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Linux+ Guide to Linux Certification
... • Network adapters come in a variety of types depending on access method, network transmission speed, connector interfaces, type of compatible motherboard, and manufacturer • Desktops or tower PCs may use an expansion card NIC, which must match the system’s bus • NICs are designed to be used with ei ...
... • Network adapters come in a variety of types depending on access method, network transmission speed, connector interfaces, type of compatible motherboard, and manufacturer • Desktops or tower PCs may use an expansion card NIC, which must match the system’s bus • NICs are designed to be used with ei ...
Public Key Encryption and Digital Signatures
... • Encryption – Simple or more complex substitutions – Key based approaches require secure ways to transmit a key – Public Key encryption • does not require communication of a key • security depends on the difficulty of factoring very large numbers (hundreds of digits) ...
... • Encryption – Simple or more complex substitutions – Key based approaches require secure ways to transmit a key – Public Key encryption • does not require communication of a key • security depends on the difficulty of factoring very large numbers (hundreds of digits) ...
Unit 3 - NIST NACOL
... one client to others via server. Server is responsible (or broadcasting the messages to the entire network. Suppose client 1 wants to send some message to Client 4, then firstly message is sent to the server. The server broadcasts the message along with source II' address and destination IP address ...
... one client to others via server. Server is responsible (or broadcasting the messages to the entire network. Suppose client 1 wants to send some message to Client 4, then firstly message is sent to the server. The server broadcasts the message along with source II' address and destination IP address ...
lan
... contains A-to-B IP datagram • A’s data link layer sends frame • R’s data link layer receives frame • R removes IP datagram from Ethernet frame, sees its destined to B • R uses ARP to get B’s physical layer address • R creates frame containing A-to-B IP datagram sends to B ...
... contains A-to-B IP datagram • A’s data link layer sends frame • R’s data link layer receives frame • R removes IP datagram from Ethernet frame, sees its destined to B • R uses ARP to get B’s physical layer address • R creates frame containing A-to-B IP datagram sends to B ...
Chapter 1
... • A potential danger to information or a system • An example: the ability to gain unauthorized access to systems or information in order to commit fraud, network intrusion, industrial espionage, identity theft, or simply to disrupt the system or network • There may be weaknesses that greatly increas ...
... • A potential danger to information or a system • An example: the ability to gain unauthorized access to systems or information in order to commit fraud, network intrusion, industrial espionage, identity theft, or simply to disrupt the system or network • There may be weaknesses that greatly increas ...
- Whatcom Community College
... These work by either eliminating or diminishing the likelihood that the negative event will occur, or by eliminating or diminishing the impact of its occurrence on the system. Risk management decisions are generally framed by the cost to control the risks versus the cost of the negative event. Such ...
... These work by either eliminating or diminishing the likelihood that the negative event will occur, or by eliminating or diminishing the impact of its occurrence on the system. Risk management decisions are generally framed by the cost to control the risks versus the cost of the negative event. Such ...
Document
... • Many ICS have poor authentication mechanisms and very limited authorization mechanisms • Many protocols use cleartext passwords • Many ICS devices lack crypto support • Sometimes passwords left at vendor default • Device passwords are hard to manage appropriately – Often one password is shared amo ...
... • Many ICS have poor authentication mechanisms and very limited authorization mechanisms • Many protocols use cleartext passwords • Many ICS devices lack crypto support • Sometimes passwords left at vendor default • Device passwords are hard to manage appropriately – Often one password is shared amo ...
slides - Fei Hu
... • Many ICS have poor authentication mechanisms and very limited authorization mechanisms • Many protocols use cleartext passwords • Many ICS devices lack crypto support • Sometimes passwords left at vendor default • Device passwords are hard to manage appropriately – Often one password is shared amo ...
... • Many ICS have poor authentication mechanisms and very limited authorization mechanisms • Many protocols use cleartext passwords • Many ICS devices lack crypto support • Sometimes passwords left at vendor default • Device passwords are hard to manage appropriately – Often one password is shared amo ...
cired experimental evaluation of cyber intrusions into highly critical
... as redundant systems and channels, firewalls, virtual private networks, intrusion detection systems, secure application protocols, antivirus, communication monitoring. The experiments concern cyber threats to those ICT network components, such as gateways and SCADA (Supervisory Control And Data Acqu ...
... as redundant systems and channels, firewalls, virtual private networks, intrusion detection systems, secure application protocols, antivirus, communication monitoring. The experiments concern cyber threats to those ICT network components, such as gateways and SCADA (Supervisory Control And Data Acqu ...
IT REPORT TIMEHIN
... management information in a circuit-switched (e.g., the PSTN) network. It is initiated by the calling subscriber (user) going off-hook. It means “the action of taking the telephone instrument out of its cradle.” Two little knobs in the cradle pop up, pushed by a spring action causing an electrical c ...
... management information in a circuit-switched (e.g., the PSTN) network. It is initiated by the calling subscriber (user) going off-hook. It means “the action of taking the telephone instrument out of its cradle.” Two little knobs in the cradle pop up, pushed by a spring action causing an electrical c ...
Zigbee_Intro_v5 - University of Virginia, Department of Computer
... • Targeted for home automation • Originally used power lines as transmission media. Later RF communication was added. • Mainly used to transmit a few codes to turn on or off other devices, aka. Remote control. • Very simple protocol – 4-bit house code (group address) – 4-bit unit code (device addres ...
