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Networking your business Information technology Directors’ Briefing
... wireless access point too (see 2.5). 2.5 You may require a wireless access point (AP). ...
... wireless access point too (see 2.5). 2.5 You may require a wireless access point (AP). ...
Microsoft PowerPoint Presentation: Lecture1.2
... the network medium (e.g., cables) and provides data link service to the higher layers. The Medium Access Control (MAC) layer defines who can use the network medium when multiple computers are trying to access it simultaneously. For example, token passing or CSMA/CD for Ethernet. ...
... the network medium (e.g., cables) and provides data link service to the higher layers. The Medium Access Control (MAC) layer defines who can use the network medium when multiple computers are trying to access it simultaneously. For example, token passing or CSMA/CD for Ethernet. ...
English
... communications between devices is encrypted. WirelessHART security prevents outsiders from eavesdropping or joining the network, and keeps insiders from monitoring information they do not have the authorization to access. In addition, multiple techniques ensure the availability and integrity of the ...
... communications between devices is encrypted. WirelessHART security prevents outsiders from eavesdropping or joining the network, and keeps insiders from monitoring information they do not have the authorization to access. In addition, multiple techniques ensure the availability and integrity of the ...
Architecting High-Security Systems for Multilateral
... classified networks from within a single system. Nonetheless, the separation of those networks is maintained at all times. As different networks are not necessarily under control of one single organisation, our workstation design Versatility – the strength of MILS involves a concept to distribute re ...
... classified networks from within a single system. Nonetheless, the separation of those networks is maintained at all times. As different networks are not necessarily under control of one single organisation, our workstation design Versatility – the strength of MILS involves a concept to distribute re ...
7. Medium Access Control Sublayer (17.3.) File
... MACA protocol grants access for A to send to B: • A sends RTS to B [left]; B replies with CTS [right] • A can send with exposed but no hidden terminals ...
... MACA protocol grants access for A to send to B: • A sends RTS to B [left]; B replies with CTS [right] • A can send with exposed but no hidden terminals ...
security in the post-Internet era
... more VoIP (and soon, VoWLAN) faster networks class action lawsuits RIAA subpoenas SEC filings to include security info? more sophisticated attacks more spyware, encrypted backdoors less sophisticated attackers profit motive for attacks ...
... more VoIP (and soon, VoWLAN) faster networks class action lawsuits RIAA subpoenas SEC filings to include security info? more sophisticated attacks more spyware, encrypted backdoors less sophisticated attackers profit motive for attacks ...
Chapter 6 slides, Computer Networking, 3rd edition
... Wireless, mobility: impact on higher layer protocols logically, impact should be minimal … ...
... Wireless, mobility: impact on higher layer protocols logically, impact should be minimal … ...
TCP/IP Networking and Remote Access
... – Multicast Scope – Assigns Class D addresses to clients ...
... – Multicast Scope – Assigns Class D addresses to clients ...
Router/Switch Security
... Verify that explicitly defined protocols allowed for incoming and outgoing sessions. Verify that access-class ACLs are used to control the sources from which sessions are going to be ...
... Verify that explicitly defined protocols allowed for incoming and outgoing sessions. Verify that access-class ACLs are used to control the sources from which sessions are going to be ...
Big Data Analytics: Online Condition Health Monitoring Nuclear Automation Background
... Plant-wide application to fleet-wide application This same technology can be applied to monitor multiple components within a plant and provide reliable data to a central data server for additional processing and analysis. Wireless technology eliminates the costs of new cable runs for added measureme ...
... Plant-wide application to fleet-wide application This same technology can be applied to monitor multiple components within a plant and provide reliable data to a central data server for additional processing and analysis. Wireless technology eliminates the costs of new cable runs for added measureme ...
lecture02
... • Can’t build a network by requiring all nodes to be directly connected to each other; need scalability with respect to the number of wires or the number of nodes that can attach to a shared medium ...
... • Can’t build a network by requiring all nodes to be directly connected to each other; need scalability with respect to the number of wires or the number of nodes that can attach to a shared medium ...
