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Snort Intrusion Detection
Snort Intrusion Detection

... Content Content offset Content depth Session recording ICMP type ICMP code Alternate log files ...
Layer
Layer

... • multiple qualities of service • Internet • network layer is provided by Internet Protocol • found in all end-systems and intermediate systems • provides abstraction of end-to-end link • segmentation and reassembly • packet-forwarding, routing, scheduling ...
Data Communications and Computer Networks
Data Communications and Computer Networks

... Application Layer Responsible for providing services to the user ...
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... Timestamp: Every router along the route attaches a timestamp to the packet Security: Packets are marked with user info, and the security classification of the person on whose behalf they travel on the network w Most of these options pose security holes and are ...
Modernization as a key to lower production costs
Modernization as a key to lower production costs

... found on the machine level. Under some circumstances homogenizing the network can only be the longterm goal or is the result of the modernization. In between different solutions must be found. Gateways With being able to adopt the physical properties of one network to another network, gateways typic ...
Chapter 15
Chapter 15

... Reproduction or translation of this work beyond that permitted in Section 117 of the 1976 United States Copyright Act without the express written permission of the copyright owner is unlawful. Request for further information should be addressed to the Permissions Department, John Wiley & Sons, Inc. ...
Chapter 18 Internet Protocols
Chapter 18 Internet Protocols

... — Corporate internet operating within the organization — Uses Internet (TCP/IP and http)technology to deliver documents and resources ...
PPT
PPT

... Computers Connected to the Internet are called Hosts ...
Week_Four_Network_MIMIC_ppt
Week_Four_Network_MIMIC_ppt

... Identify User Communities and Data Stores A user community is a group of workers who use a particular application. They can exist in a department or group of departments. A User Communities chart should be utilized to record this type of information in. A data store is an area in a network where app ...
TERMINOLOGIES
TERMINOLOGIES

... - A protocol platform, introduced by ITU-T, to support the integrated, high-speed transmission of data, audio and video in a seamless fashion. - ATM emerged as a suitable transport standard. The B-ISDN architecture model has been adopted by ATM, which is referred as the ATM reference ...
Packet Switching
Packet Switching

... be executed for all packets independently of their size): packet per second metric => Throughput is a function of traffic ...
Internet Quality of Service
Internet Quality of Service

... highest quality possibly (tragedy of the commons). » Several schemes proposed, work in progress. – Accounting and charging, IETF work in progress – Management could be done by connecting to the well ...
Internet Peering has Obsolesced Interconnection Regulation
Internet Peering has Obsolesced Interconnection Regulation

... choice  to  take  their  traffic  and  business  elsewhere.  No  chokepoints  mean  no  need  for  proscriptive  regulation  of   Internet  peering  arrangements.     2. Software-­‐dependent  vs.  hardware  dependent   Railroad  and  electricity ...
ppt - Pacific University
ppt - Pacific University

... • differences in letters are speed and security • what does a 1 and 0 look like? ...
ppt
ppt

... • The past two slides discussed the kinds of information the header must provide • Will now show the syntax (layout) of the header, and discuss the semantics in more detail ...
networking
networking

... Lease must be renewed periodically Easy to make global network changes Linux: BOOTPROTO=dhcp ...
Ch 2: TCP/IP Concepts Review
Ch 2: TCP/IP Concepts Review

...  By guessing ISN values, a hacker can hijack a TCP session, gaining access to a server without logging in ...
MQ3624532158
MQ3624532158

... and Data channels. H. Luo, S. Lu and V. Bharghavan [8] propose a new model to address the trade-off between fairness and channel utilization, which concentrates on ensuring the fair allocation of channel bandwidth and maximizing the spatial reuse. Some other scheduling and priority algorithms are al ...
an Overview of the Optelian FLEX architecture™
an Overview of the Optelian FLEX architecture™

... Mobile devices such as tablets and smartphones are proliferating at an amazing rate. In 2012, for the first time ever, more smartphones were sold than computers, driven by decreasing price points and an increase in consumer appetite for mobile web browsing, streaming video, and apps. While improved ...
IPTV
IPTV

... Service Provider IP Network: the backbone network of the service provider (or multiple service providers). E.g. an ISP’s or telecommunication companies network, using IP over high speed WAN (e.g. SDH, fibre) Service Provider Access Network: often called the “last mile” to the users premise (house, o ...
Cisco – Chapter 11 - YSU Computer Science & Information
Cisco – Chapter 11 - YSU Computer Science & Information

... Traffic Reliability Security ...
ans - EECS: www-inst.eecs.berkeley.edu
ans - EECS: www-inst.eecs.berkeley.edu

... 1e)  [6  points]  Consider  the  following  network,  with  nodes  A  through  J.  The  numbers  indicate   the  link  weights  or  costs  (so  shortest  paths  are  paths  with  the  lowest  cumulative  cost).  In  the   following   ...
Lecture 1: Course Introduction and Overview
Lecture 1: Course Introduction and Overview

... – Myrinet is an example ...
Lecture 1
Lecture 1

... • Question: how long does it take an Internet “packet” to travel from Jerusalem to New York? • Answer: – For sure  30.55 msec – Depends on: • The route the packet takes (could be circuitous!) • The propagation speed of the links the packet traverses – E.g., in optical fiber light propagates at abou ...
Payload Attribution via Hierarchical Bloom Filters
Payload Attribution via Hierarchical Bloom Filters

... Query processing would be expensive with raw data  What’s the frequency of traffic to port 80 in the past week? (raw data vs. a histogram) ...
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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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