NETWORKS
... • Use radio waves and/or microwaves to maintain communication channels between computers • The data is beamed out over the airwaves • Advantages of wireless include mobility and elimination of unsightly cables Networks ...
... • Use radio waves and/or microwaves to maintain communication channels between computers • The data is beamed out over the airwaves • Advantages of wireless include mobility and elimination of unsightly cables Networks ...
ch04-Networking
... This address will be compared to the subnet mask (Ex: 255.55.66.x), indicating that this computer is on different Subnet. Any messages going outside the subnet must be sent to the Gateway TCP/IP then searches its address table and find the data link layer address of the Gateway (00-34-R5-63-4R ...
... This address will be compared to the subnet mask (Ex: 255.55.66.x), indicating that this computer is on different Subnet. Any messages going outside the subnet must be sent to the Gateway TCP/IP then searches its address table and find the data link layer address of the Gateway (00-34-R5-63-4R ...
Security The big picture Some consequences Three types of threat
... - Advertise a short IP address prefix (e.g., 61.0.0.0/8) - Because of longest-prefix matching, will not disturb legitimate users with longer prefixes (e.g., 61.33.0.0/16) - Send SPAM from unused IP addresses in range (which will get routed back to you) - Withdraw route advertisement ...
... - Advertise a short IP address prefix (e.g., 61.0.0.0/8) - Because of longest-prefix matching, will not disturb legitimate users with longer prefixes (e.g., 61.33.0.0/16) - Send SPAM from unused IP addresses in range (which will get routed back to you) - Withdraw route advertisement ...
Portfolio
... the Internet, but that does so on behalf of some set of endpoint nodes. The overlay is implemented by a software layer that itself uses standard Internet functionality (TCP/IP, UDP, etc). However, applications running “over” the overlay have access to special advantages that normal Internet communic ...
... the Internet, but that does so on behalf of some set of endpoint nodes. The overlay is implemented by a software layer that itself uses standard Internet functionality (TCP/IP, UDP, etc). However, applications running “over” the overlay have access to special advantages that normal Internet communic ...
IEEE802.11 Wireless LAN Standard
... for access to the same shared wireless medium. A BSS may be isolated or connected to a backbone distribution system (DS) through an access point (AP). The access point functions as a bridge. The BSS generally corresponds to what is referred to as a cell in the literature. The DS can be a switch, a w ...
... for access to the same shared wireless medium. A BSS may be isolated or connected to a backbone distribution system (DS) through an access point (AP). The access point functions as a bridge. The BSS generally corresponds to what is referred to as a cell in the literature. The DS can be a switch, a w ...
William Stallings, Cryptography and Network Security 3/e
... improve the performance of their Telnet sessions to and from the router. When using a standard TCP implementation to send keystrokes between machines, TCP tends to send one packet for each keystroke typed. On larger networks, many small packets use up bandwidth and contribute to congestion. John Nag ...
... improve the performance of their Telnet sessions to and from the router. When using a standard TCP implementation to send keystrokes between machines, TCP tends to send one packet for each keystroke typed. On larger networks, many small packets use up bandwidth and contribute to congestion. John Nag ...
Lecture1
... of subjects to objects are in accordance with a security policy. To determine whether a specific access mode is allowed, the clearance of a subject is compared to the classification of the object (more precisely, to the combination of classification and set of compartments, making up the security le ...
... of subjects to objects are in accordance with a security policy. To determine whether a specific access mode is allowed, the clearance of a subject is compared to the classification of the object (more precisely, to the combination of classification and set of compartments, making up the security le ...
Presentation
... Maintenance, Backups and Software Updates can all be done much more cost effectively from the central administrative building. Schools are able to explore new high-end applications such as video conference & Voice over IP. ...
... Maintenance, Backups and Software Updates can all be done much more cost effectively from the central administrative building. Schools are able to explore new high-end applications such as video conference & Voice over IP. ...
DEEPWAVE Christchurch Operations Center Computer Network
... Wireless access will be granted by entering a password. The wireless password uses WPA2 encryption. To get this password, please see a member of the Ops support team. The DEEPWAVE wireless network is “OPS”. Wired access to the DEEPWAVE network is unrestricted. You will not need a password or any oth ...
... Wireless access will be granted by entering a password. The wireless password uses WPA2 encryption. To get this password, please see a member of the Ops support team. The DEEPWAVE wireless network is “OPS”. Wired access to the DEEPWAVE network is unrestricted. You will not need a password or any oth ...
Security - Computer Science Department
... – Become familiar with basic acronyms (RSA, SSL, PGP, etc.), and “buzzwords” (phishing, …) – Become an educated security consumer – Try to keep it interesting with real-world examples and ...
... – Become familiar with basic acronyms (RSA, SSL, PGP, etc.), and “buzzwords” (phishing, …) – Become an educated security consumer – Try to keep it interesting with real-world examples and ...
Computer and Networking Security
... – Use wireless network scanning software to test the network security. – Require that wireless clients use a VPN (virtual private network) tunnel to access the access point and wireless network. © 2011 Pearson Addison-Wesley. All rights reserved. ...
... – Use wireless network scanning software to test the network security. – Require that wireless clients use a VPN (virtual private network) tunnel to access the access point and wireless network. © 2011 Pearson Addison-Wesley. All rights reserved. ...
