chapterw4
... and are transmitted at 64 kbps. Assume propagation delays over the links are negligible. As a packet travels along the route, it encounters an average of 5 packets when it arrives at each node. How long does it take for the packet to get to the receiver if the nodes transmit on a ...
... and are transmitted at 64 kbps. Assume propagation delays over the links are negligible. As a packet travels along the route, it encounters an average of 5 packets when it arrives at each node. How long does it take for the packet to get to the receiver if the nodes transmit on a ...
networking - VCE IT Lecture Notes by Mark Kelly
... Software Development – all topics are relevant Note – several complex issues have been grossly simplified in this presentation. For example, detailed differences between switches and routers at the transport level are not necessary in any VCE course and will only serve to frighten sensitive souls. ...
... Software Development – all topics are relevant Note – several complex issues have been grossly simplified in this presentation. For example, detailed differences between switches and routers at the transport level are not necessary in any VCE course and will only serve to frighten sensitive souls. ...
PowerPoint Presentation - Overview of Wireless Technology
... vector making it longer). The information is replicated many times throughout the bandwidth, so if one “lobe” of the information is jammed, the remainder “gets through”. Highly robust technique. ...
... vector making it longer). The information is replicated many times throughout the bandwidth, so if one “lobe” of the information is jammed, the remainder “gets through”. Highly robust technique. ...
Lecture-02: Signals fundamentals
... • LTE-Advanced and gigabit Wi-Fi now being deployed • LTU and associated research currently very active • Machine-to-machine communications – The “Internet of Things” – Devices interact with each other • Healthcare, disaster recovery, energy savings, security and surveillance, environmental awarenes ...
... • LTE-Advanced and gigabit Wi-Fi now being deployed • LTU and associated research currently very active • Machine-to-machine communications – The “Internet of Things” – Devices interact with each other • Healthcare, disaster recovery, energy savings, security and surveillance, environmental awarenes ...
Part I: Introduction - Central South University
... routes may change during session analogy: driving, asking directions ...
... routes may change during session analogy: driving, asking directions ...
In recent years, a cost effective Wireless Mesh Networks ( WMNs
... network interface cards (NICs) can connect directly to WMNs through wireless mesh routers. Customers without wireless NICs can access WMNs by connecting to wireless mesh routers through, for example, Ethernet. Thus, WMNs will greatly help users to be always-on-line anywhere, anytime. Therefore, inst ...
... network interface cards (NICs) can connect directly to WMNs through wireless mesh routers. Customers without wireless NICs can access WMNs by connecting to wireless mesh routers through, for example, Ethernet. Thus, WMNs will greatly help users to be always-on-line anywhere, anytime. Therefore, inst ...
Computer Networks II
... The objective of this course is to introduce students to a set of basic topics in networking and lead them to the understanding of the networking architecture. Relationship Students who have completed the course successfully should be able to Net Effect Prog. Output ...
... The objective of this course is to introduce students to a set of basic topics in networking and lead them to the understanding of the networking architecture. Relationship Students who have completed the course successfully should be able to Net Effect Prog. Output ...
D-Link AirPlus Xtreme G DWL-G810
... With the DWL-G810 you can provide instant wireless access to the LAN (Local Area Network) for Ethernet-enabled devices. With an Ethernet (CAT5) cable simply connect the DWL-G810 to the Ethernet port of a network device (such as a printer or web camera) to establish a wireless connection with another ...
... With the DWL-G810 you can provide instant wireless access to the LAN (Local Area Network) for Ethernet-enabled devices. With an Ethernet (CAT5) cable simply connect the DWL-G810 to the Ethernet port of a network device (such as a printer or web camera) to establish a wireless connection with another ...
Chapter 1.
... network server software and hardware • Installing, configuring, and troubleshooting network client software and hardware • Understanding the characteristics of different transmission media • Understanding network design ...
... network server software and hardware • Installing, configuring, and troubleshooting network client software and hardware • Understanding the characteristics of different transmission media • Understanding network design ...
Adventures in Computer Security - Applied Crypto Group at Stanford
... Attacker sets up network of machines • Break in by buffer overflow, etc. ...
... Attacker sets up network of machines • Break in by buffer overflow, etc. ...
Chapter 1
... server software and hardware • Installing, configuring, and troubleshooting network client software and hardware • Understanding the characteristics of different transmission media • Understanding network design ...
... server software and hardware • Installing, configuring, and troubleshooting network client software and hardware • Understanding the characteristics of different transmission media • Understanding network design ...
A Survey of Secure Wireless Ad Hoc Routing
... 1. To initiate a route discovery, the initiator S broadcasts a signed ROUTE REQUEST packet that includes the target D, its certificate (certS), a nonce N, and a timestamp t. 2. Each node that forwards this REQUEST checks the signature or signatures. Node C checks node B’s certificate certB, then che ...
