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3/11
3/11

... Sniffers are most common tools used by attackers Data link layer of the protocol stack is targeted Sniffer is a program that gathers traffic from local network & is useful for attackers for attackers to get all information as well as network administrators trying to trouble shoot problems An attacke ...
New Methods of Telephony Service
New Methods of Telephony Service

... So with the many challenges of the aging public Circuit Switched system, where do we go next? How can we improve our quality of voice communication with this aging system? How do we optimize our funds to support all of our communication needs? Data networks and eCommerce make up a major portion of t ...
Final - Computer Science at Princeton University
Final - Computer Science at Princeton University

... 2(c) Consider the protests in Egypt when the government shut down access to the Internet and the phone network. Suppose the protestors had built an “ad hoc” network to communicate in a peer fashion (say, using the Bluetooth interface on their phones). The protestors would want to sign and encrypt th ...
Using NViz tool for Environmental Sensor Networks Anh-Vu Dinh-Duc , Non-member
Using NViz tool for Environmental Sensor Networks Anh-Vu Dinh-Duc , Non-member

... cannot verify with the change of application scenarios[1, 2]. Users have to modify and re-compile program or create new plug-in module for these tools if they want to use it in their applications. NetViewer[7], a universal visualization tool for WSN, has been introduced at GLOBECOM 2010. It allows u ...
Lecture 3: Application layer: Principles of network applications
Lecture 3: Application layer: Principles of network applications

... connected • may have dynamic IP addresses • do not communicate directly with each other ...
Payload Attribution via Hierarchical Bloom Filters
Payload Attribution via Hierarchical Bloom Filters

... Current Forensic Server has 1.3TB of storage with over 3 months worth of data from the edge-router and two subnets Normal bandwidth consumption of network is about a 1 – 2 TB/day Synopses reduces this traffic to about 20GB/day A 4TB Forensic Server will take over operations in July ...
Week 6
Week 6

... connection is one that exists only in the software, while a physical connection is one that exists in the hardware • Note that in a network architecture, only the lowest layer contains the physical connection, while are higher layers contain logical connections ...
Computer Science 461 Final Exam May 22, 2012 1:30-3:30pm
Computer Science 461 Final Exam May 22, 2012 1:30-3:30pm

... 2(c) Consider the protests in Egypt when the government shut down access to the Internet and the phone network. Suppose the protestors had built an “ad hoc” network to communicate in a peer fashion (say, using the Bluetooth interface on their phones). The protestors would want to sign and encrypt th ...
PPT Version
PPT Version

... Edge devices in the access network are vulnerable to physical compromise ...
A Mobile-IP Based Mobility System for Wireless Metropolitan Area
A Mobile-IP Based Mobility System for Wireless Metropolitan Area

... to 400ms of delay time during handoff The fast handoff scheme intends to reduce the handoff delay by minimize the address resolution delay time It achieves this by pre-configuration of the care-of address in the visiting network The MSS to broadcast its knowledge to the potential target BS so that t ...
No Slide Title - Network Insight Institute
No Slide Title - Network Insight Institute

... 2-G mobiles, PABX phones, and cordless telephones.  As we enter into knowledge-based information society at the turn of the century, main focus on communication is being shifted towards ubiquitous high speed wireless multimedia/internet. “Anywhere access for data” will be the major topics for the n ...
Guide to Firewalls and Network Security with Intrusion Detection and
Guide to Firewalls and Network Security with Intrusion Detection and

... CPU resources and time Bastion host that hosts the firewall should be robust enough to manage encryption and other security functions Encrypted packets may need to be padded to uniform length to ensure that some algorithms work effectively Can result in slowdowns Monitoring can burden system adminis ...
Firewalls and VPN
Firewalls and VPN

... A firewall is a specially programmed router that sits between a site and the rest of the network. It is a router in the sense that it is connected to two or more physical networks and it forwards packets from one network to another, but it also filters the packets that flow through it. A firewall al ...
Unified Services Routers - D-Link
Unified Services Routers - D-Link

blue
blue

... Implementation • Use a sniffer program read offline packets • Packet proceed to IP defragmentation • Packet proceed to TCP stream reassembly ...
Network Architectures - Computing Sciences
Network Architectures - Computing Sciences

... Used by wireless LANs because not all wireless devices can hear each other When network is quiet, device sends ‘intent-to-transmit’ signal Slower than CSMA/CD ...
Document
Document

... using traditional protocols is the bottle-neck of parallel systems • Myrinet with TCP/IP is not FAST. • Small-granularity or communication-dense apps ...
View File - UET Taxila
View File - UET Taxila

... High level of fault tolerance makes it more reliable, since it has multiple path for the delivery of data. This network is scalable for a small network but may be problematic while setting routing path for larger networks as it may take longer time to set up the routing path and also the end to end ...
Network Segmentation Through Policy Abstraction
Network Segmentation Through Policy Abstraction

... Cisco Identity Services Engine (ISE) — be it a laptop, desktop, server, printer, even smoke alarms and video cameras, and other things — it is connected and assigned its proper role with an appropriate SGT, it can only connect to approved servers with approved protocols, enforced by Security Group A ...
CCNA Cheat Sheet Internetworking Essentials
CCNA Cheat Sheet Internetworking Essentials

... 10Base5 (Thicknet) – Original Ethernet cabling media. Up to 500m per segment. Highly resistant to EMI. Uses physical and logical bus topology with clients connecting using vampire clasps. Data transmission up to 10Mbps. Now obsolete. 10Base2 (Thinnet) – Replaced Thicknet because it was lighter and t ...
QUESTION NO
QUESTION NO

... Split horizon – the routing protocol advertises routes out an interface only if they were not  learned from updates entering that interface. Hold­down timer – After finding out that a router to a subnet has failed, a router waits a  certain period of time before believing any other routing informati ...
Introduction to Operating Systems
Introduction to Operating Systems

... • “Kismet is an 802.11 layer2 wireless network detector, sniffer, and intrusion detection system. Kismet will work with any wireless card which supports raw monitoring (rfmon) mode, and (with appropriate hardware) can sniff 802.11b, 802.11a, 802.11g, and 802.11n traffic. Kismet also supports plugins ...
Chapter 15 Local Area Networks
Chapter 15 Local Area Networks

... • Connection to backbone LAN: Use control modules to connect to both types of LANs • Service area: 100 to 300 m • Low power consumption:Need long battery life on mobile stations — Mustn't require nodes to monitor access points or frequent handshakes ...
Title
Title

... • A child of Stanford's Future Internet research programme • Separating control and user plane Currently being standardized at ...
3rd Edition: Chapter 3
3rd Edition: Chapter 3

... Q: how does network get subnet part of IP addr? A: gets allocated portion of its provider ISP’s address ...
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Cracking of wireless networks

Cracking of wireless networks is the defeating of security devices in Wireless local-area networks. Wireless local-area networks(WLANs) – also called Wi-Fi networks are inherently vulnerable to security lapses that wired networks are exempt from.Cracking is a kind of information network attack that is akin to a direct intrusion. There are two basic types of vulnerabilities associated with WLANs: those caused by poor configuration and those caused by weak encryption.
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