3:1 for audio, and 15:1 for data traffic However, packet-switching needs to deal with congestion: more complex routers harder to provide good network services/


1 Tutorial on Network Layers 2 and 3 Radia Perlman Intel Labs

, multiplexing, bridges, spanning tree algorithm layer 3: addresses, neighbor discovery, connectionless vs connection-oriented –Routing protocols Distance vector Link state Path vector Layer 2 ½... as if 2 vs 3 weren’t confusing enough 5 Why this whole layer 2/3 thing? Myth: bridges/switches simpler devices, designed before routers OSI Layers –1: physical 6 Why this whole layer 2/3 thing? Myth: bridges/switches simpler devices, designed before routers OSI Layers –1: physical –2: data/


& Physical Layers & Physical Layers 5-1 Link & Physical Layers Computer Networks Shahrood University.

bridges, and switches 5.10 Point to Point Protocol ali.dmohammadi @gmail.comLink & Physical Layers ali.dmohammadi @gmail.comLink & Physical Layers 5-3 Some terminology:  hosts and routers are nodes (bridges and switches too)  /Physical Layers ali.dmohammadi @gmail.comLink & Physical Layers 5-103 Bridges vs. Routers  Both store-and-forward devices  routers: network layer devices (examine network layer headers)  bridges are link layer devices  Routers maintain routing tables, implement routing /


Programming Multi-Core Processors based Embedded Systems A Hands-On Experience on Cavium Octeon based Platforms Lecture 4: Layering & Deep Packet Inspection.

Layer (3) Networks are leveraging from multi-core systems One or more cores dedicated to routing/switching Other cores for application layer processing Performance challenges: Layer 2 and 3 devices operate at link speeds Users expect same performance even with application layer/Performance Evaluation We consider two case studies Case study: DPI String matching using regular expression Regular vs. optimized regular expressions Case study: deep message inspection XML based message content TCP termination  /


1 Chapter 3 Internetworking. Problems  In Chapter 2 we saw how to connect one node to another, or to an existing network. How do we build networks of.

different types of networks to build a large global network? Chapter Outline 3.1 Switching and Bridging 3.2 Basic Interworking (IP) 3.3 Routing 3.4 Implementation and Performance  Two limitations on the directly connected networks limit/198 IP (Network) Layer  Forwarding table mapping from destination network id (NetNum) to next-hop (or interface) of forwarding  Update the table manually configured (static route) dynamically learned from routing protocol 199 Forwarding vs. Routing  Forwarding taking a/


5-1 Link & Physical Layers (2-89-90) Link & Physical Layers Computer Networks.

of successful transmission of a frame α Time units 5-64 Link & Physical Layers (2-89-90) Throughput vs Offered Load-Average Collision Time A collision in the channel: transmission Unit time α/Routing to another LAN’ 5-90 Link & Physical Layers (2-89-90) Chapter 5 outline 5.1 Introduction and services 5.2 Error detection and correction 5.3 Links and Access Protocols 5.4 Ethernet 5.5 Ethernet Model 5.6 Ethernet Frame Structure 5.7 LAN addresses and ARP 5.8 Ethernet Technologies 5.9 Hubs, bridges, and switches/


Computer Networking Packet Switching Networks Dr Sandra I. Woolley.

alternative to serially transferred interconnection fabrics which can cause bottlenecks.  Large switches built from crossbar and multistage space switches  Can buffer at input, output, or both (performance vs. complexity) 1 2 3 N 123N Inputs Outputs (a) Input buffering 38 3 … … 1 2 3 N 123N Inputs Outputs (b) Output buffering … … 19 Self-Routing Switches: A Banyan Switch  Self-routing switches do not require a controller.  The output port number determines/


CSC581 Communication Networks II Chapter 7a: Wide Area Network and Switching Techniques Dr. Cheer-Sun Yang.

CSC581 Communication Networks II Chapter 7a: Wide Area Network and Switching Techniques Dr. Cheer-Sun Yang 2 Topics Circuit switching (p. 23-24) Message switching (p. 25) Packet switching (p. 26-28) –Datagram –Virtual Circuit Example of Packet Switching Protocol: X. 25 (Section 7.3) 3 Network Layer Functions Switching (layer 3 switching): packet switching Routing Fragmentation and assembly Congestion Control Internetworking 4 WAN vs. LAN Wide area network (WAN) is the “cloud” that we’ve/


William Stallings Data and Computer Communications 7 th Edition Chapter 10 Circuit Switching and Packet Switching.

