chapter1 - Computer Science Division
... network protocols: machines rather than humans all communication activity in Internet governed by protocols protocols define format, order of msgs sent and received among network entities, and actions taken on msg transmission, receipt ...
... network protocols: machines rather than humans all communication activity in Internet governed by protocols protocols define format, order of msgs sent and received among network entities, and actions taken on msg transmission, receipt ...
class15
... NAT: Network Address Translation Motivation: local network uses just one IP address as ...
... NAT: Network Address Translation Motivation: local network uses just one IP address as ...
Introduction
... transmission facility into a line that appears free of undetected transmission errors to the network layer. The DLL accomplishes this task by having the sender breaks up the input data into frames and transmit the frames sequentially. The receiver confirms correct receipt of each frame by sending ba ...
... transmission facility into a line that appears free of undetected transmission errors to the network layer. The DLL accomplishes this task by having the sender breaks up the input data into frames and transmit the frames sequentially. The receiver confirms correct receipt of each frame by sending ba ...
Unit 11
... – occurs when an application sends more data to a buffer than it can hold – can push the additional data into adjacent buffers, corrupting or overwriting existing data – can replace executable code in an application’s stack to alter its behavior • malicious code that will then be able to execute wit ...
... – occurs when an application sends more data to a buffer than it can hold – can push the additional data into adjacent buffers, corrupting or overwriting existing data – can replace executable code in an application’s stack to alter its behavior • malicious code that will then be able to execute wit ...
Limitations of Layer2 switching
... (a) A router with five packets queued for line O. (b) Finishing times for the five packets. ...
... (a) A router with five packets queued for line O. (b) Finishing times for the five packets. ...
Network Coding with Unreliable, Unknown Bandwidths.
... consider data manipulation and dissemination in networks • One important aspect of this is how to characterize the usefulness of nodes’ received information consisting of coded packets • We examine two main areas: – File dissemination among nodes in wireless multihop systems – Using network coding w ...
... consider data manipulation and dissemination in networks • One important aspect of this is how to characterize the usefulness of nodes’ received information consisting of coded packets • We examine two main areas: – File dissemination among nodes in wireless multihop systems – Using network coding w ...
Gateways: Historical Underpinnings of a Single Internet
... Parallel to the US efforts, the UK’s National Physics Laboratory (NPL), within the Department of Technology, began an experimental network in 1968 that went operational as a local area network two years later. According to Kirstein (2009), the network’s designers both realized the future importance ...
... Parallel to the US efforts, the UK’s National Physics Laboratory (NPL), within the Department of Technology, began an experimental network in 1968 that went operational as a local area network two years later. According to Kirstein (2009), the network’s designers both realized the future importance ...
1b.chapter1
... 9 de2-1.de1.de.geant.net (62.40.96.129) 109 ms 102 ms 104 ms 10 de.fr1.fr.geant.net (62.40.96.50) 113 ms 121 ms 114 ms 11 renater-gw.fr1.fr.geant.net (62.40.103.54) 112 ms 114 ms 112 ms ...
... 9 de2-1.de1.de.geant.net (62.40.96.129) 109 ms 102 ms 104 ms 10 de.fr1.fr.geant.net (62.40.96.50) 113 ms 121 ms 114 ms 11 renater-gw.fr1.fr.geant.net (62.40.103.54) 112 ms 114 ms 112 ms ...
Chapter1_5thed - Computer Science Division
... network protocols: machines rather than humans all communication activity in Internet governed by protocols protocols define format, order of msgs sent and received among network entities, and actions taken on msg transmission, receipt ...
... network protocols: machines rather than humans all communication activity in Internet governed by protocols protocols define format, order of msgs sent and received among network entities, and actions taken on msg transmission, receipt ...
Chapter1-Intro - Communications Systems Center (CSC)
... If you use these slides (e.g., in a class) in substantially unaltered form, that you mention their source (after all, we’d like people to use our book!) If you post any slides in substantially unaltered form on a www site, that you note that they are adapted from (or perhaps identical to) our sl ...
... If you use these slides (e.g., in a class) in substantially unaltered form, that you mention their source (after all, we’d like people to use our book!) If you post any slides in substantially unaltered form on a www site, that you note that they are adapted from (or perhaps identical to) our sl ...
view presentation
... SDLC is the process of developing information systems through investigation, analysis, design, implementation and maintenance. SDLC is also known as information systems development or application development. SDLC is a systems approach to problem solving and is made up of several phases, each compri ...
