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ppt
ppt

... Firewalls • Basic problem – many network applications and protocols have security problems that are fixed over time • Difficult for users to keep up with changes and keep host secure • Solution • Administrators limit access to end hosts by using a firewall • Firewall and limited number of machines ...
Proxies, Active Networks, Re-configurable Terminals: The Cornerstones of Future Wireless Internet
Proxies, Active Networks, Re-configurable Terminals: The Cornerstones of Future Wireless Internet

... we would mostly like to address individual processes. This granularity, jointly with additional error recognition, is given by UDP (for delay-sensitive, error-insensitive applications), while granularity jointly with reliable delivery is provided by TCP (for error-sensitive, delay-insensitive traffi ...
L17
L17

... • Packets consume resources and are dropped elsewhere in network • Solution: congestion control for ALL traffic ...
Intrusion Detection Systems:
Intrusion Detection Systems:

... Current versions of Tripwire encrypt these files and a passphrase is required if changes are needed to be made to any of them. Plaintext versions of the configuration and policy files are available for making modifications, but should be deleted after implementing those changes. ...
Co-authors Point of View
Co-authors Point of View

... Request source anonymity doesn’t stop bad actors identifying material accessed and monitoring network traffic to identify sources Just a bit more difficult than with an address ...
stributed Computing : Current Theories and Current Practices
stributed Computing : Current Theories and Current Practices

... networked environment. Although such an environment can be extremely complex, we thankfully have, for most all practical purposes, one network in this environment – the Internet, made up of a standard set of software protocols that are recognized by nearly all computer software creators. Most distri ...
P4P : Provider Portal for (P2P) Applications Haiyong Xie, et al
P4P : Provider Portal for (P2P) Applications Haiyong Xie, et al

... a portal for each network resource provider Allows P4P to divide traffic control responsibilities between ap plications and network providers Makes P4P incrementally deployable and extensible iTracker of a provider can be identified in various ways ...
Citrix GoToMyPC Corporate Technology
Citrix GoToMyPC Corporate Technology

... While GoToMyPC® Personal is an easy-to-use, turnkey remote-access solution for individuals, GoToMyPC Corporate makes this same user-friendly remote-access solution available to corporate users. Through enterprise-class administration features, GoToMyPC Corporate gives IT administrators complete cont ...
Document
Document

... • buffering when arrival rate via switch exceeds output line speed • queueing (delay) and loss due to output port buffer overflow! ...
Switching and Routing
Switching and Routing

... link by having multiple virtual channels: – Each virtual channel has one buffer with the related flow control mechanism. – The switch can use some scheduling algorithm to select flits in different buffer for ...
Week_Twelve_ppt - Franklin University Computing Sciences
Week_Twelve_ppt - Franklin University Computing Sciences

... • H.323 is a standard for teleconferencing that was developed by the International Telecommunications Union (ITU). • It supports full multimedia audio, video and data transmission between groups of two or more participants, and it is designed to support large networks. • H.323 is still a very import ...
jxta technology
jxta technology

... This protocol allows a peer to ask a peer router for available routes for sending a message to a destination peer as often, two communicating peers may not be directly connected to each other. Any peer can decide to become a peer router by implementing the Peer Endpoint Protocol. ...
Full Presentation
Full Presentation

... Yes ...
Slides
Slides

... Firewalls • Two types: packet filtering, and application gateways. • Packet filtering is done based on IP addresses, TCP or UDP ports, ICMP message type, TCP SYN or ACK bits (first segment has ACK=0 so this prevents outside users to open TCP connections with inside servers). • Application gateways ...
presentation
presentation

... Telcos’ Options for Survival Option #1: Break “network + service” vertical integration: – Build less, use more: open cable capacity to service providers – Telcos become “hollow pipes” ...
SANS Top 5 Essential Log Reports
SANS Top 5 Essential Log Reports

... In June of 2000, the "SANS/FBI Top 10 Critical Vulnerabilities" consensus list was created. This list identified the ten most frequently exploited vulnerabilities on the Internet. While the list was not intended to be a complete list of all possible threat models, it was an extremely useful action i ...
The NEBULA Future Internet Architecture
The NEBULA Future Internet Architecture

... •  What  are  the  scalability  barriers?   •  What  are  the  technical/economic  tradeoffs   among  redundancy:  1)  inside  routers,  2)  inside   data  centers  and  3)  between  routers?   •  Algorithms  and  Interfaces  for  path   ...
Virtual Router - UCF CS - University of Central Florida
Virtual Router - UCF CS - University of Central Florida

... • Street width is 10 meters, and building block size is 100m by 100m. • Initial nodes placement: 2 nodes per intersection, and 8 nodes per block. • Mobility model: At intersections, a node pauses for a period of time, and then probabilistically changes its direction of movement. • Speed: random betw ...
QoS Networking Requirements
QoS Networking Requirements

... just storage plus best effort – basically, an ISP plus some diskspace on some servers…not relevant (NB Care – term “Web Services” now common place for middleware such as SOAP and WSDL…not same thing – they are relevant to TAPAS of course!)/ • Goal of CSP (e.g. Akamai, Inktomi etc) is to optimise Web ...
IP address - ECS Networking
IP address - ECS Networking

... ¡  Hosts  learn  IP  →  Ethernet  address  mappings   §  ARP  responses  are  stored  in  ARP  tables   §  ARP  requests  are  stored  in  ARP  tables  (whether   ...
CCNA 1 v5.1 Practice Final Exam Answers 2016 100% PDF
CCNA 1 v5.1 Practice Final Exam Answers 2016 100% PDF

... o mesh o ring o star 16. What type of communication rule would best describe CSMA/CD? o access method o flow control o message encapsulation o message encoding 17. If data is being sent over a wireless network, then connects to an Ethernet network, and eventually connects to a DSL connection, which ...
Denial of service (DOS) - Computer Science and Engineering
Denial of service (DOS) - Computer Science and Engineering

... • In some TCP/IP stack implementations those kinds of packets may cause the victim's host to crash. • Any remote user that can send spoofed packets to a host can crash or "hang" that host. • Possible solution for this attack is to block IP-spoofed packets. Attacks like those of the Land tool rely on ...
Chapter 7 Lecture Presentation
Chapter 7 Lecture Presentation

... Routing in Packet Networks Shortest Path Routing ATM Networks ...
TCP/IP Internetworking (Part 2)
TCP/IP Internetworking (Part 2)

...  In this case network 192.168.x.x and network 60.x.x.x).  An “x” indicates anything Corporate network 192.168.x.x ...
Presenting
Presenting

... • Header Length (because of the options field) • Total length includes header and data • Service Type – lets user identify his needs in terms of bandwidth and delay (for example QoS) • Time to Leave prevents a packet from looping forever • Protocol, indicates the sending protocol (TCP,UDP,IP…) • Sou ...
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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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