Better if few packets —More flexible Routing can be used to avoid congested/failed parts of the network Packet Size Fig. 10.14 Circuit vs Packet Switching Performance —Propagation delay —Transmission time —Node (processing) delay Event Timing X.25 1976 Interface between host and packet switched network Almost universal on packet switched networks and packet switching in ISDN Defines three layers —Physical —Link —Packet X.25 - Physical/


Part 5: Data Link Layer CSE 3461/5461 Reading: Chapter 5, Kurose and Ross 1.

, S 2, S 3, S 4 A B S1S1 C D E F S2S2 S4S4 S3S3 H I G 51 Institutional Network To external network Router IP subnet Mail server Web server 52 Switches vs. Routers Both are store-and-forward: Routers: network-layer devices (examine network- layer headers) Switches: link-layer devices (examine link-layer headers) Both have forwarding tables: Routers: compute tables using routing algorithms, IP addresses/


1 ATM and Multi-Protocol Label Switching (MPLS) By Behzad Akbari Spring 2011 These slides are based in parts on the slides of J. Kurose (UMASS) and Shivkumar.

layer ATM network: moves cell along VC to destination at Destination Host:  AAL5 reassembles cells into original datagram  if CRC OK, datagram is passed to IP 18 IP-Over-ATM Issues: IP datagrams into ATM AAL5 PDUs from IP addresses to ATM addresses  just like IP addresses to 802.3 MAC addresses! ATM network Ethernet LANs 19 Re-examining Basics: Routing vs Switching 20 IP Routing vs/


1 CSE524: Lecture 5 Data-link Layer (Part 2). 2 Administrative Reading assignment –Chapter 5.5-5.11 –Due Wednesday, Oct. 8 Homework #2 –Due Monday, Oct.

DL: Frame Relay (more) Flag bits, 01111110, delimit frame address: –10 bit VC ID field –3 congestion control bits FECN: forward explicit congestion notification (frame experienced congestion on path) BECN: congestion on reverse /79 DL: Ethernet Switches (more) Dedicated Shared 80 DL: Bridges vs. Routers both store-and-forward devices –routers: network layer devices (examine network layer headers) –bridges are Link Layer devices routers maintain routing tables, implement routing algorithms bridges maintain /


T-110.5140 Network Application Frameworks and XML Routing and mobility 12.2.2008 Sasu Tarkoma Based on slides by Pekka Nikander.

Exterior Gateway Protocols (BGP)... Layer 3 Forwarding Engine FIB Table Adjacency Table LookupRewrite L3 PACKET Control Plane (software) Data Plane forwards packets in hardware Forwarding Different types of routing n Source routing u Path selection by sender u Path encoded in the packet u High cost for the sender node u Strict source routing vs. loose source routing n Hop-by-hop routing u Router selects the next/


CS740 - Review Aditya Akella 01/25/08. Network Communication: Lots of Functions Needed Links Multiplexing Routing Addressing/naming (locating peers) Reliability.

36 01 16 11 Bridge 1 3 2 Spanning Tree Bridges More complex topologies can provide redundancy. –But can also create loops. What is the problem with loops? Solution: spanning tree Host 1Host 2Host 3Host 4Host 5 Host 7Host 8Host 9Host AHost B Host 6 Host C Bridge Outline Switching and Multiplexing Link-Layer Routing-Layer –IP –IP Routing –MPLS Physical-Layer IP Addresses Fixed length: 32/


1 CSCD 330 Network Programming Fall 2013 Some Material in these slides from J.F Kurose and K.W. Ross All material copyright 1996-2007 Lecture 3 Introduction.

