Discuss the Importance of Computer Networks
... 3. List and Describe the Hardware Used in Both Wired and Wireless Networks 4. List and Describe Network Software and Protocols 5. Explain How to Protect a Network ...
... 3. List and Describe the Hardware Used in Both Wired and Wireless Networks 4. List and Describe Network Software and Protocols 5. Explain How to Protect a Network ...
332.2.1 - dhimas ruswanto
... along which several trains run. The track is interspersed with occasional railway stations. When a train is on the track, all other trains must abide by a procedure that governs how and when they enter the flow of traffic. Without such a procedure, entering trains would collide with the one already ...
... along which several trains run. The track is interspersed with occasional railway stations. When a train is on the track, all other trains must abide by a procedure that governs how and when they enter the flow of traffic. Without such a procedure, entering trains would collide with the one already ...
ACCESS NETWORKING - CERN Computing Seminars
... • Low band width • Cost of connect time on PSTN even when not being used for data transmission • Not suitable for many high BW applications like video conferencing, Bulk file transfer etc. ...
... • Low band width • Cost of connect time on PSTN even when not being used for data transmission • Not suitable for many high BW applications like video conferencing, Bulk file transfer etc. ...
Powerpoint
... A network that connects a relatively small number of machines in a relatively close geographical area Ring topology connects all nodes in a closed loop on which messages travel in one direction Star topology centers around one node to which all others are connected and through which all messages are ...
... A network that connects a relatively small number of machines in a relatively close geographical area Ring topology connects all nodes in a closed loop on which messages travel in one direction Star topology centers around one node to which all others are connected and through which all messages are ...
Click to Principals of Networking notes
... Local Area Network (LAN) refers to a group of interconnected computers that is under the same administrative control. In the past, LANs were considered to be small networks that existed in a single physical location. Although LANs can be as small as a single local network installed in a home or smal ...
... Local Area Network (LAN) refers to a group of interconnected computers that is under the same administrative control. In the past, LANs were considered to be small networks that existed in a single physical location. Although LANs can be as small as a single local network installed in a home or smal ...
slides - CSE Home
... The Internet is making fundamental changes 1. Nowhere is remote—access to info is no longer bound to a place 2. Connecting with others—email is great 3. Revised human relationships—too much time spent online could be bad 4. English becoming a universal language 5. Enhanced freedom of speech, assembl ...
... The Internet is making fundamental changes 1. Nowhere is remote—access to info is no longer bound to a place 2. Connecting with others—email is great 3. Revised human relationships—too much time spent online could be bad 4. English becoming a universal language 5. Enhanced freedom of speech, assembl ...
Moblie IP
... with problems of mobile users – Enables hosts to stay connected to the Internet regardless of their location – Enables hosts to be tracked without needing to change their IP address – Requires no changes to software of non-mobile hosts/routers – Requires addition of some infrastructure – Has no geog ...
... with problems of mobile users – Enables hosts to stay connected to the Internet regardless of their location – Enables hosts to be tracked without needing to change their IP address – Requires no changes to software of non-mobile hosts/routers – Requires addition of some infrastructure – Has no geog ...
02-evolution2
... DiffServ is stateless (like IP) and scales Service Profiles can be defined by ISP for customers and by transit providers for ISPs DiffServ is very easily deployable and could enable well working VoIP and real-time video Unfortunately, it is not used between operators ...
... DiffServ is stateless (like IP) and scales Service Profiles can be defined by ISP for customers and by transit providers for ISPs DiffServ is very easily deployable and could enable well working VoIP and real-time video Unfortunately, it is not used between operators ...
wireless - CSE Buffalo
... RTSs may still collide with each other (but they’re short) BS broadcasts clear-to-send CTS in response to RTS CTS heard by all nodes sender transmits data frame other stations defer transmissions ...
... RTSs may still collide with each other (but they’re short) BS broadcasts clear-to-send CTS in response to RTS CTS heard by all nodes sender transmits data frame other stations defer transmissions ...
VPN Scenarios
... • 1.Connect CLIENT1 to the intranet network segment. • 2.On CLIENT1, install Windows XP Professional as a member computer named CLIENT1 of the example.com domain. • 3.Add the VPNUser account in the example.com domain to the local Administrators group. • 4.Log off and then log on using the VPNUser a ...
... • 1.Connect CLIENT1 to the intranet network segment. • 2.On CLIENT1, install Windows XP Professional as a member computer named CLIENT1 of the example.com domain. • 3.Add the VPNUser account in the example.com domain to the local Administrators group. • 4.Log off and then log on using the VPNUser a ...
Network
... single resource can be shared concurrently into multiple virtual resources and support isolation of any virtual resource from all others and support abstraction in which a given virtual resource need not directly correspond to its physical characteristics. 4) Network management: be able to efficient ...
... single resource can be shared concurrently into multiple virtual resources and support isolation of any virtual resource from all others and support abstraction in which a given virtual resource need not directly correspond to its physical characteristics. 4) Network management: be able to efficient ...
William Stallings, Cryptography and Network Security 3/e
... The outside router advertises only the existence of the screened subnet to the Internet; therefore, the internal network is invisible to the Internet. Similarly, the inside router advertises only the existence of the screened subnet to the internal network; therefore, the systems on the inside netwo ...
... The outside router advertises only the existence of the screened subnet to the Internet; therefore, the internal network is invisible to the Internet. Similarly, the inside router advertises only the existence of the screened subnet to the internal network; therefore, the systems on the inside netwo ...