... • Targeted for home automation • Originally used power lines as transmission media. Later RF communication was added. • Mainly used to transmit a few codes to turn on or off other devices, aka. Remote control. • Very simple protocol – 4-bit house code (group address) – 4-bit unit code (device addres ...
Overlay Networks
... Overlay Networks A logical network built on top of a physical network Overlay links are tunnels through the underlying network Many logical networks may coexist at once Over the same underlying network And providing its own particular service Nodes are often end hosts Acting as interm ...
... Overlay Networks A logical network built on top of a physical network Overlay links are tunnels through the underlying network Many logical networks may coexist at once Over the same underlying network And providing its own particular service Nodes are often end hosts Acting as interm ...
IOSR Journal of Computer Engineering (IOSR-JCE)
... it wants to intercept. Once the malicious node has been able to insert itself between the communicating nodes, it can do anything with the packets passing between them. It can then choose to drop the packets thereby creating a DoS. 2. Impersonation Attacks More generally known as „spoofing‟, since t ...
... it wants to intercept. Once the malicious node has been able to insert itself between the communicating nodes, it can do anything with the packets passing between them. It can then choose to drop the packets thereby creating a DoS. 2. Impersonation Attacks More generally known as „spoofing‟, since t ...
Final presentation
... a complete block to IP traffic between the Internet and protected site. Proxy servers on the gateway provide services and access Provide proxy service for Telnet and Ftp as well as e-mail service which f irewall can accept all site mails and forward to system. Log access and log attempts or fi ...
... a complete block to IP traffic between the Internet and protected site. Proxy servers on the gateway provide services and access Provide proxy service for Telnet and Ftp as well as e-mail service which f irewall can accept all site mails and forward to system. Log access and log attempts or fi ...
Sun Microsystems
... Microsystems, Inc. to its position as a leading provider of industrial-strength hardware, software and services that make the Net work. Sun can be found in more than 100 countries and on the World Wide Web at http://sun.com. BUSINESS CHALLENGE The virtual enterprise is quickly becoming a reality as ...
... Microsystems, Inc. to its position as a leading provider of industrial-strength hardware, software and services that make the Net work. Sun can be found in more than 100 countries and on the World Wide Web at http://sun.com. BUSINESS CHALLENGE The virtual enterprise is quickly becoming a reality as ...
Part I: Introduction
... Who might Bob, Alice be? … well, real-life Bobs and Alices! Web browser/server for electronic transactions (e.g., on-line purchases) on-line banking client/server DNS servers routers exchanging routing table updates other examples? ...
... Who might Bob, Alice be? … well, real-life Bobs and Alices! Web browser/server for electronic transactions (e.g., on-line purchases) on-line banking client/server DNS servers routers exchanging routing table updates other examples? ...
CZ25599604
... often been avoided by most secure routing protocols by assuming that the nodes should be trusted once authenticated. This is, unfortunately, not the case for real-world environments. Second, what kind of authentication and key management schemes are needed to dynamically maintain a trustworthy topol ...
... often been avoided by most secure routing protocols by assuming that the nodes should be trusted once authenticated. This is, unfortunately, not the case for real-world environments. Second, what kind of authentication and key management schemes are needed to dynamically maintain a trustworthy topol ...
installation and user manual
... The Fleet tab is where you activate your GL45-3G units, please refer to Page 22 “Activating a GL45-3G” of this manual for detailed instructions. The icon ( ) to the left of every column is a shortcut to ping a unit, clicking on this icon will ping the unit and take you directly to the Ping Page. You ...
... The Fleet tab is where you activate your GL45-3G units, please refer to Page 22 “Activating a GL45-3G” of this manual for detailed instructions. The icon ( ) to the left of every column is a shortcut to ping a unit, clicking on this icon will ping the unit and take you directly to the Ping Page. You ...
www.acotserver.com
... • Operate at OSI model layer 2 (Data-Link) Computer Networking From LANs to WANs: Hardware, Software, and Security ...
... • Operate at OSI model layer 2 (Data-Link) Computer Networking From LANs to WANs: Hardware, Software, and Security ...
3GPP2 “Evolving to Future Wireless Technology”
... Network comprising a variety of interworking access systems connected to a common packet-based core network Various access systems (e.g. 3G cellular, a new radio Interface, W-LAN, Short range radio, and wired access, etc.) will be connected via flexible core networks. User can be connected via a ...
... Network comprising a variety of interworking access systems connected to a common packet-based core network Various access systems (e.g. 3G cellular, a new radio Interface, W-LAN, Short range radio, and wired access, etc.) will be connected via flexible core networks. User can be connected via a ...
Distributed Coverage and Capacity Solutions Brochure
... We don’t simply solve coverage and capacity challenges. We solve them in the most effective and efficient way possible, applying our expertise and advanced technology to build solutions that address connectivity, energy use, maintenance costs, and long-term adaptability. Unlike other industry suppli ...
... We don’t simply solve coverage and capacity challenges. We solve them in the most effective and efficient way possible, applying our expertise and advanced technology to build solutions that address connectivity, energy use, maintenance costs, and long-term adaptability. Unlike other industry suppli ...
transparencies - Indico
... – Both to and from machine – Several ways to do this • Assuming static port number - block port • Limited outside connections – restrict IP addresses • Limited services – block all ports by default ...
... – Both to and from machine – Several ways to do this • Assuming static port number - block port • Limited outside connections – restrict IP addresses • Limited services – block all ports by default ...
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.