: loss, delay, throughput Protocol layers, service models History Start Here Last time … Presented an overview of the Internet Network of networks … Backbone routers owned mostly by Telephone and cable companies Not the government, not universities Complex set of policies dictate routes and passage through the backbone Not obvious to most users Today discuss alternative network models 3 4 Broadcast vs. Switched Communication Networks Broadcast networks/


4/11/2003 Edward Chow Content Switch 1 Introduction to Content Switch C. Edward Chow Department of Computer Science University of Colorado at Colorado.

based on Layer 3-4 info — fixe field/fast hash Layer 7 info — var. length/slow parsing Real Server 4/11/2003 Edward Chow Content Switch 14 Comparison of/.20.110 netmask 255.255.255.255 broadcast 172.26.20.110 up route add -host 172.26.20.110 dev tunl0 echo 1 > /proc/sys/VS-Tunnel or VS-DR be implemented using Content Switch?..... client cs.gif rocky.mid uccs.jpg Content Switch server1 server2 server9 4/11/2003 Edward Chow Content Switch 60 Content Switch Rule Survey Survey shows that existing switches/


1/25/20051 CO internetworking (intra-domain + inter-layer) work in progress Malathi Veeraraghavan, Xuan Zheng, Zhanxiang Huang {mv5g, xuan,

Zheng {mv5g, zh4c, xuan}@virginia.eduxuan}@virginia.edu Nov. 25, 2004 1/25/200575 Research vs. eng. problems Problem statement –How to create connections (rate-guaranteed allocations) across CO networks that /switch and switch-to-switch link capacity be divided between the pretend links before advertising – estimates? Actual routing of connections to make these pretend links real can be changed during setup. Switching capabilities on these links are easy – if GW1 supports VLAN over MPLS as well as Layer 3/


1 CSE524: Lecture 17 Data-link layer Specific link layers and devices.

) Flag bits, 01111110, delimit frame address: –10 bit VC ID field –3 congestion control bits FECN: forward explicit congestion notification (frame experienced congestion on path)/switching” –Frame forwarded from input to output port without awaiting for assembly of entire frame –Slight reduction in latency 37 DL: Bridges vs. Routers both store-and-forward devices –routers: network layer devices (examine network layer headers) –bridges are Link Layer devices routers maintain routing tables, implement routing/


5: DataLink Layer5a-1 14: Ethernet, Hubs, Bridges, Switches, Other Technologies used at the Link Layer, ARP Last Modified: 1/26/2016 7:52:07 PM.

partial frames) 5: DataLink Layer5a-32 Common Topology Dedicated Shared 5: DataLink Layer5a-33 Bridges vs. Switches vs. Routers r Switches = sophisticated multi-port bridges r All store-and-forward devices m routers: Layer 3 (network layer) devices m Bridges/switches are Layer 2 (Link Layer) devices r routers maintain routing tables, implement routing algorithms r Bridges/switches maintain filtering tables, implement filtering, learning and spanning tree algorithms 5: DataLink Layer5a-34 Routers/


M. Papatriantafilou – Link Layer Based on the book Computer Networking: A Top Down Approach, Jim Kurose, Keith Ross, Addison-Wesley. Course on Computer.

time) in each round unused slots go idle – example: 6-station LAN, 1,3,4 have pkt, slots 2,5,6 idle FDMA: frequency division multiple access r /Layer 5-53 hub switch collision domain M. Papatriantafilou – Link Layer Link Layer 5-54 Switches vs. routers both are store-and-forward:  routers: network-layer devices (examine network- layer headers)  switches: link-layer devices (examine link-layer headers) both have forwarding tables:  routers: compute tables using routing algorithms, IP addresses  switches/


5: DataLink Layer5-1 Chapter 5 Link Layer and LANs Computer Networking: A Top Down Approach 4 th edition. Jim Kurose, Keith Ross Addison-Wesley, July 2007.

from IP address! r reliable delivery between adjacent nodes m we learned how to do this already (chapter 3)! m seldom used on low bit-error link (fiber, some twisted pair) m wireless links: high error/5: DataLink Layer5-84 Switches vs. Routers r both store-and-forward devices m routers: network layer devices (examine network layer headers) m switches are link layer devices r routers maintain routing tables, implement routing algorithms r switches maintain switch tables, implement filtering, learning/


Switching vs Routing Presentation Julia Vuong and Travis Anderson.

from Switching and Routing device configuration and implementation. Switching vs Routing Foundation Switching Switching moves traffic from an input interface to one or more output interfaces. Switching is optimized and has lower latency than routing because it/ length. Cisco Express Forwarding Functionality Functional Description Cisco Express Forwarding (CEF) is advanced Layer 3 IP switching technology. CEF optimizes network performance and scalability for networks with large and dynamic traffic patterns/


CSci5221: Introduction to SDN1 Introduction to Software-Defined Networking Overview –What is SDN and Why SDN? SDN Control Plane Abstractions OpenFlow Switch.

