![TCP/IP architecture](http://s1.studyres.com/store/data/008741044_1-308aa1fe23aef1f0439731a7ca246504-300x300.png)
TCP/IP architecture
... The procedure executed at routers 1. Router receives a frame from one network (e.g., N1) through its physical layer 2. The data link entity for N1 extracts the IP packet from the frame and passes the IP packet up to its network entity. 3. The network entity checks destination IP address (finds the ...
... The procedure executed at routers 1. Router receives a frame from one network (e.g., N1) through its physical layer 2. The data link entity for N1 extracts the IP packet from the frame and passes the IP packet up to its network entity. 3. The network entity checks destination IP address (finds the ...
network
... Advantages and disadvantages of networks Peer-to-peer and client/server LANs Importance of network protocols Most widely used LAN protocol Special components of a WAN The difference between circuit-switching and packet switching networks ...
... Advantages and disadvantages of networks Peer-to-peer and client/server LANs Importance of network protocols Most widely used LAN protocol Special components of a WAN The difference between circuit-switching and packet switching networks ...
Apply encryption to network and system security
... applied to data in storage (file systems, media, etc) or in transit via network or Internet connections. Encryption can be useful to achieve appropriate levels of network security required by organisations. For example, an organisation using the Internet to perform financial transactions will want t ...
... applied to data in storage (file systems, media, etc) or in transit via network or Internet connections. Encryption can be useful to achieve appropriate levels of network security required by organisations. For example, an organisation using the Internet to perform financial transactions will want t ...
Analyzing the Effect of Variable Round Time for Clustering
... about the number of cluster heads. [9] proposed an improvement over LEACH by selecting the CH not randomly but considering the remaining energy when the energy level drops below 50% of the initial energy. Cluster head join process is determined not only by received signal strength but also by the re ...
... about the number of cluster heads. [9] proposed an improvement over LEACH by selecting the CH not randomly but considering the remaining energy when the energy level drops below 50% of the initial energy. Cluster head join process is determined not only by received signal strength but also by the re ...
Principles of Computer Security
... – Filter undesirable content – Filter malicious code such as browser hijacking attempts ...
... – Filter undesirable content – Filter malicious code such as browser hijacking attempts ...
Uppsala University.
... Networking including routing are complex tasks. Regardless of what type of equipment is used, a serious network manager must understand, test and verify it. Specifications are wrong or missing or does not work as expected, there may be incompatibility problems etc. This is not only crucial for succe ...
... Networking including routing are complex tasks. Regardless of what type of equipment is used, a serious network manager must understand, test and verify it. Specifications are wrong or missing or does not work as expected, there may be incompatibility problems etc. This is not only crucial for succe ...
SSH - Information Services and Technology
... IP and TCP Attacks: SSH operates on top of TCP, therefore some of its weaknesses come from TCP/IP problems. of the SSH connection. ...
... IP and TCP Attacks: SSH operates on top of TCP, therefore some of its weaknesses come from TCP/IP problems. of the SSH connection. ...
Bluetooth Comparison
... •Transmit power up to +24dBm • Receiver Sensitivity in 2FSK • Optional low power transmit mode: 0 to 4 dBm for portable devices. ...
... •Transmit power up to +24dBm • Receiver Sensitivity in 2FSK • Optional low power transmit mode: 0 to 4 dBm for portable devices. ...
IOSR Journal of Computer Engineering (IOSR-JCE)
... secure file transfer, and remote access to a variety of TCP/IP applications via a secure tunnel. Secure Shell client and server applications are widely available for most popular operating systems. The secure shell protocol allows users to log in remote terminals in a secure fashion. It does this by ...
... secure file transfer, and remote access to a variety of TCP/IP applications via a secure tunnel. Secure Shell client and server applications are widely available for most popular operating systems. The secure shell protocol allows users to log in remote terminals in a secure fashion. It does this by ...
Wide Area Networks (WANs) - TFE
... We will also look at how attackers can alter the normal operation of a network We will look at both wired (LAN) and wireless (WLAN) networks © 2015 Pearson Education Ltd. ...
... We will also look at how attackers can alter the normal operation of a network We will look at both wired (LAN) and wireless (WLAN) networks © 2015 Pearson Education Ltd. ...
Electronic Shepherd – A Low-Cost, Low-Bandwidth, Wireless Network System Bjørn Thorstensen Tore Syversen
... closest to ours. Indeed, they seek to find low-power, positionaware, wireless communication systems, also including biological sensors, all of which is very relevant to our project. They describe a system for tracking wild animals over a large area, where collars mounted at each animal operate in a ...
... closest to ours. Indeed, they seek to find low-power, positionaware, wireless communication systems, also including biological sensors, all of which is very relevant to our project. They describe a system for tracking wild animals over a large area, where collars mounted at each animal operate in a ...
02 CAPWAP encryption using DTLS.1396605379
... nonvolatile memory. This process of storing controller IP addresses on an access point for later deployment is called priming the access point. • DHCP server discovery—This feature uses DHCP option 43 to provide controller IP addresses to the access points. Cisco switches support a DHCP server opti ...
... nonvolatile memory. This process of storing controller IP addresses on an access point for later deployment is called priming the access point. • DHCP server discovery—This feature uses DHCP option 43 to provide controller IP addresses to the access points. Cisco switches support a DHCP server opti ...
Part I: Introduction
... Where would we put the MAC? If at end, no message integrity until all data processed. For example, with instant messaging, how can we do integrity check over all bytes sent before displaying? ...
