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... If N knows a better route for a network known by both, R’s routing table is updated Metric (# of hops) is increased by one Update messages tx to neighbours. Two ways • Not using split horizon technique: Updates are sent to all the neighbours. • Using split horizon technique. Updates sent to al ...
... If N knows a better route for a network known by both, R’s routing table is updated Metric (# of hops) is increased by one Update messages tx to neighbours. Two ways • Not using split horizon technique: Updates are sent to all the neighbours. • Using split horizon technique. Updates sent to al ...
Green Wave: Latency and Capacity-Efficient Sleep Scheduling for
... An efficient sleep schedule not only seeks to minimize idle listening, but also to optimize the performance of wireless networks (e.g. latency, capacity) subject to a certain constraint of energy consumption level. This work considers receiverbased sleep scheduling (i.e., the active state of a node ...
... An efficient sleep schedule not only seeks to minimize idle listening, but also to optimize the performance of wireless networks (e.g. latency, capacity) subject to a certain constraint of energy consumption level. This work considers receiverbased sleep scheduling (i.e., the active state of a node ...
sensor networks - BWN-Lab
... (W. R. Heinzelman, A. Chandrakasan, and H. Balakrishnan, “Energy-Efficient Communication Protocol for Wireless Microsensor Networks,'' IEEE Proceedings of the Hawaii International Conference on System Sciences, pp. 1-10, January, 2000.) ...
... (W. R. Heinzelman, A. Chandrakasan, and H. Balakrishnan, “Energy-Efficient Communication Protocol for Wireless Microsensor Networks,'' IEEE Proceedings of the Hawaii International Conference on System Sciences, pp. 1-10, January, 2000.) ...
Measurement-based models enable predictable wireless behavior
... of new protocols on testbeds Hard to say if results generalize The lack of predictability remains • Unless all possible configurations are tested ...
... of new protocols on testbeds Hard to say if results generalize The lack of predictability remains • Unless all possible configurations are tested ...
Lab 12A: Intrusion Detection System (IDS)
... proxies, and are designed to understand protocols at this level, such as HTTP or telnet. Application gateways are useful because they can offer very high level control over traffic, and so they are in some ways more secure than screening routers. For example, an application gateway may choose to fil ...
... proxies, and are designed to understand protocols at this level, such as HTTP or telnet. Application gateways are useful because they can offer very high level control over traffic, and so they are in some ways more secure than screening routers. For example, an application gateway may choose to fil ...
IPv6 Security Aspects
... Authentication Header(AH) • Data integrity • Data authentication • Anti-replay protection Next Header ...
... Authentication Header(AH) • Data integrity • Data authentication • Anti-replay protection Next Header ...
An Introduction to SSH Secure Shell
... Key fingerprint = AF19 FA27 2F94 998D FDB5 DE3D F8B5 06E4 A169 4E46 • Trojan horses: Trojans are programs that masquerade as normal programs on an unsuspecting host but instead contain code designed to break into a system. SSH authentication happens on both ends of a connection and therefore, for pr ...
... Key fingerprint = AF19 FA27 2F94 998D FDB5 DE3D F8B5 06E4 A169 4E46 • Trojan horses: Trojans are programs that masquerade as normal programs on an unsuspecting host but instead contain code designed to break into a system. SSH authentication happens on both ends of a connection and therefore, for pr ...
Era of Spybots - A Secure Design Solution Using
... The vulnerability is triggered using what is known as Type 10 messages, specifically when issuing the COM_FORWARD_LOG (0x24) command. By supplying a backslash character within the ...
... The vulnerability is triggered using what is known as Type 10 messages, specifically when issuing the COM_FORWARD_LOG (0x24) command. By supplying a backslash character within the ...
Figure 5-3
... • Perform the following tasks: – Log in to your partner’s computer as root – Execute the ps aux command on your partner’s computer without logging in to his or her computer – Copy the /etc/hosts file from your partner’s computer to your /tmp directory – Copy the /etc/hosts file from your computer to ...
... • Perform the following tasks: – Log in to your partner’s computer as root – Execute the ps aux command on your partner’s computer without logging in to his or her computer – Copy the /etc/hosts file from your partner’s computer to your /tmp directory – Copy the /etc/hosts file from your computer to ...
N150 Wireless ADSL2+ Modem Router DGN1000 User Manual 350 East Plumeria Drive
... Enable Security Event Email Notification . . . . . . . . . . . . . . . . . . . . . . . . . . 56 ...
... Enable Security Event Email Notification . . . . . . . . . . . . . . . . . . . . . . . . . . 56 ...
ppt - The Fengs
... multiple attacking hosts – Easy to thwart • Vary source of attack by altering frequency of packets • Attack from many sources • Still can’t turn attacker’s off…Must notify upstream ISP to stop ...
... multiple attacking hosts – Easy to thwart • Vary source of attack by altering frequency of packets • Attack from many sources • Still can’t turn attacker’s off…Must notify upstream ISP to stop ...
slides - The Fengs
... multiple attacking hosts – Easy to thwart • Vary source of attack by altering frequency of packets • Attack from many sources • Still can’t turn attacker’s off…Must notify upstream ISP to stop ...
... multiple attacking hosts – Easy to thwart • Vary source of attack by altering frequency of packets • Attack from many sources • Still can’t turn attacker’s off…Must notify upstream ISP to stop ...
IP DSLAM with Integrated ATM Aggregation and Interworking
... and enable higher speed Broadband Services. In a traditional high speed internet infrastructure, DSL services are provided via ATM based DSLAMs. These DSLAMs are aggregated by ATM switches/routers which are expensive to maintain as many of them are in an End of Life state or nearing it. In addition, ...