Switching Controller server Hardware Layer Software Layer OpenFlow Table MAC src MAC dst IP Src IP Dst TCP sport TCP dport Action OpenFlow Client **5.6.7.8***port 1 port 4port 3 port 2 port 1 1.2.3.45.6.7.8 1. Separate Control from Datapath SDN Controller: Making Control Plane Decisions, e.g., routing/ of 10s of events per second for a network of thousands of hosts  Scaling? network view vs. per-flow vs. per-packet states?  Time scales (in conventional networks) 75 Programmatic Interface  Event-based: /


Chapter 5 The Network Layer Computer Networks. Network Layer Chapter 5 CN5E by Tanenbaum & Wetherall, © Pearson Education-Prentice Hall and D. Wetherall,

routing » Link state routing » Hierarchical routing » Broadcast routing » Multicast routing » Anycast routing » Routing for mobile hosts » Routing in ad hoc networks » Virtual-circuits vs. Datagram Networks Several trade offs exist: 1.Set up time vs. address parsing time Virtual circuits require set up time and consume resources, then routing/2 3 3 3 /Switching and MPLS » OSPF—An Interior Gateway Routing Protocol » BGP—The Exterior Gateway Routing Protocol » Internet Multicasting » Mobile IP » Network Layer/


Network Layer4-1 Reti di calcolatori e Sicurezza -- Network Layer --- Part of these slides are adapted from the slides of the book: Computer Networking:

network from source to dest. Routing protocol A E D CB F 2 2 1 3 1 1 2 5 3 5 r “good” path: m typically means minimum cost path m other def’s possible Network Layer4-15 Caratteristiche del routing r Switching vs Routing m Switching: attività che seleziona una/,000 simultaneous connections with a single LAN-side address! r NAT is controversial: m routers should only process up to layer 3 m violates end-to-end argument NAT possibility must be taken into account by app designers, eg, P2P applications m address/


1 CSCD 330 Network Programming Winter 2016 Lecture 13 Network Layer Reading: Chapter 4 Some slides provided courtesy of J.F Kurose and K.W. Ross, All Rights.

1 2 3 0111 value in arriving packet’s header routing algorithm local forwarding table header value output link 0100 0101 0111 1001 32213221 Interplay between Routing and Forwarding All routers have routing tables Specify next hop in route Create Routing Table Built by routing algorithms 16 IP Datagram Delivery IP View at Data link Layer Internetwork collection of LANs or point-to-point links or switched networks that/


Tutorial on Network Layers 2 and 3

are the way they are Outline layer 2 issues: addresses, multiplexing, bridges, spanning tree algorithm layer 3: addresses, neighbor discovery, connectionless vs connection-oriented Routing protocols Distance vector Link state Path vector Why this whole layer 2/3 thing? Myth: bridges/switches simpler devices, designed before routers OSI Layers 1: physical Why this whole layer 2/3 thing? Myth: bridges/switches simpler devices, designed before routers OSI Layers 1: physical 2: data link/


Part 2 Logical Network Design

and IPv6 to IPv4 Interactions Enhancements available with IPv6: Mobility and security Simpler header Address formatting Graphic: 6.3.1.2 Summary Use a systematic, structured, top-down approach to addressing and naming Assign addresses in a / Station A5 Station A6 VLAN B VLAN A Routing vs. Bridging and Switching Routing is operating at the Network Layer of the OSI Model. Bridging and switching occur on the Data Link Layer. Selecting Routing Protocols A routing protocol lets a router dynamically learn how to /


Www.planet.com.tw WGS3-5220 48-Port 10/100Mbps with 4G TP/SFP Layer 3 Managed Switch Copyright © PLANET Technology Corporation. All rights reserved.

