ZigBee: The Emerging Technology in Building Automation
... intermittent data, and repetitive low latency data. The characteristics of each are as follows: • Periodic data – usually defined by the application such as a wireless sensor or meter. Data typically is handled using a beaconing system whereby the sensor wakes up at a set time and checks for the bea ...
... intermittent data, and repetitive low latency data. The characteristics of each are as follows: • Periodic data – usually defined by the application such as a wireless sensor or meter. Data typically is handled using a beaconing system whereby the sensor wakes up at a set time and checks for the bea ...
Network Address Translation for Inbound Connections in Paradigm
... use private IP addresses that are not routed over the Internet. Private IP address schemes allow organizations to limit the number of publicly routed IP addresses they use, reserving public addresses for Web servers and other externally accessed network equipment. NAT allows administrators to use on ...
... use private IP addresses that are not routed over the Internet. Private IP address schemes allow organizations to limit the number of publicly routed IP addresses they use, reserving public addresses for Web servers and other externally accessed network equipment. NAT allows administrators to use on ...
Document
... improving process for defending IT assets • The CND approach in this Chapter includes: – Lightweight process for CND – Set of open source scripts for network monitoring and Advanced Log Analysis (ALA) on Backtrack – Agile strategy for escalating defenses – Cyber investigations process – Scenario for ...
... improving process for defending IT assets • The CND approach in this Chapter includes: – Lightweight process for CND – Set of open source scripts for network monitoring and Advanced Log Analysis (ALA) on Backtrack – Agile strategy for escalating defenses – Cyber investigations process – Scenario for ...
Chapter1-Intro - Communications Systems Center (CSC)
... 1.2 Network edge 1.3 Network core Network access and physical media Internet structure and ISPs 1.4 Delay & loss in packet-switched networks 1.5 Protocol layers, service models ...
... 1.2 Network edge 1.3 Network core Network access and physical media Internet structure and ISPs 1.4 Delay & loss in packet-switched networks 1.5 Protocol layers, service models ...
Network+ Guide to Networks 6th Edition
... • Model for understanding and developing network computer-tocomputer communications • Developed by ISO in the 1980s • Divides network communications into seven layers • Physical, Data Link, Network, Transport, Session, Presentation, Application ...
... • Model for understanding and developing network computer-tocomputer communications • Developed by ISO in the 1980s • Divides network communications into seven layers • Physical, Data Link, Network, Transport, Session, Presentation, Application ...
WP- Evolution of Network Security
... This approach to firewalling had some value: ■■ It weeded out very clearly malicious traffic, such as incoming sessions to unusual TCP port numbers. ■■ It was simple to understand, and simple to implement. ■■ As the logic was simple, it could be easily realized in a hardware device, to provide accel ...
... This approach to firewalling had some value: ■■ It weeded out very clearly malicious traffic, such as incoming sessions to unusual TCP port numbers. ■■ It was simple to understand, and simple to implement. ■■ As the logic was simple, it could be easily realized in a hardware device, to provide accel ...
DICOM IMAGE SECURE COMMUNICATIONS WITH INTERNET
... First, the American College of Radiology (ACR) standard for teleradiology, adopted in 1994, defines guidelines for qualifications of both physician and non physician personnel, equipment specifications, quality improvement, licensure, staff credentialing, and liability the DICOM Standard specifies s ...
... First, the American College of Radiology (ACR) standard for teleradiology, adopted in 1994, defines guidelines for qualifications of both physician and non physician personnel, equipment specifications, quality improvement, licensure, staff credentialing, and liability the DICOM Standard specifies s ...
Profile and Role-based Firewall Control for Campus Classroom Labs
... concentration point/rack/closet/room. L3 switches are sometimes used. In order to save the assigned public IP address space and protect from direct outside attacks, the labs are usually behind a small router/ ...
... concentration point/rack/closet/room. L3 switches are sometimes used. In order to save the assigned public IP address space and protect from direct outside attacks, the labs are usually behind a small router/ ...
Converge without Conflation
... – We need to know how stable this type of network will be – We need to know what the cost savings are – We need to know how well connected a mesh network needs to be to provide a good non-blocking ratio ...
... – We need to know how stable this type of network will be – We need to know what the cost savings are – We need to know how well connected a mesh network needs to be to provide a good non-blocking ratio ...
designing network infrastructure for an e-learning cloud
... controls the network traffic by using policies and defining broadcast domains, which can be achieved by implementing routers and VLANs. Distribution layer should consist of high performance devices. Redundancy can be achieved by using multiple devices, with redundant connection among themselves, as ...