QUESTION DRILL TELECOM 020504 - Answers
... source but is directed toward multiple specific destinations. 28. What LAN media access method can be used to connect systems up to 2 km apart, support transmission rates up to 100MBps, is highly resistant to electromagnetic and radio frequency interference, and is often used to connect several diff ...
... source but is directed toward multiple specific destinations. 28. What LAN media access method can be used to connect systems up to 2 km apart, support transmission rates up to 100MBps, is highly resistant to electromagnetic and radio frequency interference, and is often used to connect several diff ...
EC6802- Wireless Networks VIII semester ECE Two marks
... (MSRs) to transport layer communication between mobile hosts and fixed hosts. It uses the standard TCP for its connection over the wireless hop and like other spit connection protocols, attempts to separate loss recovery over the wireless link from the wired link. ...
... (MSRs) to transport layer communication between mobile hosts and fixed hosts. It uses the standard TCP for its connection over the wireless hop and like other spit connection protocols, attempts to separate loss recovery over the wireless link from the wired link. ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... relayed by a node, β is the buffer occupancy of the node, and Erem is the residual energy of the node, while the terms on the right side of the inequalities indicate the associated threshold values for these parameters, respectively. The initiative, I, is set to 1 if all four conditions in (1) are s ...
... relayed by a node, β is the buffer occupancy of the node, and Erem is the residual energy of the node, while the terms on the right side of the inequalities indicate the associated threshold values for these parameters, respectively. The initiative, I, is set to 1 if all four conditions in (1) are s ...
Ten top problems network techs encounter
... whether this problem happens constantly or only sporadically. If the user has a proper IP address for the connection they are on, there may be a routing issue on the network between the user and server. This can be verified with a simple ping. If connectivity is lost sporadically, this can be caused ...
... whether this problem happens constantly or only sporadically. If the user has a proper IP address for the connection they are on, there may be a routing issue on the network between the user and server. This can be verified with a simple ping. If connectivity is lost sporadically, this can be caused ...
copyrighted material - Beck-Shop
... The star topology, as shown in Figure 1.8, is the most commonly used method of connecting devices together on a LAN today. It consists of multiple devices connected by a central connection device. Common central connection devices include hubs, switches, and wireless access points, although hubs are ...
... The star topology, as shown in Figure 1.8, is the most commonly used method of connecting devices together on a LAN today. It consists of multiple devices connected by a central connection device. Common central connection devices include hubs, switches, and wireless access points, although hubs are ...
Introduction
... • Are there fundamental characteristics of WLAN traces that do not change with technology (e.g., they apply to future ad hoc networks)? – Study human mobility/behavior for non-wireless traces or nonnetwork traces and compare the characteristics – Suggest another way to investigate such question ...
... • Are there fundamental characteristics of WLAN traces that do not change with technology (e.g., they apply to future ad hoc networks)? – Study human mobility/behavior for non-wireless traces or nonnetwork traces and compare the characteristics – Suggest another way to investigate such question ...
VIRTUAL PRIVATE NETWORK
... Data Encryption Data sent and received over the Internet must be encrypted for privacy Microsoft Implementation of these protocols uses IPSec encryption to protect the data stream from the client to the tunnel server. ...
... Data Encryption Data sent and received over the Internet must be encrypted for privacy Microsoft Implementation of these protocols uses IPSec encryption to protect the data stream from the client to the tunnel server. ...
AMIA 2000 Presentation as PowerPoint
... Information Systems Security is a timely issue (see recent Microsoft penetration). Healthcare organizations have especially sensitive information, and must pay close attention to security policies (and are mandated to do so by HIPAA). ...
... Information Systems Security is a timely issue (see recent Microsoft penetration). Healthcare organizations have especially sensitive information, and must pay close attention to security policies (and are mandated to do so by HIPAA). ...
Business Data Communications and Networking
... by Ethernet. Two methods are simultaneously used: ...
... by Ethernet. Two methods are simultaneously used: ...
Slide 1
... these nodes when the packets are sent and received. Actions in Link layer • sending and receiving frames including error detection ...
... these nodes when the packets are sent and received. Actions in Link layer • sending and receiving frames including error detection ...
CSE 461 - University of Washington
... listens for a signal and holds off on transmitting until there is no traffic • Bonus question: why does 802.11 use a variable bitrate, while Ethernet’s bitrate is constant once configured? • 802.11’s maximum bitrate can change easily; Ethernet’s cannot. ...
... listens for a signal and holds off on transmitting until there is no traffic • Bonus question: why does 802.11 use a variable bitrate, while Ethernet’s bitrate is constant once configured? • 802.11’s maximum bitrate can change easily; Ethernet’s cannot. ...
Network Segmentation Through Policy Abstraction
... developers, or perhaps executives.3 Traditional access controls are no defense against such attacks because the enforcement points are at the perimeter. Once an outside attacker gains the privileges of an insider, or for that matter a malicious insider abuses their privileges, they have free reign t ...
... developers, or perhaps executives.3 Traditional access controls are no defense against such attacks because the enforcement points are at the perimeter. Once an outside attacker gains the privileges of an insider, or for that matter a malicious insider abuses their privileges, they have free reign t ...
AMAR RASHEED
... captures compared to preexisting security schemes. Embedded Systems and Codesign Laboratory (TAMU) July 2009 – December 2009 Advisor: Rabi N. Mahapatra. Research Area: Security schemes to defend against mobile sink replication attacks in sensor networks. I developed a general framework that substant ...
... captures compared to preexisting security schemes. Embedded Systems and Codesign Laboratory (TAMU) July 2009 – December 2009 Advisor: Rabi N. Mahapatra. Research Area: Security schemes to defend against mobile sink replication attacks in sensor networks. I developed a general framework that substant ...
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.