Routing Management – VRRP – IRDP www.planet.com.tw 6 / 24 Key Benefits - Layer 2 vs. Layer 3  Standard Layer 2 Switch Packets forward by MAC address Broadcast Flooding, Virus Infect, low security www.planet.com.tw 7 / 24 Key Benefits - Layer 2 vs. Layer 3Layer 2 Switch with VLAN function Packets forward by MAC address and VLAN Broadcast Flooding and Virus infect be limited, Higher security www.planet.com.tw 8 / 24  Layer 3 Switch/


Implementing Inter-VLAN Routing

port per VLAN or subnet only Useful for point-to-point Layer 3 switch links Configuration of a Routed Interface Enable IP routing. Disable Layer 2 processing on interface. Configure IP address. Layer 2 EtherChannel vs. Layer 3 EtherChannel Layer 2 EtherChannel bundles access or trunk ports between switches or other devices (e.g., servers). Layer 3 EtherChannel bundles routed ports between switches. Configuration of Layer 3 EtherChannel The no switchport command is applied both on the physical/


IP technology, part 2 1) Mobility aspects (terminal vs. personal mobility) 2) GPRS (IP traffic in mobile network) 3) Session Initiation Protocol (SIP)

IMS (IP Multimedia Subsystem) concept in 3GPP Release 5 also tries to combine both (using SIP and GPRS technology). User mobility vs. terminal mobility Personal mobility (e.g. offered by SIP): User can move around in the network and use a new / (VCI and VPI) located in the cell headers Cell routing (switching and/or relaying) within the ATM network (also using VCI and VPI) The ATM layer may also provide mechanisms for traffic management. 1. 2. 3. 4. Bits Byte in header ATM cell header structure 87654321/


CISSP Common Body of Knowledge Review by Alfred Ouyang is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

security issues associated with the use of dynamic routing protocols? – Integrity of routing tables – Operational stability What is the difference /switch ports connnected to 5 and 6? – Provision a port span - 66 - 12 3 4 5 6 - 67 - Topics Telecommunications & Network Security Domain – Part 2 Security Countermeasures and Controls –Physical Layer –Data-Link Layer –IP Network Layer –Transport Layer –Application Layer VPN NAS - 68 - Security Countermeasures & Controls Security of Application Layers – S-HTTP vs/


3.3 Cell Switching (ATM) Asynchronous Transfer Mode (ATM)

token, and thus determines how long a station might have to wait for the token to reach it fixed-length packets packet vs. cell it is easier to build hardware to do simple jobs, and the job of processing packets is simpler when you/Connection Identifiers Virtual Connection Identifiers in UNIs and NNIs ATM Cell Routing with a Switch 3.3.4 Physical Layers for ATM In the ATM standard, it is assumed that ATM would run on top of a SONET physical layer many ATM-over-SONET products Actually, these two are entirely /


Contents General Competitive and Positioning highlights

H3C S7503,S7506,S7506R No Limitation Salience III Full Layer 2/3/5 OSPF/ BGP/IS-IS/Policy Routing 384Gbps/198Mpps Salience III Plus Full Layer 2/3/6 OSPF/ BGP/IS-IS/Policy Routing 768Gbps/432Mpps Quick Competitive Replacement Guides S7503 Vs C 4503 H3C- Salience III Edge-96G S7503 Cisco Catalyst 4503 w/S II plus Switch Fabric Performance 96Gbps/71Mpps 64Gbps/48Mpps Backplane Bandwidth 840Gbps/


5: DataLink Layer5a-1 Chapter 5 Data Link Layer Computer Networking: A Top Down Approach Featuring the Internet, 2 nd edition. Jim Kurose, Keith Ross Addison-Wesley,

until channel idle and then transmits 3. If adapter transmits entire frame /vs. Routers r both store-and-forward devices m routers: network layer devices (examine network layer headers) m bridges are link layer devices r routers maintain routing tables, implement routing/layer: only at edge of ATM network m data segmentation/reassembly m roughly analagous to Internet transport layer r ATM layer: “network” layer m cell switching, routing r Physical layer 5: DataLink Layer5a-102 ATM: network or link layer/


Network Layer 4-1 Chapter 4: Network Layer Chapter goals:  understand principles behind network layer services:  network layer service models  forwarding.

packet time later: green packet experiences HOL blocking switch fabric switch fabric Network Layer 4-33 Chapter 4: Network Layer  4. 1 Introduction  4.2 Virtual circuit and datagram networks  4.3 What’s inside a router  4.4 IP: Internet Protocol  Datagram format  IPv4 addressing  ICMP  IPv6  4.5 Routing algorithms  Link state  Distance Vector  Hierarchical routing  4.6 Routing in the Internet  RIP  OSPF  BGP  4/


