Tuesday, October 21st - University of Pittsburgh
... may occur at input queues Head-of-the-Line (HOL) blocking: queued datagram at front of queue prevents others in queue from ...
... may occur at input queues Head-of-the-Line (HOL) blocking: queued datagram at front of queue prevents others in queue from ...
COS 461: Computer Networks Spring 2009 (MW 1:30‐2:50 in CS 105) Mike Freedman Teaching Assistants: WyaI Lloyd and Jeff Terrace
... – Talk to me about a project before spring break ...
... – Talk to me about a project before spring break ...
Chapter 2 Protocols and TCP/IP
... A primitive issued by a service provider either to: indicate that a procedure has been invoked by the peer service user on the connection and to provide the associated parameters, or notify the service user of a provider-initiated action ...
... A primitive issued by a service provider either to: indicate that a procedure has been invoked by the peer service user on the connection and to provide the associated parameters, or notify the service user of a provider-initiated action ...
Week 5
... dest. network unreachable dest host unreachable dest protocol unreachable dest port unreachable dest network unknown dest host unknown source quench (congestion control - not used) ...
... dest. network unreachable dest host unreachable dest protocol unreachable dest port unreachable dest network unknown dest host unknown source quench (congestion control - not used) ...
presentation source
... GARR-B High-bandwidth infrastructure (34-155M) based on ATM VPs (CBR), with high-speed links to European research network and the Internet 15 PoP throughout Italy - the PoPs are in the Telecom premises, but the network is managed by the GARR consortium (practically speaking, at the moment, by ...
... GARR-B High-bandwidth infrastructure (34-155M) based on ATM VPs (CBR), with high-speed links to European research network and the Internet 15 PoP throughout Italy - the PoPs are in the Telecom premises, but the network is managed by the GARR consortium (practically speaking, at the moment, by ...
Shortest Path Bridging IEEE 802.1aq Overview
... evolution of the various spanning tree protocols. 802.1aq allows for true shortest path routing, multiple equal cost paths, much larger layer 2 topologies, faster convergence, vastly improved use of the mesh topology, single point provisioning for logical membership (E-LINE/E-LAN/E-TREE etc), abstra ...
... evolution of the various spanning tree protocols. 802.1aq allows for true shortest path routing, multiple equal cost paths, much larger layer 2 topologies, faster convergence, vastly improved use of the mesh topology, single point provisioning for logical membership (E-LINE/E-LAN/E-TREE etc), abstra ...
PART III OPS-based wide area networks
... In this thesis we focus on a connection-oriented OPS network scenario taking into account both static and dynamic approach. We address two problems, namely the problem of setting up of the OVC, properly configuring the forwarding table at the nodes, and the problem of providing QoS. Concerning the fo ...
... In this thesis we focus on a connection-oriented OPS network scenario taking into account both static and dynamic approach. We address two problems, namely the problem of setting up of the OVC, properly configuring the forwarding table at the nodes, and the problem of providing QoS. Concerning the fo ...
View
... – destination-based routing: not pair-based!
– multiple shortest paths (“equal-cost” paths, ECPs) may
exist and can be used for load-balancing
• But typical equal splitting is used to split traffic among ECPs
for a given destination prefix
• On the other hand, multiple destination prefixe ...
... – destination-based routing: not
Chapter 12 Exterior Routing Protocols and Multicasting
... • Router does not need to know every host in a group — Needs to know at least one group member still active — Each host in group sets timer with random delay — Host that hears another claim membership cancels own report — If timer expires, host sends report — Only one member of each group reports to ...
... • Router does not need to know every host in a group — Needs to know at least one group member still active — Each host in group sets timer with random delay — Host that hears another claim membership cancels own report — If timer expires, host sends report — Only one member of each group reports to ...
Lecture 8
... Addresses and Interfaces • Each host that is attached to the same network has the same “network” part of the IP address. • If routers are attached to multiple networks then, they need to have an address for each network. – Address assigned to the interface on the network. ...
... Addresses and Interfaces • Each host that is attached to the same network has the same “network” part of the IP address. • If routers are attached to multiple networks then, they need to have an address for each network. – Address assigned to the interface on the network. ...
![[RIP] - School of Computing](http://s1.studyres.com/store/data/008734696_1-cf06dba4c0ce902042221af117bfaa99-300x300.png)
[RIP] - School of Computing
... If the networks are not adjacent then the path will be through several routers. ...
... If the networks are not adjacent then the path will be through several routers. ...
unit7 - WCU Computer Science
... • Increased addressing flexibility – Anycast - delivered to one of a set of nodes – Improved scalability of multicast addresses ...
... • Increased addressing flexibility – Anycast - delivered to one of a set of nodes – Improved scalability of multicast addresses ...
Sem 2 Chapter 9
... A router learns paths, also called routes, from an administrator's configuration or from other routers by way of routing protocols. Routers store this routing information in routing tables using on-board dynamic random access memory (DRAM). A routing table contains a list of the best available route ...
... A router learns paths, also called routes, from an administrator's configuration or from other routers by way of routing protocols. Routers store this routing information in routing tables using on-board dynamic random access memory (DRAM). A routing table contains a list of the best available route ...