... controls the network traffic by using policies and defining broadcast domains, which can be achieved by implementing routers and VLANs. Distribution layer should consist of high performance devices. Redundancy can be achieved by using multiple devices, with redundant connection among themselves, as ...
Wi-Fi® audio: capabilities and challenges
... Wireless speakers have been growing in popularity for some time, allowing users to stream audio from ...
... Wireless speakers have been growing in popularity for some time, allowing users to stream audio from ...
Chapter 6 slides, Computer Networking, 3rd edition
... - Replace a single high power base station with several lower power base stations, each covering a smaller geographical area, a ‘cell’. - Each of the base stations is allocated a number of channels (portion of the overall system channels) 6: Wireless and Mobile Networks ...
... - Replace a single high power base station with several lower power base stations, each covering a smaller geographical area, a ‘cell’. - Each of the base stations is allocated a number of channels (portion of the overall system channels) 6: Wireless and Mobile Networks ...
A Survey on Denial of Service Attacks
... by the website those no longer for clients of that website. Distributed Denial of Service (DDOS) attacks are based on traffic volume based attacks from huge number of compromised hosts. These hosts or resources, known as ‘zombies’, form a widely distributed attack network called as ‘botnet’ [3].The ...
... by the website those no longer for clients of that website. Distributed Denial of Service (DDOS) attacks are based on traffic volume based attacks from huge number of compromised hosts. These hosts or resources, known as ‘zombies’, form a widely distributed attack network called as ‘botnet’ [3].The ...
Internet Overview - Electrical and Computer Engineering
... Internet structure: network of networks “Tier-2” ISPs: smaller (often regional) ISPs Connect to one or more tier-1 ISPs, possibly other tier-2 ISPs NAPs (Network Access Points) are complex high-speed switching networks often concentrated at a single building. Operated by 3rd party telecom or In ...
... Internet structure: network of networks “Tier-2” ISPs: smaller (often regional) ISPs Connect to one or more tier-1 ISPs, possibly other tier-2 ISPs NAPs (Network Access Points) are complex high-speed switching networks often concentrated at a single building. Operated by 3rd party telecom or In ...
Ubee DDW365 Wireless Cable Modem
... RF (cable) Output Power: TDMA/ATDMA: +8dBmV to +54dBmV (32/64 QAM). ATDMA Only: +8dBmV to +55dBmV (8/16 QAM), +8dBmV to +58dBmV (QPSK). S-CDMA: +8dBmV to +53dBmV (all modulations) *Actual speeds vary based on factors including network configuration and speed. Security and Network Supports 8 SSID ...
... RF (cable) Output Power: TDMA/ATDMA: +8dBmV to +54dBmV (32/64 QAM). ATDMA Only: +8dBmV to +55dBmV (8/16 QAM), +8dBmV to +58dBmV (QPSK). S-CDMA: +8dBmV to +53dBmV (all modulations) *Actual speeds vary based on factors including network configuration and speed. Security and Network Supports 8 SSID ...
3rd Edition: Chapter 1
... Excessive congestion: packet delay and loss protocols needed for reliable data transfer, congestion control Q: How to provide circuit-like behavior? bandwidth guarantees needed for audio/video apps still an unsolved problem (chapter 6) ...
... Excessive congestion: packet delay and loss protocols needed for reliable data transfer, congestion control Q: How to provide circuit-like behavior? bandwidth guarantees needed for audio/video apps still an unsolved problem (chapter 6) ...
Chapter1
... Chapter 1: roadmap 1.1 What is the Internet? 1.2 Network edge 1.3 Network core 1.4 Network access and physical media 1.5 Internet structure and ISPs 1.6 Delay & loss in packet-switched networks 1.7 Protocol layers, service models 1.8 History Introduction ...
... Chapter 1: roadmap 1.1 What is the Internet? 1.2 Network edge 1.3 Network core 1.4 Network access and physical media 1.5 Internet structure and ISPs 1.6 Delay & loss in packet-switched networks 1.7 Protocol layers, service models 1.8 History Introduction ...
chap04
... Deploying Software Using Group Policy • Group Policy can help deploy and maintain software installations throughout the domain • When a company rolls out a new software application, the four main phases of the process ...
... Deploying Software Using Group Policy • Group Policy can help deploy and maintain software installations throughout the domain • When a company rolls out a new software application, the four main phases of the process ...
Chapter 6 slides, Computer Networking, 3rd edition
... - Replace a single high power base station with several lower power base stations, each covering a smaller geographical area, a ‘cell’. - Each of the base stations is allocated a number of channels (portion of the overall system channels) 6: Wireless and Mobile Networks ...
