HMI-20_2006-Plant-Security-Traceability-Electronic-Records
... • Ensure production and safety are not put at risk It is generally excepted that a firewall solution is the way to provide a connection between Enterprise Networks and Process Control • Maintain a secure network ...
... • Ensure production and safety are not put at risk It is generally excepted that a firewall solution is the way to provide a connection between Enterprise Networks and Process Control • Maintain a secure network ...
Telecommunication
... hardware devices connected together so users can share hardware, software, and data, and electronically communicate Networks range from small private networks to the Internet (largest network in the world) ...
... hardware devices connected together so users can share hardware, software, and data, and electronically communicate Networks range from small private networks to the Internet (largest network in the world) ...
The Internet as a Universal Communication Network
... “A cellular data network can provide relatively low-speed data service over a large coverage area. On the other hand, WLAN provides high-speed data service over a geographically small area. An integrated network combines the strengths of each.” Source:A. Salkintzis, C. Fors, R. Pazhyannur, Motorola, ...
... “A cellular data network can provide relatively low-speed data service over a large coverage area. On the other hand, WLAN provides high-speed data service over a geographically small area. An integrated network combines the strengths of each.” Source:A. Salkintzis, C. Fors, R. Pazhyannur, Motorola, ...
Connectivity - King Fahd University of Petroleum and Minerals
... Direct or indirect access to every other node in the network Connectivity is the magic needed to communicate if you do not have a link. ...
... Direct or indirect access to every other node in the network Connectivity is the magic needed to communicate if you do not have a link. ...
MOBILE/WIRELESS NETWORKS
... – not only a complex acronym, but also the heart of the channel access providing priorities and different access schemes. – divides the medium access of different competing nodes into ...
... – not only a complex acronym, but also the heart of the channel access providing priorities and different access schemes. – divides the medium access of different competing nodes into ...
Chapter 7
... • Only those who must use data should have access • The amount of access granted to someone should be limited to what that person needs to know • Limiting is more than placing a password on a system • Users should have the least amount of information necessary to do their jobs, and no more ...
... • Only those who must use data should have access • The amount of access granted to someone should be limited to what that person needs to know • Limiting is more than placing a password on a system • Users should have the least amount of information necessary to do their jobs, and no more ...
Networks_10
... standard that controls or enables the connection, communication and data transfer between computers on a network Contains rules governing the syntax, semantics and synchronization of communication May be implemented by hardware, software or a ...
... standard that controls or enables the connection, communication and data transfer between computers on a network Contains rules governing the syntax, semantics and synchronization of communication May be implemented by hardware, software or a ...
Chapter 8
... Key establishment IEEE 802.11 relies on preshared keys between the mobile nodes or stations (STAs) and the Access Points (APs). key establishment is outside the scope of WEP. The absence of any key management protocol led to multiple problem. Anonymity However, given the IP address, it is extremel ...
... Key establishment IEEE 802.11 relies on preshared keys between the mobile nodes or stations (STAs) and the Access Points (APs). key establishment is outside the scope of WEP. The absence of any key management protocol led to multiple problem. Anonymity However, given the IP address, it is extremel ...
Chapter 1: Security Problems in Computing
... insurance company stored all of its customer information on magnetic tapes. One day, the tapes were stolen as they were being transferred to another location. The thief called the insurance company and demanded a ransom for the tapes, otherwise he would destroy them. He was told to do as he pleased ...
... insurance company stored all of its customer information on magnetic tapes. One day, the tapes were stolen as they were being transferred to another location. The thief called the insurance company and demanded a ransom for the tapes, otherwise he would destroy them. He was told to do as he pleased ...
Networks Adrian Janson
... standard that controls or enables the connection, communication and data transfer between computers on a network Contains rules governing the syntax, semantics and synchronization of communication May be implemented by hardware, software or a ...
... standard that controls or enables the connection, communication and data transfer between computers on a network Contains rules governing the syntax, semantics and synchronization of communication May be implemented by hardware, software or a ...
Networks
... Transmission Control Protocol and Internet Protocol Origin information Destination information Sequence information Data/information/instructions ...
... Transmission Control Protocol and Internet Protocol Origin information Destination information Sequence information Data/information/instructions ...
Analysis of a Clock Synchronization Protocol for Wireless Sensor
... We claim that for a line network of size N, the guard time g should be at least N. We consider only networks with perfect clocks, in which clock drift is zero. ...
... We claim that for a line network of size N, the guard time g should be at least N. We consider only networks with perfect clocks, in which clock drift is zero. ...
Computer Networks, Tanenbaum 2
... a communication subnet. Subnet consists of two distinct components: transmission lines and switching elements. Transmission lines can be copper wire, optical fiber, or even radio links. Switching elements are specialized computers that connect three or more transmission lines. When data arrive on an ...
... a communication subnet. Subnet consists of two distinct components: transmission lines and switching elements. Transmission lines can be copper wire, optical fiber, or even radio links. Switching elements are specialized computers that connect three or more transmission lines. When data arrive on an ...