... SDLC is the process of developing information systems through investigation, analysis, design, implementation and maintenance. SDLC is also known as information systems development or application development. SDLC is a systems approach to problem solving and is made up of several phases, each compri ...
PART III OPS-based wide area networks
... Another example of how out-of-sequence packets may affect application performance is the case of delay-sensitive UDP-based traffic, such as real-time traffic. In fact unordered packets may arrive too late and/or the delay required to reorder several out-of-sequence packets may be too high with respect to ...
... Another example of how out-of-sequence packets may affect application performance is the case of delay-sensitive UDP-based traffic, such as real-time traffic. In fact unordered packets may arrive too late and/or the delay required to reorder several out-of-sequence packets may be too high with respect to ...
ppt - Carnegie Mellon School of Computer Science
... Lose state information for an entity if (and only if?) the entity itself is lost. Examples: » OK to lose TCP state if one endpoint crashes – NOT okay to lose if an intermediate router reboots » Is this still true in today’s network? – NATs and firewalls ...
... Lose state information for an entity if (and only if?) the entity itself is lost. Examples: » OK to lose TCP state if one endpoint crashes – NOT okay to lose if an intermediate router reboots » Is this still true in today’s network? – NATs and firewalls ...
SCORE: A Scalable Architecture for Implementing Resource
... • Manage and periodically update routing tables, stored at each router • Autonomous collection of routers: •Under single administration •Use same routing protocol: Interior Gateway Protocol (IGP) •Use Exterior Gateway Protocol (EGP) to communicate other systems • Router : “which way” to send the pac ...
... • Manage and periodically update routing tables, stored at each router • Autonomous collection of routers: •Under single administration •Use same routing protocol: Interior Gateway Protocol (IGP) •Use Exterior Gateway Protocol (EGP) to communicate other systems • Router : “which way” to send the pac ...
OVERVIEW
... Allows you to exchange information with remote office locations with the same security and reliability as your on-network communications. Allows every off-network site connected to the VPN to see the resources of other connected sites, just as though they were wired to a single physical network. S ...
... Allows you to exchange information with remote office locations with the same security and reliability as your on-network communications. Allows every off-network site connected to the VPN to see the resources of other connected sites, just as though they were wired to a single physical network. S ...
D E A L I N G W... J A C K S — S W I T...
... sticky learned port security turned on, or unicast flooding disabled. This could be easily ‘‘overlooked’’ by people performing maintenance on the switch. Our campus uses SNMP monitoring systems as well as regular review by paranoid individuals to ensure that this risk is minimized to an acceptable l ...
... sticky learned port security turned on, or unicast flooding disabled. This could be easily ‘‘overlooked’’ by people performing maintenance on the switch. Our campus uses SNMP monitoring systems as well as regular review by paranoid individuals to ensure that this risk is minimized to an acceptable l ...
ppt
... router will forward packet to a router on the next network over and so on… until packet arrives at router on same network as destination; then, router sends packet directly to destination host Requirements every host needs to know IP address of the router on its LAN every router needs a ro ...
... router will forward packet to a router on the next network over and so on… until packet arrives at router on same network as destination; then, router sends packet directly to destination host Requirements every host needs to know IP address of the router on its LAN every router needs a ro ...
Malicious Threats of Peer-to-Peer Networking
... Since peer-to-peer malicious threats still need to reside on the system’s current desktop, a scanning infrastructure can provide protection against infection. However, desktop protection may not prove to be the best method in the future. Should peer-to-peer networking become standard in home and cor ...
... Since peer-to-peer malicious threats still need to reside on the system’s current desktop, a scanning infrastructure can provide protection against infection. However, desktop protection may not prove to be the best method in the future. Should peer-to-peer networking become standard in home and cor ...
Computer Communications Network Design
... is typical of most small / medium business networks. For very small businesses, which may not want to invest in a special server just for these tasks, a router which includes DHCP functionality can be purchased but it must be able to handle multiple subnets (most off-the-shelf Internet routers only ...
... is typical of most small / medium business networks. For very small businesses, which may not want to invest in a special server just for these tasks, a router which includes DHCP functionality can be purchased but it must be able to handle multiple subnets (most off-the-shelf Internet routers only ...
Book cover slide
... frame A format that Ethernet networks use for transmitting data packets. The frame contains the preamble, source and destination addresses, data, type of protocol used to send the frame, and the CRC. (p. 139) ...
... frame A format that Ethernet networks use for transmitting data packets. The frame contains the preamble, source and destination addresses, data, type of protocol used to send the frame, and the CRC. (p. 139) ...