... - Replace a single high power base station with several lower power base stations, each covering a smaller geographical area, a ‘cell’. - Each of the base stations is allocated a number of channels (portion of the overall system channels) 6: Wireless and Mobile Networks ...
HG253s V2 Home Gateway Product Description
... The purchased products, services and features are stipulated by the commercial contract made between Huawei and the customer. All or partial products, services and features described in this document may not be within the purchased scope or the usage scope. Unless otherwise agreed by the contract, a ...
... The purchased products, services and features are stipulated by the commercial contract made between Huawei and the customer. All or partial products, services and features described in this document may not be within the purchased scope or the usage scope. Unless otherwise agreed by the contract, a ...
SMALL FIRMS CYBERSECURITY GUIDANCE
... Study, research firm Ponemon Institute reported that smaller organizations incur a higher per capita cost than larger organizations ($1,564 and $371, respectively) due to cyber attacks.2 The SEC and FINRA have also begun examinations of cybersecurity preparedness among broker-dealers. As a result, i ...
... Study, research firm Ponemon Institute reported that smaller organizations incur a higher per capita cost than larger organizations ($1,564 and $371, respectively) due to cyber attacks.2 The SEC and FINRA have also begun examinations of cybersecurity preparedness among broker-dealers. As a result, i ...
Datasheet: OneTouch™ AT G2 Network Assistant
... Complete: a comprehensive client view of performance isolates the problem root cause starting from the physical layer, through the network and to server-hosted applications Cloud: automated, cloud-based results trending and performance analytics to troubleshoot intermittent client problems from anyw ...
... Complete: a comprehensive client view of performance isolates the problem root cause starting from the physical layer, through the network and to server-hosted applications Cloud: automated, cloud-based results trending and performance analytics to troubleshoot intermittent client problems from anyw ...
Chapter 1 - Introduction
... 30.13 Firewalls • All traffic entering/leaving the organization should passes through firewall • The firewall implements the security policy and drops packets that do not adhere to the policy • The firewall itself must be immune to security attacks • By placing a firewall on each external network c ...
... 30.13 Firewalls • All traffic entering/leaving the organization should passes through firewall • The firewall implements the security policy and drops packets that do not adhere to the policy • The firewall itself must be immune to security attacks • By placing a firewall on each external network c ...
Wireless security
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Wireless security is the prevention of unauthorized access or damage to computers using wireless networks. The most common types of wireless security are Wired Equivalent Privacy (WEP) and Wi-Fi Protected Access (WPA). WEP is a notoriously weak security standard. The password it uses can often be cracked in a few minutes with a basic laptop computer and widely available software tools. WEP is an old IEEE 802.11 standard from 1999, which was outdated in 2003 by WPA, or Wi-Fi Protected Access. WPA was a quick alternative to improve security over WEP. The current standard is WPA2; some hardware cannot support WPA2 without firmware upgrade or replacement. WPA2 uses an encryption device that encrypts the network with a 256-bit key; the longer key length improves security over WEP.Many laptop computers have wireless cards pre-installed. The ability to enter a network while mobile has great benefits. However, wireless networking is prone to some security issues. Hackers have found wireless networks relatively easy to break into, and even use wireless technology to hack into wired networks. As a result, it is very important that enterprises define effective wireless security policies that guard against unauthorized access to important resources. Wireless Intrusion Prevention Systems (WIPS) or Wireless Intrusion Detection Systems (WIDS) are commonly used to enforce wireless security policies.The risks to users of wireless technology have increased as the service has become more popular. There were relatively few dangers when wireless technology was first introduced. Hackers had not yet had time to latch on to the new technology, and wireless networks were not commonly found in the work place. However, there are many security risks associated with the current wireless protocols and encryption methods, and in the carelessness and ignorance that exists at the user and corporate IT level. Hacking methods have become much more sophisticated and innovative with wireless access. Hacking has also become much easier and more accessible with easy-to-use Windows- or Linux-based tools being made available on the web at no charge.Some organizations that have no wireless access points installed do not feel that they need to address wireless security concerns. In-Stat MDR and META Group have estimated that 95% of all corporate laptop computers that were planned to be purchased in 2005 were equipped with wireless cards. Issues can arise in a supposedly non-wireless organization when a wireless laptop is plugged into the corporate network. A hacker could sit out in the parking lot and gather information from it through laptops and/or other devices, or even break in through this wireless card–equipped laptop and gain access to the wired network.