Detecting service violation in Internet and Mobile ad hoc networks
... state maintenance is negligible. • Very few tasks need to be performed in each state (outlined in the tech report). • Flexible – there could be multiple VHAs in the same LAN and a MHA could be a BHA for another VHA, a BHA could be a BHA for more than one VHA at the same time. [Bhargava et al, Intern ...
... state maintenance is negligible. • Very few tasks need to be performed in each state (outlined in the tech report). • Flexible – there could be multiple VHAs in the same LAN and a MHA could be a BHA for another VHA, a BHA could be a BHA for more than one VHA at the same time. [Bhargava et al, Intern ...
AirLive AC.TOP Manual
... wireless network. All wireless cards and clients connect and communicate through AC.TOP. This type of network is known as “Infrastructure Network”. Other AC.TOP or 802.11b/g/n device can connect to AP mode through “Client Mode”. ...
... wireless network. All wireless cards and clients connect and communicate through AC.TOP. This type of network is known as “Infrastructure Network”. Other AC.TOP or 802.11b/g/n device can connect to AP mode through “Client Mode”. ...
Adhoc NUC - The Astrophotography Manual
... Intelligent Capture PC Hub (Chris Woodhouse www.digitalastrophotography.co.uk) With the advent of the Intel NUC series of PC's, a fully functional Windows unit, approximately 4" square and consuming less than 10W makes the prospect of a reliable and portable image acquisition system a reality. Coupl ...
... Intelligent Capture PC Hub (Chris Woodhouse www.digitalastrophotography.co.uk) With the advent of the Intel NUC series of PC's, a fully functional Windows unit, approximately 4" square and consuming less than 10W makes the prospect of a reliable and portable image acquisition system a reality. Coupl ...
CIST 1601 Information Security Fundamentals
... Confidentiality is the minimum level of secrecy that is maintained to protect sensitive information from unauthorized disclosure. In many instances, laws and regulations require specific information confidentiality. Confidentiality can be implemented through encryption, access control data classific ...
... Confidentiality is the minimum level of secrecy that is maintained to protect sensitive information from unauthorized disclosure. In many instances, laws and regulations require specific information confidentiality. Confidentiality can be implemented through encryption, access control data classific ...
Wireless LANs - College of DuPage
... sending and receiving RF signals is the wireless NIC. –Like an Ethernet NIC, the wireless NIC, using the modulation technique it is configured to use, encodes a data stream onto an RF signal. –Wireless NICs are most often associated with mobile devices, such as laptop computers. –In the 1990s , wire ...
... sending and receiving RF signals is the wireless NIC. –Like an Ethernet NIC, the wireless NIC, using the modulation technique it is configured to use, encodes a data stream onto an RF signal. –Wireless NICs are most often associated with mobile devices, such as laptop computers. –In the 1990s , wire ...
Network Policy Management Software Blade
... are unified with a consistent usage making it easy for customers to manage existing and new security functions. Network Policy Management is based on a central repository of rules, profiles and objects required for building security policies. The central repository model simplifies creating, tuning ...
... are unified with a consistent usage making it easy for customers to manage existing and new security functions. Network Policy Management is based on a central repository of rules, profiles and objects required for building security policies. The central repository model simplifies creating, tuning ...
Chapter 13 Network Management Applications
... • Disclosure does not require interception of message • Denial of service and traffic analysis are not considered as threats. ...
... • Disclosure does not require interception of message • Denial of service and traffic analysis are not considered as threats. ...
The role of SDN and OpenFlow in Mesh Network
... interfaces. One interface provides network access for users and other interface acts as a backbone to keep mesh network up and running. By running wireless mesh we can provides internet access into the large area such as university campus. SDN controller acts as a network brain but generated extra p ...
... interfaces. One interface provides network access for users and other interface acts as a backbone to keep mesh network up and running. By running wireless mesh we can provides internet access into the large area such as university campus. SDN controller acts as a network brain but generated extra p ...
Firewalls - Eastern Michigan University
... Screen packets coming into the Privet Networks from external, Untrusted Networks (Internet) Ingress Packet Filtering Firewall examine incoming packet and either pass or drop (deny) the packet ...
... Screen packets coming into the Privet Networks from external, Untrusted Networks (Internet) Ingress Packet Filtering Firewall examine incoming packet and either pass or drop (deny) the packet ...
Cost Efficient Algorithms for FiWi Access Network
... devices UEs located at individual location can connect to FiWi network. Finally, packets received from wireless gateway will go through the back-end PON and arrive at OLT, where they will be injected into Internet. In such way, FiWi enables UEs to access Internet with better flexibility and larger c ...
... devices UEs located at individual location can connect to FiWi network. Finally, packets received from wireless gateway will go through the back-end PON and arrive at OLT, where they will be injected into Internet. In such way, FiWi enables UEs to access Internet with better flexibility and larger c ...
Computer Network
... LAN: This network is within a very limited area like an office building, a school, or a home. It is simpler and cheaper than other network. In a typical LAN there is a server which consist additional software and hardware. A LAN is useful for sharing resources like files, printers, games or other ap ...
... LAN: This network is within a very limited area like an office building, a school, or a home. It is simpler and cheaper than other network. In a typical LAN there is a server which consist additional software and hardware. A LAN is useful for sharing resources like files, printers, games or other ap ...
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.