Internet Architecture
... potential congestion: packet delay and high loss • protocols needed for reliable data transfer, congestion control • it is possible to guarantee quality of service (QoS) in packet-switched networks and still gain statistical multiplexig, but it adds much complexity packet header overhead per p ...
... potential congestion: packet delay and high loss • protocols needed for reliable data transfer, congestion control • it is possible to guarantee quality of service (QoS) in packet-switched networks and still gain statistical multiplexig, but it adds much complexity packet header overhead per p ...
l3-cpe/l2-cpe
... Less critical traffic can use a “loose” path calculated by a routing protocol (OSPF/ISIS) RSVP-TE will allow to ensure bandwidth availability along a path for critical traffic Carrier Ethernet has no concept of traffic engineering (besides static provisioning) IP/MPLS can attempt to find an alternat ...
... Less critical traffic can use a “loose” path calculated by a routing protocol (OSPF/ISIS) RSVP-TE will allow to ensure bandwidth availability along a path for critical traffic Carrier Ethernet has no concept of traffic engineering (besides static provisioning) IP/MPLS can attempt to find an alternat ...
Integrating Cisco Press Resources into the Academy Classroom
... Step 1 Get two routers, each with a serial interface. Step 2 For one router, use a serial DTE cable. The connector on one end of the cable should be connected to one of the router’s serial interfaces. Step 3 For the other router, use a serial DCE cable. The connector on one end of the cable should c ...
... Step 1 Get two routers, each with a serial interface. Step 2 For one router, use a serial DTE cable. The connector on one end of the cable should be connected to one of the router’s serial interfaces. Step 3 For the other router, use a serial DCE cable. The connector on one end of the cable should c ...
Document
... • Flow control: using backpressure to regulate the flow. • Buffer allocation: used with virtual circuit (connection-oriented) networks. Buffer size is considered a credit-based technique. • Choke packets ...
... • Flow control: using backpressure to regulate the flow. • Buffer allocation: used with virtual circuit (connection-oriented) networks. Buffer size is considered a credit-based technique. • Choke packets ...
ppt
... Video server needs to register with the nearest “Overlay Broker” before starting a video session. Synergy Layer is created on top of the IP layer and deployed in every router in various domains to provide feedback. Link failure info (e.g. IP addr of failed node) is passed to the server through the o ...
... Video server needs to register with the nearest “Overlay Broker” before starting a video session. Synergy Layer is created on top of the IP layer and deployed in every router in various domains to provide feedback. Link failure info (e.g. IP addr of failed node) is passed to the server through the o ...
lecture9
... Accomplished via “link state broadcast” All nodes have same info Computes least cost paths from one node (‘source”) to all other nodes, using Dijkstra’s Algorithm Gives forwarding table for that node ...
... Accomplished via “link state broadcast” All nodes have same info Computes least cost paths from one node (‘source”) to all other nodes, using Dijkstra’s Algorithm Gives forwarding table for that node ...
Wi-SUN presentation
... Protocol layers – Adaptation Layer : 6LoWPAN • IPv6 header compression • UDP header compression • Fragmentation • Neighbour discovery • Routing support – Network layer • IPv6 • DHCPv6 address management LPWAN@IETF97 ...
... Protocol layers – Adaptation Layer : 6LoWPAN • IPv6 header compression • UDP header compression • Fragmentation • Neighbour discovery • Routing support – Network layer • IPv6 • DHCPv6 address management LPWAN@IETF97 ...
module05-datalinkV2
... • Link management: The link control protocol (LCP) is responsible for establishing, configuring, and negotiating a data-link connection. LCP also monitors the link quality and is used to terminate the link. • Authentication: Authentication is optional. PPP supports two ...
... • Link management: The link control protocol (LCP) is responsible for establishing, configuring, and negotiating a data-link connection. LCP also monitors the link quality and is used to terminate the link. • Authentication: Authentication is optional. PPP supports two ...
Study of Geographic Routing Protocols for MANETs
... BGP- Broader Gateway Protocol Why BGP fails in MANETs ? Path vector protocol Assumptions Internal Gateway Detection Internal Network Knowledge The above assumptions do not hold true for MANETs using reactive/hybrid routing protocols. IP prefix aggregation BGP Aggregates IP addresses i ...
... BGP- Broader Gateway Protocol Why BGP fails in MANETs ? Path vector protocol Assumptions Internal Gateway Detection Internal Network Knowledge The above assumptions do not hold true for MANETs using reactive/hybrid routing protocols. IP prefix aggregation BGP Aggregates IP addresses i ...
Semester 1 Chapter 11 - Institute of Technology Sligo
... might be "determination of optimum path", because this Interior Gateway Protocol actually uses several criteria to determine the best route to a destination. These criteria include cost metrics, which factor in such things as route speed, traffic, reliability, and ...
... might be "determination of optimum path", because this Interior Gateway Protocol actually uses several criteria to determine the best route to a destination. These criteria include cost metrics, which factor in such things as route speed, traffic, reliability, and ...