Networks - Burgate ICT
... saving time and money. 4. The back-up of data is done centrally by a network manager, daily or weekly, and copies kept for some time. - What are the consequences if left to ...
... saving time and money. 4. The back-up of data is done centrally by a network manager, daily or weekly, and copies kept for some time. - What are the consequences if left to ...
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 ...
... • 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 ...
network-concepts - Home - Websites and Software Solutions
... satellite links and similar channels. It is cheaper and more efficient to use the phone network for the link. Most WAN networks are used to transfer large blocks of data between its users. ...
... satellite links and similar channels. It is cheaper and more efficient to use the phone network for the link. Most WAN networks are used to transfer large blocks of data between its users. ...
Management Information Systems
... Bus topology When building large networks there is a problem if a limited length of cables between nodes, in this case, the network is divided into segments. Segments are connected by various devices - repeaters, concentrators or hubs. For example, the technology allows the use of Ethernet cable up ...
... Bus topology When building large networks there is a problem if a limited length of cables between nodes, in this case, the network is divided into segments. Segments are connected by various devices - repeaters, concentrators or hubs. For example, the technology allows the use of Ethernet cable up ...
04 – Future Ad Hoc Network
... wireless network. The Mobile Ad-hoc network is also a form of the wireless network. Compare and contrast the wireless mesh network and the Mobile Adhoc network that are the categories in the multi-hop wireless network ! ...
... wireless network. The Mobile Ad-hoc network is also a form of the wireless network. Compare and contrast the wireless mesh network and the Mobile Adhoc network that are the categories in the multi-hop wireless network ! ...
Networking and the Internet - Department of Mathematics and
... A device that receives packets from its input link, and then sorts them and transmits them over the proper link that connects to the node addressed. ...
... A device that receives packets from its input link, and then sorts them and transmits them over the proper link that connects to the node addressed. ...
Guide to Firewalls and Network Security with Intrusion Detection and
... Add complexity Require that you install and/or maintain a variety of firewalls ...
... Add complexity Require that you install and/or maintain a variety of firewalls ...
Linux+ Guide to Linux Certification
... • Link manager: Software that helps identify other Bluetooth devices, creates links between devices, and sends and receives data ...
... • Link manager: Software that helps identify other Bluetooth devices, creates links between devices, and sends and receives data ...
Users - Makerere University E
... Provides a way for different computing devices to work together, each doing the job for which it is best suited. The clients which are usually inexpensive PCs, share more expensive devices, the servers. Provides as many access points to data as there are PCs on the network. ...
... Provides a way for different computing devices to work together, each doing the job for which it is best suited. The clients which are usually inexpensive PCs, share more expensive devices, the servers. Provides as many access points to data as there are PCs on the network. ...
IEEE 802.15.3 - Computer and Information Science and Engineering
... access of data frames: avoid collisions of long data frames sender first transmits small request-to-send (RTS) packets to BS using CSMA RTS may still collide with each other (but they’re short) BS broadcasts clear-to-send (CTS) in response to RTS RTS heard by all nodes ...
... access of data frames: avoid collisions of long data frames sender first transmits small request-to-send (RTS) packets to BS using CSMA RTS may still collide with each other (but they’re short) BS broadcasts clear-to-send (CTS) in response to RTS RTS heard by all nodes ...
Lecture3
... connection between two network-layer entities • Two SA’s required for bidirectional secure communication • SA is specified by ...
... connection between two network-layer entities • Two SA’s required for bidirectional secure communication • SA is specified by ...
How Organizations Are Using Fortscale`s User Behavior Analytics
... A unique aspect of Fortscale is the ability to provide rich context for the analyst by automatically labeling users and machines based on many observed behaviors, helping analysts to quickly prioritize events for investigation. One account label applied is “service” which indicates an account whose ...
... A unique aspect of Fortscale is the ability to provide rich context for the analyst by automatically labeling users and machines based on many observed behaviors, helping analysts to quickly prioritize events for investigation. One account label applied is “service” which indicates an account whose ...
Wireless security
![](https://commons.wikimedia.org/wiki/Special:FilePath/ADSL_router_with_Wi-Fi_(802.11_b-g).jpg?width=300)
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.