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Introduction
Introduction

... Local Area Networks(10-100 Mbps) Metropolitan Area Networks Wide Area Networks Wireless Networks Home Networks ...
How to bypass the firewall
How to bypass the firewall

... characteristics stated in book of [Stallings]: - All the traffics, which try to go in or out the network, must pass through the firewall. - Only the authorized traffic that defined by the local security policy will be permitted to pass the firewall. - The firewall itself is immune to be penetrated, ...
Chapter 2 Networking Overview
Chapter 2 Networking Overview

... – Content of state table (source & destination IP address and port# , timeout) Basis of packet forwarding decision – State table – rule set ACK packets may be dropped if there was no associated SYN packet in state table May remember outgoing UDP packets to restrict incoming UDP packets to replies Mo ...
投影片 1
投影片 1

... destination vehicle as long as one exists. • Currently, our protocol is designed for IVC networks formed by a few vehicles moving on the same lane. ...
Document - Oman College of Management & Technology
Document - Oman College of Management & Technology

... • IP routing works as follow: – Each data packet is labeled with IP address of the destination host 137.189.90.184 1500 bytes Data here ...
Abstract: Performance Analysis of RPL over AMI (Advanced
Abstract: Performance Analysis of RPL over AMI (Advanced

... {taekk.lee kkim86}@gmail.com ...
PPTX
PPTX

... – What about the other problems listed? – War story: Byte swapping problem while routing @ MIT ...
Firewalls
Firewalls

... which then sends the internal users requests out through its client ( keeps track of which users requested what, do redirect returned data back to appropriate user) ...
Firewalls
Firewalls

... which then sends the internal users requests out through its client ( keeps track of which users requested what, do redirect returned data back to appropriate user) ...
ABC`s of the Internet Cancer Registry
ABC`s of the Internet Cancer Registry

... It would be great to have all cancer data providers wired to the cancer registry via a private Wide Area Network (WAN). However, this is an impractical solution due to its enormity and the costs involved of setting up a private network spanning the entire state. Virtual Private Networks (VPN) are an ...
Defense - Northwestern Networks Group
Defense - Northwestern Networks Group

... • MAC address ...
ESX 2008 VoIP
ESX 2008 VoIP

... The above figure shows the communication path through a Non-facilitated Voice over IP provider. In this example the alarm panel has a POTS connection from the MTA. The MTA then converts the call into IP packets and sends the information through the DSL modem to the Internet using and then onto the V ...
Chapter17 - Website Staff UI
Chapter17 - Website Staff UI

... – Nature of the signals – Data rate ...
Week-10.3-2
Week-10.3-2

... created by ISO (unpopular – too general) ...
Introduction to Internet
Introduction to Internet

... TCP/IP • IP Internet Protocal – router software • TCP Transmission Control Protocol – software manages creating packets on both sending and receiving routers ...
Section 5A
Section 5A

... Topology: Physical or logical layout of cables and devices that connect the network nodes Media: wires and cables that carry data from source to destination Bandwidth: amount of data media can ...
No Slide Title
No Slide Title

... real-time media data along with synchronization information over a datagram ...
03-PacketSwitching-TRybczynski-13Jan2016
03-PacketSwitching-TRybczynski-13Jan2016

... • Carriers developed connection-oriented & connectionless ‘Layer 2’ packet services to meet enterprise needs • MPLS was also developed as carrier backbone technologies for enhanced traffic management capabilities ...
Q and A slides
Q and A slides

... that “IP is designed to run over any type of network”? And, how is IP “best-effort”? A: It means that IP was designed to operate over networks that provide few guarantees. It does not require absolutely perfect, fast, robust layer 2 hardware/protocols. It just requires that the lower layer do its be ...
The Power of Modern Information Systems
The Power of Modern Information Systems

... finally to the global Internet. On the battlefield a communications network will sustain damage, so the DOD designed TCP/IP to be robust and automatically recover from any node or phone line failure. This design allows the construction of very large networks with less central management. However, be ...
Slide 1
Slide 1

... Apply the algorithms behind some current network security protocols. Understand firewalls and their applications.. Demonstrate detailed knowledge of TCP/IP. ...
William Stallings Data and Computer Communications
William Stallings Data and Computer Communications

... • Two levels of addressing required • Each computer needs unique network address • Each application on a (multi-tasking) computer needs a unique address within the computer  The service access point or SAP ...
QoS: IntServ and DiffServ
QoS: IntServ and DiffServ

... • Rate limiting of EF packets at edges only, using token bucket to shape transmission • Simple forwarding: classify packet in one of two queues, use priority – EF packets are forwarded with minimal delay and loss (up to the capacity of the router) ...
15-441 Computer Networking Lecture 2 - Protocol Stacks
15-441 Computer Networking Lecture 2 - Protocol Stacks

... • Implementing a functionality at a lower level should have minimum performance impact on the applications that do not use the functionality ...
Transmission Methods
Transmission Methods

... Protocols were engineered to the specifications of a single vendor – AT&T or IBM Then came minicomputers and PCs, relaxed regulations, new kinds of traffic, and many and varied vendors There was a need for interconnection, but protocols remained vendor-specific Standards-setting bodies could not kee ...
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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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