Comp 361, Fall 20035: DataLink Layer 1 Chapter 5: The Data Link Layer last revised 24/11/03 Our goals: r understand principles behind data link layer services:

until channel idle and then transmits 3. If adapter transmits entire frame /vs. Bridges Routers + and - + arbitrary topologies can be supported, cycling is limited by TTL counters (and good routing protocols) + provide protection against broadcast storms - require IP address configuration (not plug and play) - require higher packet processing r bridges do well in small (few hundred hosts) while routers used in large networks (thousands of hosts) Comp 361, Fall 20035: DataLink Layer 85 Ethernet Switches/


Shivkumar Kalyanaraman 1 Routing I: Basic Ideas Shivkumar Kalyanaraman Rensselaer Polytechnic Institute Based in part upon slides.

Routing vs Forwarding  Forwarding table vs Forwarding in simple topologies  Routers vs Bridges: review  Routing Problem  Telephony vs Internet Routing  Source-based vs Fully distributed Routing  Distance vector vs Link state routing  Addressing and Routing: Scalability Where are we? Shivkumar Kalyanaraman 24 Detour: Telephony routing q Circuit-setup is what is routed. Voice then follows route, and claims reserved resources.  3-level hierarchy, with a fully-connected core  AT&T: 135 core switches/


Shivkumar Kalyanaraman Rensselaer Polytechnic Institute 1 ECSE-6660 Availability, Survivability, Protection/Restoration, Fast Re- Route

I.e. ½ the capacity is used for protection purposes in each fiber q Span switching and ring switching is possible only in BLSR, not in UPSR q 1:n and m:n /vs Ring/Linear Protection Extracted from: T-H. Wu, Emerging Technologies for Fiber Network Survivability, See References Shivkumar Kalyanaraman Rensselaer Polytechnic Institute 47 Fast Reroute q Do the “restoration” at the MPLS (I.e. Layer 2) … q Also possible to do fast-reroute at layer 3 (IP) with BANANAS framework. q Issues: q Can MPLS re-route/


Spring 20071 Routing & Switching Umar Kalim Dept. of Communication Systems Engineering 20/03/2007.

3 0 1 2 3 0 13 0 1 2 3 Host A Host B Switch 3 Switch 2Switch 1 7 5 4 11 Spring 20075 Datagram Switching No connection setup phase Each packet forwarded independently Sometimes called connectionless model Analogy: postal system Each switch maintains a forwarding (routing) table Spring 20076 Forwarding Tables: VC vs/ Study for Reference Spring 200714 Datagram Networks: the Internet model no call setup at network layer routers: no state about end-to-end connections –no network-level concept of “connection”/


Mod 10 – Routing Protocols

routed through a network based on the destination address contained within each packet. Switching Switching Circuit Switched (connection-oriented) Dial-up Circuits POTS ISDN Leased Lines T1, T3, OC3, OC48 Packet Switched (connectionless) Original Packet Switching X.25 Faster Packet Switching/, but relies on the transport layer for reliability Routed Protocols vs. Routing Protocols Routed Protocol IP is a routed protocol A routed protocol is a layer 3 protocol that contains network addressing information/


ECE544: Communication Networks-II, Spring 2009 H. Liu Lecture 3 Includes teaching materials from D. Raychaudhuri, J. Kurose, and ATM Forum tutorials.

each output port Switch Implementation (3) Self-routing: e.g. banyan switch –“self-routing header” appended to the packet by the input port –Switch fabric route the packet to its output port based on the “self- routing header” –“self-routing header” removed at the output port Input Port Output Port Switch fabric Original Packet header Self-routing header IP over ATM Classic IP –Layer 3 “networks” –connect LANs –MAC (802.3) and IP addresses/


Introduction to Networking. 2 Goals for Today Review –Layered Architecture –ISO and Internet Protocols Addressing Routing Circuit vs Packet Switching.

Introduction to Networking 2 Goals for Today Review –Layered Architecture –ISO and Internet Protocols Addressing Routing Circuit vs Packet Switching 3 Communication Structure Naming and name resolution - How do two processes locate each other to communicate? Routing strategies - How are messages sent through the network? Connection strategies - How do two processes send a sequence of messages? Contention - The network is a shared resource, so how do we/


Chapter 5 Link Layer Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley March 2012 All material copyright 1996-2012.