... 1. To initiate a route discovery, the initiator S broadcasts a signed ROUTE REQUEST packet that includes the target D, its certificate (certS), a nonce N, and a timestamp t. 2. Each node that forwards this REQUEST checks the signature or signatures. Node C checks node B’s certificate certB, then che ...
IDS
... • At the early stage of the worm, only limited worm samples. • Host based sensors can only cover limited IP space, which has scalability issues. Thus they might not be able to detect the worm in its early stage. ...
... • At the early stage of the worm, only limited worm samples. • Host based sensors can only cover limited IP space, which has scalability issues. Thus they might not be able to detect the worm in its early stage. ...
A predictive rapid mobility extensions for Mobile-IP
... During Handoff, the MH compares the new vector of care-of-addresses with the old one. Again, it chooses the lowest level address of the FA that appears in both-vectors and sends a Regional Registration Request, which is processed by the FA. There is no need to notify any higher-level FA about this h ...
... During Handoff, the MH compares the new vector of care-of-addresses with the old one. Again, it chooses the lowest level address of the FA that appears in both-vectors and sends a Regional Registration Request, which is processed by the FA. There is no need to notify any higher-level FA about this h ...
Types of Computer Networks
... like a star, a device called a concentrator can be either a hub or switch into the center, where all the computers in a network connected to this concentrator. ...
... like a star, a device called a concentrator can be either a hub or switch into the center, where all the computers in a network connected to this concentrator. ...
O4102103111
... method of encryption (none, WEP, or WPA) and the same encryption keys. They may be configured to different service set identifiers. WDS also requires that every base station be configured to forward to others in the system. WDS may also be referred to as repeater mode because it appears to bridge an ...
... method of encryption (none, WEP, or WPA) and the same encryption keys. They may be configured to different service set identifiers. WDS also requires that every base station be configured to forward to others in the system. WDS may also be referred to as repeater mode because it appears to bridge an ...
Ruckus MetroFlex DZ - IP Camera Beveiliging
... other Ruckus products (MediaFlex router and adapter), MetroFlex substantially increases both Wi-Fi performance and range. The Ruckus MetroFlex DZ seamlessly communicates with metro Wi-Fi nodes by automatically associating with the best outdoor node. This built-in intelligence delivers optimum connec ...
... other Ruckus products (MediaFlex router and adapter), MetroFlex substantially increases both Wi-Fi performance and range. The Ruckus MetroFlex DZ seamlessly communicates with metro Wi-Fi nodes by automatically associating with the best outdoor node. This built-in intelligence delivers optimum connec ...
Lecture4_Networking_..
... To optimize packet lengths for various communication links, IP offers network elements (routers and firewalls) the ability to slice up packets into smaller pieces, a process called fragmentation. The end system’s IP layer is responsible for reassembling all fragments Hackers use packet fragmentation ...
... To optimize packet lengths for various communication links, IP offers network elements (routers and firewalls) the ability to slice up packets into smaller pieces, a process called fragmentation. The end system’s IP layer is responsible for reassembling all fragments Hackers use packet fragmentation ...
ppt - CIS @ Temple University
... Bad guys: attack server, network infrastructure Denial of Service (DoS): attackers make resources (server, bandwidth) unavailable to legitimate traffic by overwhelming resource with bogus traffic 1. select target 2. break into hosts around the network (see botnet) 3. send packets to target from com ...
... Bad guys: attack server, network infrastructure Denial of Service (DoS): attackers make resources (server, bandwidth) unavailable to legitimate traffic by overwhelming resource with bogus traffic 1. select target 2. break into hosts around the network (see botnet) 3. send packets to target from com ...
what is ec security?
... “intruders”) from accessing any part of the EC system detection measures Ways to determine whether intruders attempted to break into the EC system; whether they were successful; and what they may have done information assurance (IA) The protection of information systems against unauthorized access t ...
... “intruders”) from accessing any part of the EC system detection measures Ways to determine whether intruders attempted to break into the EC system; whether they were successful; and what they may have done information assurance (IA) The protection of information systems against unauthorized access t ...
Glossary
... Network File System (NFS) – A distributed file system originally developed at Sun Microsystems. It supports network-based file and printer sharing using TCP/IP- based network protocols. Network Interface Card (NIC) – A PC adapter board designed to permit a computer to be attached to one or more type ...
... Network File System (NFS) – A distributed file system originally developed at Sun Microsystems. It supports network-based file and printer sharing using TCP/IP- based network protocols. Network Interface Card (NIC) – A PC adapter board designed to permit a computer to be attached to one or more type ...
Guide to Operating System Security
... Make sure IPChains is turned off Start IPTables service and ensure that it starts automatically each time OS is booted Configure firewall to deny incoming, outgoing, and forwarded packets Make sure all configured options are saved and reused each time computer is booted ...
... Make sure IPChains is turned off Start IPTables service and ensure that it starts automatically each time OS is booted Configure firewall to deny incoming, outgoing, and forwarded packets Make sure all configured options are saved and reused each time computer is booted ...
Wireless security
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.