History of the Internet
... the computer research program at the Department of Defense's Advanced Research Projects Agency in 1966 when he hit upon the idea of lining computers together. He was awarded $1 Million to develop the network. Larry Roberts, a pioneer in computer networking at MIT's Lincoln Laboratory. He designed th ...
... the computer research program at the Department of Defense's Advanced Research Projects Agency in 1966 when he hit upon the idea of lining computers together. He was awarded $1 Million to develop the network. Larry Roberts, a pioneer in computer networking at MIT's Lincoln Laboratory. He designed th ...
netLyr-address
... • Devices that determine paths or routes are usually called routers • Routers must have tables entries, called a routing table, for every network in order to ...
... • Devices that determine paths or routes are usually called routers • Routers must have tables entries, called a routing table, for every network in order to ...
Resilient Overlay Networks - Networks and Mobile Systems
... Inability to detect badly performing paths Inability to efficiently leverage redundant paths Inability to perform application-specific routing Inability to express sophisticated routing policy ...
... Inability to detect badly performing paths Inability to efficiently leverage redundant paths Inability to perform application-specific routing Inability to express sophisticated routing policy ...
Lec02c-Interconnection Networks Part 2
... of the destination processor. • The data traverses the link to the first switching node. If the most significant bits of s and d are the same, then the data is routed in pass-through mode by the switch else, it switches to crossover. • This process is repeated for each of the log p switching stages. ...
... of the destination processor. • The data traverses the link to the first switching node. If the most significant bits of s and d are the same, then the data is routed in pass-through mode by the switch else, it switches to crossover. • This process is repeated for each of the log p switching stages. ...
Internet Protocol, IP Addressing and Datagrams
... – suffix: a host attached to a given physical network, also known as host number ...
... – suffix: a host attached to a given physical network, also known as host number ...
223.1.1.4
... •A, E not directly attached •routing table: next hop router to E is 223.1.1.4 •link layer sends datagram to router 223.1.1.4 inside link-layer frame •datagram arrives at 223.1.1.4 ...
... •A, E not directly attached •routing table: next hop router to E is 223.1.1.4 •link layer sends datagram to router 223.1.1.4 inside link-layer frame •datagram arrives at 223.1.1.4 ...
COS 217, Spring 2005 - Princeton University
... • Service providers: Offer end-to-end services (e.g., layer 3 VPNs, SLAs, etc.) to users Today: ISPs try to play both roles, and cannot offer end-to-end services ...
... • Service providers: Offer end-to-end services (e.g., layer 3 VPNs, SLAs, etc.) to users Today: ISPs try to play both roles, and cannot offer end-to-end services ...
Week 6
... • A advertises to B the path AW • B advertises to X the path BAW • Should B advertise to C the path BAW? – No way! B gets no “revenue” for routing CBAW since neither W nor C are B’s customers – B wants to force C to route to w via A – B wants to route only to/from its customers! ...
... • A advertises to B the path AW • B advertises to X the path BAW • Should B advertise to C the path BAW? – No way! B gets no “revenue” for routing CBAW since neither W nor C are B’s customers – B wants to force C to route to w via A – B wants to route only to/from its customers! ...
QoS Support in 802.11 Wireless LANs
... • It was hard to wait for network equipment manufacturers to integrate these routing/signaling/LMP into their NEs • It was much easier for us to go off on our own and build NMS software external to switches • But now, we are there. The equipment vendors do have such NEs. Let’s use them. ...
... • It was hard to wait for network equipment manufacturers to integrate these routing/signaling/LMP into their NEs • It was much easier for us to go off on our own and build NMS software external to switches • But now, we are there. The equipment vendors do have such NEs. Let’s use them. ...
Traffic Monitoring using sFlow
... Since sFlow contains forwarding information, it can be used to profile the most active routes and the specific flows carried by these routes. Understanding the routes and flows makes it possible to optimize routing - improving connectivity and performance, and choosing the most cost effective peerin ...
... Since sFlow contains forwarding information, it can be used to profile the most active routes and the specific flows carried by these routes. Understanding the routes and flows makes it possible to optimize routing - improving connectivity and performance, and choosing the most cost effective peerin ...
Chapter 1. Introduction to Data Communications
... Reproduction or translation of this work beyond that named in Section 117 of the United States Copyright Act without the express written consent of the copyright owner is unlawful. Requests for further information should be addressed to the Permissions Department, John Wiley & Sons, Inc. Adopters of ...
... Reproduction or translation of this work beyond that named in Section 117 of the United States Copyright Act without the express written consent of the copyright owner is unlawful. Requests for further information should be addressed to the Permissions Department, John Wiley & Sons, Inc. Adopters of ...
ppt
... • Implementing a functionality at a lower level should have minimum performance impact on the applications that do not use the functionality ...
... • Implementing a functionality at a lower level should have minimum performance impact on the applications that do not use the functionality ...
Computer Science 461 Final Exam May 22, 2012 1:30-3:30pm
... checks its local ARP cache to determine the MAC address associated with the destination IP address. On a “miss” in the ARP cache, the sending host sends an ARP request for the destination IP address and buffers the packet, awaiting a response. Suppose, instead, the host issues the ARP request and si ...
