... fairness and DPI is the cornerstone in enabling those
through informed decisions.
2 - UTRGV Faculty Web
• When an application sends a message – The message
passes down through the layered protocols – A given
layer adds information and forms a packet – The
computer transmits the final packet
• When a packet arrives – The packet passes up through
the protocol layers – A given layer performs pr ...
... Packet switching is a digital networking communications method that groups all
transmitted data into suitably sized blocks, called packets, which are transmitted via
a medium that may be shared by multiple simultaneous communication sessions.
Deployed and Emerging Security Systems for the Internet
... • tunnel – a point-to-point connection over which the
communication takes of machines (not located at the endpoints
of this connection) takes place
• secure tunnel can be used to connect several parts of network
of the same organization over (insecure) internet
– such configuration is called virtual ...
PH19510 Lecture 12
... over telephone line
Must be in audio
Encode 1 & 0 as tones
Nowadays up to 56kbps
This morning one of our programmers, Zundra Daniel went up to
... causes severe packet collision problems. This does not occur on most wired networks
because most networks use switches or routers (wired not wireless) instead of hubs.
Switches and routers are "intelligent" and know which computer an individual packet is
intended for and only send the packet to that ...
... wide-band communication lines
[which provided] the functions
of present-day libraries together
with anticipated advances in
information storage and retrieval
and [other] symbiotic functions.”
4 Communication networks
... uses TDM (Time Division Multiplexing) techniques.
Standardized bandwidth (bit-rate) include
McGill University Monday, Sept 21 st 2009
... abstraction layering, the designers avoided the burden of trying to imagine every possible end user
requirements in terms of communication and implementing solutions. Besides, even if they did so, it is
almost inevitable that at some point, a user would have required a variation of the service provi ...
1. Application layer, Transport layer, Internet layer, Link layer 2
... 4. A packet is a protocol delivery unit (PDU) that is exchanged between
hosts at Layer 3 of the OSI model. In TCP/IP, IP packets consist of a
header and payload and are routed based on the source/destination IP
addresses contained in the header, amongst other things. A frame is a
PDU at the Layer 2 ...
Deep Packet Inspection - Computer Science and Engineering
... A class of packet processing applications
need to inspect packets deeper than the
protocol headers and analyze its payload
– Network Security
– HTTP load balancing
– XML processing
– Content-based billing and forwarding
... L-1 Intro to Computer Networks
Acknowledgments: Lecture slides are from the graduate level Computer
Networks course thought by Srinivasan Seshan at CMU. When slides are
obtained from other sources, a reference will be noted on the bottom of
Only $7000 USD - Network Forensics | Lawful Interception
... All data packets on Ethernet are broadcasted in the network, i.e., all
physical signals will flow to the network Interface card of the
appliance. NIC card can be under promiscuous mode, so it can
receive all data no matter what the MAC address it is. This is what
the basic of Sniffer all about.
A scalable multithreaded L7-filter design for multi
... packet header information. But many applications, such as P2P
and HTTP, hide their application characteristics in the payload.
The original L7-filter is a sequential DPI(Deep packet Inspection)
program that identifies protocol information in a given connection.
Traditional single core server is ...
Understanding and Installing Firewalls
... known as an application layer firewall. Marcus Ranum's work on the
technology spearheaded the creation of the first commercial product.
The product was released by DEC who named it the DEC SEAL
product. DEC’s first major sale was on June 13, 1991 to a chemical
company based on the East Coast of the ...
Test 3 review guide 50 questions 10 T/F and 40 multiple choices
... Test 3 review guide
10 T/F and 40 multiple choices
*** To prepare for the test you must refer to the lecture notes and lecture book posted on the course website and
don’t forget the lecture complement posted on the course website (Check the announcement page)
1- Networking and ...
see Jose`s poster
... • The more packets to be captured per unit time, the
higher the relative error. One reason for that is
excessive load in the operating system.
• The developed sniffer could be implemented in
intermediate routers to better select network routes
based on their congestion level.
• Additional packet pro ...
INTERNET CONNECTIONS How does data get from point A to point
... A protocol is a set of rules for exchange of data among two or more parties (e.g.,
among computers in a network).
A packet-switched network protocol needs to specify the following (at a minimum):
– The structure of a packet
– Format for source and destination address
– Routing of packets through the ...
The Internet - Matthew T. Jones
... • Computer scientist Bob Taylor devised a
way to use a single terminal to access
multiple computer mainframes.
• In 1969, Dr. Larry Roberts of ARPA
created the ARPAnet by combining
multiple computers into a single network
through Interface Message Processors
(IMPs) which could communicate with one
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.