... Where would we put the MAC? If at end, no message integrity until all data processed. For example, with instant messaging, how can we do integrity check over all bytes sent before displaying? ...
DLB APC v5.95 User’s Guide Revision 1.0 9 October 2014
... Web Management Structure ............................................................................................................... 9 Appling and Saving Configuration Changes ..................................................................................... 11 ...
... Web Management Structure ............................................................................................................... 9 Appling and Saving Configuration Changes ..................................................................................... 11 ...
Seamless Handoff Between Heterogeneous Wireless Networks
... Handoff delay-time elapsed between the last packet received on the old connection to the first packet received on the new connection. Handoff delay was about 600ms when switching from WWAN to WLAN Handoff delay was about 1040ms when switching from WLAN to WWAN. ...
... Handoff delay-time elapsed between the last packet received on the old connection to the first packet received on the new connection. Handoff delay was about 600ms when switching from WWAN to WLAN Handoff delay was about 1040ms when switching from WLAN to WWAN. ...
A Security Pattern for a Virtual Private Network
... • The system should be flexible enough to accommodate different ways of providing security. • We should restrict access to the system to only authorized users. • We need to use the Internet or public networks to reduce the cost; in turn subjecting the private network established within the public ne ...
... • The system should be flexible enough to accommodate different ways of providing security. • We should restrict access to the system to only authorized users. • We need to use the Internet or public networks to reduce the cost; in turn subjecting the private network established within the public ne ...
Lecture5 - The University of Texas at Dallas
... control (DAC) and mandatory access control (MAC). Accountability: Accountability uses such system components as audit trails (records) and logs to associate a subject with its actions. The information recorded should be sufficient to map the subject to a controlling user. Audit trails and logs are i ...
... control (DAC) and mandatory access control (MAC). Accountability: Accountability uses such system components as audit trails (records) and logs to associate a subject with its actions. The information recorded should be sufficient to map the subject to a controlling user. Audit trails and logs are i ...
Wireless Ad-Hoc Networking (ELG7178F)
... Ans. This is caused by TCP's half-close. Since a TCP connection is fullduplex (that is, data can be flowing in each direction independent of the other direction), each direction must be shut down independently. The rule is that either end can send a FIN when it is done sending data. When a TCP recei ...
... Ans. This is caused by TCP's half-close. Since a TCP connection is fullduplex (that is, data can be flowing in each direction independent of the other direction), each direction must be shut down independently. The rule is that either end can send a FIN when it is done sending data. When a TCP recei ...
Background - comp
... uses its private key to produce the signature, and the receiver uses the public key to verify it. – In RSA, both the private key and public key can be used for encryption (not with DSS). – Alice encrypts M using its private key: EPri(A)(M). – Alice sends M and EPri(A)(M) to Bob. – Bob decrypts M usi ...
... uses its private key to produce the signature, and the receiver uses the public key to verify it. – In RSA, both the private key and public key can be used for encryption (not with DSS). – Alice encrypts M using its private key: EPri(A)(M). – Alice sends M and EPri(A)(M) to Bob. – Bob decrypts M usi ...
Chapter8 Phase3: Gaining Access Using Network Attacks
... Attacker rsh to targeted trusting server using spoofed IP address of trusted server Trusting server sends an SYN-ACK packet to the unresponsive trusted server Attacker sends an ACK packet to trusting server with a guess at the sequence number. If ISN is correct, a connection is made. Although attack ...
... Attacker rsh to targeted trusting server using spoofed IP address of trusted server Trusting server sends an SYN-ACK packet to the unresponsive trusted server Attacker sends an ACK packet to trusting server with a guess at the sequence number. If ISN is correct, a connection is made. Although attack ...
Networking Primer - The Internet and the Link Layer ECE 299.02
... But, DSL uses twisted pair Transmission technology cannot support more than ~10Mbps ...
... But, DSL uses twisted pair Transmission technology cannot support more than ~10Mbps ...
E10 Quick Reference
... appears on Setup window even if the IP address is from remote network range. l A user on the local network may access WebEye, when WebEye is assigned a pro per IP address of the local network, though if gateway address, broadcast address and network mask are not assigned properly. However remote use ...
... appears on Setup window even if the IP address is from remote network range. l A user on the local network may access WebEye, when WebEye is assigned a pro per IP address of the local network, though if gateway address, broadcast address and network mask are not assigned properly. However remote use ...
Chapter 2: Network Hardware Essentials
... • Network repeaters and hubs take incoming bit signals and repeat those signals at their original strength out all connected ports • Network switches interconnect multiple computers just as hubs do • Switches use switching tables to determine which MAC address can be found on which port • Access poi ...
... • Network repeaters and hubs take incoming bit signals and repeat those signals at their original strength out all connected ports • Network switches interconnect multiple computers just as hubs do • Switches use switching tables to determine which MAC address can be found on which port • Access poi ...
nisscReport
... Location of emergency personnel. A sensor network is a possible solution for this need to quickly establish tactical communications and relay critical information to ensure the effectiveness and safety of disaster relief efforts. ...
... Location of emergency personnel. A sensor network is a possible solution for this need to quickly establish tactical communications and relay critical information to ensure the effectiveness and safety of disaster relief efforts. ...
Security_Networking
... Study of networking focused on protocols Networking protocols precisely specify the communication rules Details are given in RFCs ...
... Study of networking focused on protocols Networking protocols precisely specify the communication rules Details are given in RFCs ...
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.