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A Wireless Intrusion Detection System and a new
A Wireless Intrusion Detection System and a new

... This training process is stored as an initial event list #1 in the source node. Receivers receive the packets which contain the timestamp and send appropriate ACK replies. Receivers store the received packets in their event list. ...
Chapter 02 - Communicating Over The Network
Chapter 02 - Communicating Over The Network

... size of PDU that each medium can transport Maximum Transmission Unit (MTU). Part of the control communication between the Data Link layer and the Network layer is the establishment of a maximum size for the packet. The Data Link layer passes the MTU upward to the Network layer. The Network layer the ...
Trojan Horse - Communications Systems Center
Trojan Horse - Communications Systems Center

... Look under keyboard, telephone etc. Look in the Rolodex under “X” and “Z” Call up pretending to from “micro-support,” and ask for it. “Snoop” a network and watch the plaintext passwords go by. Tap a phone line - but this requires a very special modem. Use a “Trojan Horse” program or “key catcher”to ...
Stephanie Kinsella
Stephanie Kinsella

... Each node in a sensor network may be comprised of one or more sensors, a low power radio, portable power supply, and possibly a Global Positioning System. The most important feature of networks such as these, is that their nodes are unattended and have limited and non-replenishable energy sources, w ...
The Internet in Perspective
The Internet in Perspective

... A Data Network • Switches Packets, not circuits • Each packet may be independently forwarded, delayed or dropped by each router • Each packet is independently switched to its addressed destination • There is no time synchronization between sender and receiver ...
pSHIELD STS DEMO Poster
pSHIELD STS DEMO Poster

... and digitally signing packets, produce a fixed latency (about 4 seconds) in returning the first results to the wrapper for each executed query this can certainly be acceptable in all monitoring applications where real-time requirements are not very strict. ...
ppt
ppt

... Other Main Driving Goals (In Order) • Communication should continue despite failures – Survive equipment failure or physical attack – Traffic between two hosts continue on another path ...
DiCAP - An Architecture for Distributed Packet Capturing
DiCAP - An Architecture for Distributed Packet Capturing

... © 2009 UZH, IFI ...
ppt
ppt

... •We check for how many iterations, TULIP yields similar results •80% of the path show faults persisting long enough for TULIP to diagnose them (typical time a binary search takes to locate a fault : 6 runs) ...
basics
basics

...  circuit switching: dedicated circuit per call: telephone net  packet-switching: data sent thru net in discrete “chunks” ...
Enterprise Network Management
Enterprise Network Management

... …is the process of monitoring and controlling a large complex distributed system of dumb devices where failures are common and resources scarce Enterprise networks are large but closely managed ...
Enterprise Network Management
Enterprise Network Management

... …is the process of monitoring and controlling a large complex distributed system of dumb devices where failures are common and resources scarce Enterprise networks are large but closely managed ...
WAN - ULB
WAN - ULB

... • Later Standardized by CCITT ...
Introduction to Computer Communication
Introduction to Computer Communication

... How: tagging. Internet: add an application-specific identifier (port number) so that receiving end-system can hand in incoming packet to the correct application ...
Network Security
Network Security

...  Considered to be the first line of defense in protecting information on the network  Different methods of a firewall: ...
ALevelComputing_Session13
ALevelComputing_Session13

... These rules will include that method of transmission (serial or parallel, the bit rate, transmission modes (simplex, duplex, half) and error checking. If using parity both computers would need to be using even parity or odd. If there are any differences to any of these rules then messages would be n ...
PowerPoint File - Regis University: Academic Web Server for Faculty
PowerPoint File - Regis University: Academic Web Server for Faculty

... for an incoming packet • Routing tables are maintained in the kernel and also in routers throughout the Internet • If the server does not know where to send it next, it uses the Address Resolution Protocol to determine next action ...
pptx - NOISE
pptx - NOISE

... – Can end-to-end measurements ever be practically supported? ...
Document
Document

... – Abbreviation for Advanced Research Projects Agency. Backbone Network – Used to refer to a central network to which many routers connect. ...
Physical Networks
Physical Networks

... • Internet router – A small computer that physically attaches to two networks – Passes packets from one network to the other – As the Internet’s topology becomes more complex, routers need to know about that topology – More on routers later… ...
report_698430005
report_698430005

... resources, especially significant in the mobile domain for packet switching services ◦ Service triggering toward application servers in accordance with user service profiles ◦ Solution for PSTN (public switched telephone network) renewal and expectations of OPEX/CAPEX (capital expenditure) ...
Connectivity
Connectivity

... • Virtual LANs (VLANs) logically separate networks within networks • Use switches to group a number of ports into a broadcast domain – Combination of ports making up a Layer 2 segment • In TCP/IP, referred to as a subnet ...
Network Physics
Network Physics

... • Use predicting, interpolating, and reconciling later to improve game play. • When using prediction, transmit not just position information, but also velocity and acceleration. • Latch or queue user input (for example, keystrokes) until the next time communications data is to be sent. If you use th ...
William Stallings Data and Computer Communications
William Stallings Data and Computer Communications

... support range of network services differentiated on basis of performance • IP Packets labeled for differing QoS using existing IPv4 Type of Service or IPv6 Traffic calss • Service level agreement established between provider and customer prior to use of DS • Built in aggregation • Good scaling to la ...
IPSec (IP Security)
IPSec (IP Security)

... second set of shared secret keys Phase1-SA is used to setup IPSec SAs usually (at least)two unidirectional IPSec SAs Phase2 repeated to change keys, Phase1-SA remains ...
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Deep packet inspection

Deep Packet Inspection (DPI, also called complete packet inspection and Information eXtraction or IX) is a form of computer network packet filtering that examines the data part (and possibly also the header) of a packet as it passes an inspection point, searching for protocol non-compliance, viruses, spam, intrusions, or defined criteria to decide whether the packet may pass or if it needs to be routed to a different destination, or, for the purpose of collecting statistical information. There are multiple headers for IP packets; network equipment only needs to use the first of these (the IP header) for normal operation, but use of the second header (TCP, UDP etc.) is normally considered to be shallow packet inspection (usually called Stateful Packet Inspection) despite this definition.There are multiple ways to acquire packets for deep packet inspection. Using port mirroring (sometimes called Span Port) is a very common way, as well as an optical splitter.Deep Packet Inspection (and filtering) enables advanced network management, user service, and security functions as well as internet data mining, eavesdropping, and internet censorship. Although DPI technology has been used for Internet management for many years, some advocates of net neutrality fear that the technology may be used anticompetitively or to reduce the openness of the Internet.DPI is used in a wide range of applications, at the so-called ""enterprise"" level (corporations and larger institutions), in telecommunications service providers, and in governments.
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