, S 3, S 4 A B S1S1 C D E F S2S2 S4S4 S3S3 H I G Link Layer5-74 Institutional network to external network router IP subnet mail server web server Link Layer5-75 Switches vs. routers both are store-and-forward:  routers: network-layer devices (examine network- layer headers)  switches: link-layer devices (examine link-layer headers) both have forwarding tables:  routers: compute tables using routing algorithms/


Chapter 4 Circuit-Switching Networks

Haul Network Chapter 4 Circuit-Switching Networks SONET SONET: Overview Synchronous Optical NETwork North American TDM physical layer standard for optical fiber /Routing Scenario High-usage route B-E Tandem switch 1 Alternative routes for B-E, C-F High-usage route C-F Switch B Switch C Switch E Switch D Switch F Tandem switch 2 Switch A Dynamic Routing Traffic varies according to time of day, day of week High-usage route Alternative routes Switch A Switch B Tandem switch 3 Tandem switch 1 Tandem switch/


DAP Spr.‘98 ©UCB 1 Lecture 16: Networks & Interconnect (Routing, Examples, Protocols) + Intro to Parallel Processing Professor David A. Patterson Computer.

vs. Cut-Through Store-and-forward policy: each switch waits for the full packet to arrive in switch before sending to the next switch (good for WAN) Cut-through routing or worm hole routing: switch/ reliable communications without reliable networks –Hierarchy of SW layers, giving each layer responsibility for portion of overall communications task, called protocol/ on Intel Paragon with 128 processors (1994) –(see Chapter 1, Figure 1-3, page 27 of Culler, Sighn, Gupta [CSG97]) –Classic MPP slide: processors/


1 Quality of Service vs. Any Service at All IWQoS 2005 Passau Germany Randy H. Katz Computer Science Division Electrical Engineering and Computer Science.

vs. Any Service at All IWQoS 2005 Passau Germany Randy H. Katz Computer Science Division Electrical Engineering and Computer Science Department University of California, Berkeley Berkeley, CA 94720-1776 2 Presentation Outline The Problem System and Network Trends Checking-Observing-Protecting Services Inspection-and-Action Boxes Annotation Layer Scenario Call to Action 3/-Network is real –Networking plus processing in switched and routed infrastructures –Configuration and management of packet processing cast/


5: DataLink Layer5-1 Chapter 5: DataLink Layer Course on Computer Communication and Networks, CTH/GU The slides are adaptation of the slides made available.

idle r example: 6-station LAN, 1,3,4 have pkt, frequency bands 2,5/switch collision domain 5: DataLink Layer5-63 Switches vs. Routers r both store-and-forward devices m routers: network layer devices (examine network layer headers) m Switches (bridges) are Link Layer devices r routers maintain routing tables, implement routing algorithms r switches maintain filtering tables, implement filtering, learning (and spanning tree) algorithms Switch 5: DataLink Layer5-64 Routers vs. Bridges/Switches Bridges/Switches/


Chapter 5: The Data Link Layer r Application r Transport r Network r data link layer service m Moving data between nearby network elements Move data between.

B Have a table entry for A, so forward Self-Learning MACInterface 1 2 3 1 2 3 2 1 3 2 3 1 MACInterface MACInterface MACInterface A B 20 minutes later, all table entries are deleted Poorly/Switches vs. Routers r both store-and-forward devices m routers: network layer devices (examine network layer headers) m switches are link layer devices r routers maintain routing tables, implement routing algorithms r switches maintain switch tables, implement filtering, learning algorithms Summary comparison Link Layer/


Routing Paradigms CS 552 Richard P. Martin. 3 Addressing Strategies Where to send data? –To a node in the network? –To a physical place or along a physical.

.org/doc/worse-is-better.html What happened to billing and security? Switching Observe totally different way to perform routing (circuit switching) from basic packet switching SS7 is the classic PSTN network –“Alphabet soup” of networking elements /sub network (Tivoli, Linda, T-Spaces) If placed in routing layer, how to get efficient node-centric routing? –Simple way if first bullet is solved though Right layer? –Networking vs. application. Routing Summary Can we change the internet? –Stuck with current /


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