JOB DESCRIPTION NETWORK ADMINISTRATOR
... • Certification in network operating system’s software, other appropriate hardware certifications such as Cisco, or any equivalent combination of training, certification, and/or experience which provides the required knowledge, skills, and abilities. • Strong knowledge of server planning and enginee ...
... • Certification in network operating system’s software, other appropriate hardware certifications such as Cisco, or any equivalent combination of training, certification, and/or experience which provides the required knowledge, skills, and abilities. • Strong knowledge of server planning and enginee ...
Slides.
... System design should be public Default should be no access Check for current authority Give each process least privilege possible Protection mechanism should be ...
... System design should be public Default should be no access Check for current authority Give each process least privilege possible Protection mechanism should be ...
Modul – 4 Sistem Telepon
... that the terminal accesses, e.g. Internet, PSTN, etc.). – Radio transmission technology: access technique (TDMA, CDMA, etc.), modulation technique (analogue, digital, etc.), duplex technique (FDD, TDD, etc.), etc. – Delivery mechanism: terrestrial, satellite, etc. TE-09-1313-04-Telepon ...
... that the terminal accesses, e.g. Internet, PSTN, etc.). – Radio transmission technology: access technique (TDMA, CDMA, etc.), modulation technique (analogue, digital, etc.), duplex technique (FDD, TDD, etc.), etc. – Delivery mechanism: terrestrial, satellite, etc. TE-09-1313-04-Telepon ...
CEN-WAP-ABG-1G
... The CEN-WAP-ABG-1G is a wireless access point that supports IEEE 802.11a/b/g Wi-Fi technology. In addition, the CEN-WAP-ABG-1G supports the IEEE 802.3af Power over Ethernet (PoE) industry standard. Using PoE technology, the CEN-WAP-ABG-1G receives both power and data by way of a single Ethernet cabl ...
... The CEN-WAP-ABG-1G is a wireless access point that supports IEEE 802.11a/b/g Wi-Fi technology. In addition, the CEN-WAP-ABG-1G supports the IEEE 802.3af Power over Ethernet (PoE) industry standard. Using PoE technology, the CEN-WAP-ABG-1G receives both power and data by way of a single Ethernet cabl ...
FX3510401044
... Our proposed framework based on three sorts of networks such as: MANET (Mobile Ad Hoc Network) [8], WSN (Wireless Sensor Network)[1] [13] and WMN (Wireless Mesh Network) [2] [9]. It is a propose specially designed for transporting and sharing of information among users (like voluntary workers and fi ...
... Our proposed framework based on three sorts of networks such as: MANET (Mobile Ad Hoc Network) [8], WSN (Wireless Sensor Network)[1] [13] and WMN (Wireless Mesh Network) [2] [9]. It is a propose specially designed for transporting and sharing of information among users (like voluntary workers and fi ...
MANET - International Journal of Application or Innovation in
... Another appropriate local level application might be in home networks where devices can communicate directly to exchange information. Similarly in other civilian environments like taxicab, sports stadium, boat and small aircraft, mobile ad hoc communications will have many applications. Personal Are ...
... Another appropriate local level application might be in home networks where devices can communicate directly to exchange information. Similarly in other civilian environments like taxicab, sports stadium, boat and small aircraft, mobile ad hoc communications will have many applications. Personal Are ...
Convergence
... Carriers with Facilities • Constructing new networks too expensive • Switches are now connected to networks • Carriers with switches buy exclusive access to fiber optic channels – Indefeasible Right to Use (IRU) – carrier purchases the rights to a set number of fiber strands from owners of fiber ne ...
... Carriers with Facilities • Constructing new networks too expensive • Switches are now connected to networks • Carriers with switches buy exclusive access to fiber optic channels – Indefeasible Right to Use (IRU) – carrier purchases the rights to a set number of fiber strands from owners of fiber ne ...
NW PPT - Dublin City Schools
... Fiber optic cable – used by much of the internet to send data quickly over long distances underground ...
... Fiber optic cable – used by much of the internet to send data quickly over long distances underground ...
Chapter 10 Exercises
... from one another by speed: 10-Mbps Ethernet, 100-Mbps or Fast Ethernet, and Gigabit and 10-Gigabit Ethernet. Ethernet uses UTP, STP, or coaxial cable. Ethernet networks can be configured using either a bus or a star topology with a hub. Token ring is an older LAN technology, which controls access to ...
... from one another by speed: 10-Mbps Ethernet, 100-Mbps or Fast Ethernet, and Gigabit and 10-Gigabit Ethernet. Ethernet uses UTP, STP, or coaxial cable. Ethernet networks can be configured using either a bus or a star topology with a hub. Token ring is an older LAN technology, which controls access to ...
Module 6 - ITE technical support
... Ethernet is the most common local area networking standard for wired networks. Ethernet can use copper and fiber optic cables. Ethernet uses network interface cards, hubs, switches, and routers to connect devices. Wireless networking uses radio waves for sending network data within a local area netw ...
... Ethernet is the most common local area networking standard for wired networks. Ethernet can use copper and fiber optic cables. Ethernet uses network interface cards, hubs, switches, and routers to connect devices. Wireless networking uses radio waves for sending network data within a local area netw ...
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.