... checks its local ARP cache to determine the MAC address associated with the destination IP address. On a “miss” in the ARP cache, the sending host sends an ARP request for the destination IP address and buffers the packet, awaiting a response. Suppose, instead, the host issues the ARP request and si ...
Final - Computer Science at Princeton University
... checks its local ARP cache to determine the MAC address associated with the destination IP address. On a “miss” in the ARP cache, the sending host sends an ARP request for the destination IP address and buffers the packet, awaiting a response. Suppose, instead, the host issues the ARP request and si ...
... checks its local ARP cache to determine the MAC address associated with the destination IP address. On a “miss” in the ARP cache, the sending host sends an ARP request for the destination IP address and buffers the packet, awaiting a response. Suppose, instead, the host issues the ARP request and si ...
UNIX for Programmers and Users
... segments of Ethernet cable (serial connection between two groups of computers) Routers: hooks together two or more networks and automatically routes messages to the proper network. Gateways: High capacity routers which connect Local Area Networks. These are placed geographically apart. (WAN) ...
... segments of Ethernet cable (serial connection between two groups of computers) Routers: hooks together two or more networks and automatically routes messages to the proper network. Gateways: High capacity routers which connect Local Area Networks. These are placed geographically apart. (WAN) ...
14-InternetRouting - Rose
... – each node has detailed area topology; only know direction (shortest path) to nets in other areas. ...
... – each node has detailed area topology; only know direction (shortest path) to nets in other areas. ...
CS4514 Course Objectives
... broadcast :: a single communications channel shared by all machines (addresses) on the network. Broadcast can be both a logical or a physical concept (e.g. Media Access ...
... broadcast :: a single communications channel shared by all machines (addresses) on the network. Broadcast can be both a logical or a physical concept (e.g. Media Access ...
layering
... Statistical Multiplexing (2) • Example: Users in an ISP network – Network has 100 Mbps (units of bandwidth) – Each user subscribes to 5 Mbps, for videos – But a user is active only 50% of the time … • How many users can the ISP support? – With dedicated bandwidth for each user: ...
... Statistical Multiplexing (2) • Example: Users in an ISP network – Network has 100 Mbps (units of bandwidth) – Each user subscribes to 5 Mbps, for videos – But a user is active only 50% of the time … • How many users can the ISP support? – With dedicated bandwidth for each user: ...
9/13/2010 Computer Network? The “nuts and bolts” view of the Internet
... ❍ The purpose of a layer is to offer services to the layer above it using a well-defined interface (programming language analogy: libraries hide details while providing a service) ❍ Reduces design complexity q Protocols: “horizontal” conversations at any ...
... ❍ The purpose of a layer is to offer services to the layer above it using a well-defined interface (programming language analogy: libraries hide details while providing a service) ❍ Reduces design complexity q Protocols: “horizontal” conversations at any ...
Chapter 2
... The Transmission Control Protocol (TCP) and the Internet Protocol (IP) are the two protocols that support the Internet operation. TCP controls the assembly of a message into smaller packets before it is transmitted over the Internet. The IP protocol includes rules for routing individual data packets ...
... The Transmission Control Protocol (TCP) and the Internet Protocol (IP) are the two protocols that support the Internet operation. TCP controls the assembly of a message into smaller packets before it is transmitted over the Internet. The IP protocol includes rules for routing individual data packets ...
Local Area Networks: Internetworking
... Circuit-switched: dedicated, physical circuit; all traffic follows this path; charged for duration of circuit. Packet-switched: not a dedicated, physical circuit; path may be shared by other users; data sent as packets; packets may follow different paths. 2. What are the main differences between con ...
... Circuit-switched: dedicated, physical circuit; all traffic follows this path; charged for duration of circuit. Packet-switched: not a dedicated, physical circuit; path may be shared by other users; data sent as packets; packets may follow different paths. 2. What are the main differences between con ...
Protcols for Highly-Dynamic Airborne Networks
... • Specifies node congestion (defers packets from being forwarded) ...
... • Specifies node congestion (defers packets from being forwarded) ...
CS 381 Introduction to computer networks
... • Later versions reduced the number of needles • Which reduced the number of wires connecting the telegraphs. • Reduction in needles/wires resulted in increased coding complexity ...
... • Later versions reduced the number of needles • Which reduced the number of wires connecting the telegraphs. • Reduction in needles/wires resulted in increased coding complexity ...
Network Technology and the Internet
... When you send a file or an e-mail message over a network, the file is actually broken up into small pieces called packets. A packet is a piece of data that is sent across a computer network. Packet Switching Technology determines how data is broken up so that it can be transported over a network. ...
... When you send a file or an e-mail message over a network, the file is actually broken up into small pieces called packets. A packet is a piece of data that is sent across a computer network. Packet Switching Technology determines how data is broken up so that it can be transported over a network. ...
Present
... ensure end-to-end services to the subscribers TDM based interconnection is simple and well defined Multiservice IP Based interconnection is complex Well defined regulatory framework to ensure effective interconnection among service providers is necessary to promote competition and reduce ...
... ensure end-to-end services to the subscribers TDM based interconnection is simple and well defined Multiservice IP Based interconnection is complex Well defined regulatory framework to ensure effective interconnection among service providers is necessary to promote competition and reduce ...