... and enable higher speed Broadband Services. In a traditional high speed internet infrastructure, DSL services are provided via ATM based DSLAMs. These DSLAMs are aggregated by ATM switches/routers which are expensive to maintain as many of them are in an End of Life state or nearing it. In addition, ...
ch_01_Network_Overview - Faculty Web Hosting
... •Designed for a single office, campus, building or between nearby ...
... •Designed for a single office, campus, building or between nearby ...
Wireless A to Z
... Of all the communications services available today, wireless services are having the most dramatic impact on our personal and professional lives, enhancing personal productivity, mobility, and security. With every new wireless product and service, the boundary between home and office is blurred furt ...
... Of all the communications services available today, wireless services are having the most dramatic impact on our personal and professional lives, enhancing personal productivity, mobility, and security. With every new wireless product and service, the boundary between home and office is blurred furt ...
TCP for wireless links
... The algorithm for TCP congestion control is the main reason we can use the Internet successfully today despite largely unpredictable user access patterns and despite resource bottlenecks and limitations. Without TCP congestion control, the Internet could have become history a long time ago. ...
... The algorithm for TCP congestion control is the main reason we can use the Internet successfully today despite largely unpredictable user access patterns and despite resource bottlenecks and limitations. Without TCP congestion control, the Internet could have become history a long time ago. ...
3rd Edition: Chapter 4 - Northwestern Networks Group
... received at router running DHCP server Ethernet demuxed to IP demuxed, UDP demuxed to ...
... received at router running DHCP server Ethernet demuxed to IP demuxed, UDP demuxed to ...
KillerBee: Practical ZigBee Exploitation Framework or "Hacking the
... devices must have key stored in flash • When device boots, key is moved to RAM • Leverage device to retrieve encryption key, access network or decrypt all traffic This is not unlike WPA2-PSK networks, where each device has knowledge of the key. A compromised device is a compromised network. No key r ...
... devices must have key stored in flash • When device boots, key is moved to RAM • Leverage device to retrieve encryption key, access network or decrypt all traffic This is not unlike WPA2-PSK networks, where each device has knowledge of the key. A compromised device is a compromised network. No key r ...
Cloud-RAN Deployment with CPRI Fronthaul Technology
... for wireless internet services may challenge the available capacity of macro cells. By positioning additional RRU in these hotspots, the wireless internet traffic can be offloaded from macro cells. DAS is not a new technology; it has been deployed in many indoor applications. DAS refers to a network ...
... for wireless internet services may challenge the available capacity of macro cells. By positioning additional RRU in these hotspots, the wireless internet traffic can be offloaded from macro cells. DAS is not a new technology; it has been deployed in many indoor applications. DAS refers to a network ...
The Blaster Worm: Then and Now
... systems can choose to watch traffic directly via fiber taps or span ports, or watch data abstractions, such as flow records, device alerts, or logs. Security devices are an important source of these abstractions; alerts and logs from host-based antivirus programs, intrusion-detection systems, and fi ...
... systems can choose to watch traffic directly via fiber taps or span ports, or watch data abstractions, such as flow records, device alerts, or logs. Security devices are an important source of these abstractions; alerts and logs from host-based antivirus programs, intrusion-detection systems, and fi ...
Multihomed Mobile Network Architecture
... The IETF has been working on the concept of network mobility and developed a basic mobility support solution, known as NEMO Basic Support (NEMO BS) [1]. It provides a roaming Mobile Network of a group of nodes, referred to as Mobile Network Nodes (MNNs), with mobility support managed by its Mobile R ...
... The IETF has been working on the concept of network mobility and developed a basic mobility support solution, known as NEMO Basic Support (NEMO BS) [1]. It provides a roaming Mobile Network of a group of nodes, referred to as Mobile Network Nodes (MNNs), with mobility support managed by its Mobile R ...
Miercom Lab Test
... switches and a Cisco 7200 LAN/WAN Router. The same network structure was deployed at the remote site. The two sites were also connected by T1 links through an ADTRAN Atlas 800 central-office-switch simulator. This was used to test failover and rerouting scenarios. Fax support and other analog connec ...
... switches and a Cisco 7200 LAN/WAN Router. The same network structure was deployed at the remote site. The two sites were also connected by T1 links through an ADTRAN Atlas 800 central-office-switch simulator. This was used to test failover and rerouting scenarios. Fax support and other analog connec ...
The Real Cost of Free Programs such as Instant
... decentralized framework; however, by adding some control to this framework, it essentially becomes a hybrid of the central server and decentralized methods. The latest version of the Gnutella protocol uses this technology, as do KaZaA, Grokster and Groove, which are based on the Fasttrack protocol. ...
... decentralized framework; however, by adding some control to this framework, it essentially becomes a hybrid of the central server and decentralized methods. The latest version of the Gnutella protocol uses this technology, as do KaZaA, Grokster and Groove, which are based on the Fasttrack protocol. ...
The Top 10 DDoS Attack Trends
... SYN message to initiate a TCP connection with a host. The server responds with a SYN-ACK message, followed by receipt confirmation of the ACK message by the requester. This opens the network connection. In a SYN flood attack, the requester sends multiple SYN messages to the targeted server, but does ...
... SYN message to initiate a TCP connection with a host. The server responds with a SYN-ACK message, followed by receipt confirmation of the ACK message by the requester. This opens the network connection. In a SYN flood attack, the requester sends multiple SYN messages to the targeted server, but does ...
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.