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3rd Edition: Chapter 2
3rd Edition: Chapter 2

...  learn about transport layer protocols in the Internet:  UDP: connectionless transport  TCP: connection-oriented transport  TCP congestion control ...
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... opposed to all clients accessing the same central server, so as to avoid bottleneck near that server. Content types include web objects, download-able objects (media files, software, documents), applications, real time media streams, and other components of internet delivery (DNS, routes, and databa ...
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... Standards for telecommunications equipment: 14 sets including PSTN and ISDN connections Standard for radio communications equipment: 22 sets covering various mobile technologies such as GSM, CDMA,PHS. Standard for networks connections: 17 sets covering interfaces, signaling, synchronization etc… Sta ...
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... • Public topology – The collection of providers that provide Internet connectivity • Site topology – The level local to an organization that does not provide connectivity to nodes outside itself • Interface identifier – The level specific to a node’s individual interface ...
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Chapter 4 slides - University of Massachusetts Lowell

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... need to mention a header we'll only mention elds we need at the point. It does not mean there are no other elds. 5 Unless the interface is in promiscuous mode, which allows to grab all the packets, e.g., for auditing. See also section 2.3, p. 11. ...
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< 1 ... 204 205 206 207 208 209 210 211 212 ... 474 >

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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