IC3: Network Security _______________ Firewalls
... High performance networking Good protocol support (eg: FTP, IRC, H.323) ...
... High performance networking Good protocol support (eg: FTP, IRC, H.323) ...
Security in Computing - Pravin Shetty > Resume
... an inordinate amount of network traffic. easy to detect but difficult to prevent! ...
... an inordinate amount of network traffic. easy to detect but difficult to prevent! ...
lect04
... I want you to realize that, if you can imagine a computer doing something, you can program a computer to do that. Unbounded opportunity... limited only by your imagination. And a couple of laws of physics. TCP/IP, HTTP How, Why, What, When? ...
... I want you to realize that, if you can imagine a computer doing something, you can program a computer to do that. Unbounded opportunity... limited only by your imagination. And a couple of laws of physics. TCP/IP, HTTP How, Why, What, When? ...
pptx
... B. Hajek and A. Ephremides, “Information theory and communications networks: An unconsummated union,” IEEE Trans. Inf. Theory, Oct. 1998. ...
... B. Hajek and A. Ephremides, “Information theory and communications networks: An unconsummated union,” IEEE Trans. Inf. Theory, Oct. 1998. ...
DRS5000 Configuration
... Log into the Webmin portion of the DRS5000 In the left menu click on Servers to open list Click on PostgreSQL Database Server On the right, click on Allowed Hosts At the bottom of the allowed hosts list, click on Create a new allowed host Click on the radio button to fill next to Network (the lower ...
... Log into the Webmin portion of the DRS5000 In the left menu click on Servers to open list Click on PostgreSQL Database Server On the right, click on Allowed Hosts At the bottom of the allowed hosts list, click on Create a new allowed host Click on the radio button to fill next to Network (the lower ...
Slide 1
... enables systems on a TCP/IP network to share status and error information. You can use the status information to detect network trouble. ICMP messages are capsulated within IP datagrams so that they may be routed throughout a network. Two programs that use ICMP messages are Ping and Tracert. You can ...
... enables systems on a TCP/IP network to share status and error information. You can use the status information to detect network trouble. ICMP messages are capsulated within IP datagrams so that they may be routed throughout a network. Two programs that use ICMP messages are Ping and Tracert. You can ...
Security
... Fragmented Packet Attacks Internet messages transmitted via TCP/IP can be divided into packets in such a way that only the first packet contains the TCP segment header information. Some firewalls will allow the processing of subsequent packets that do not contain the same source address informati ...
... Fragmented Packet Attacks Internet messages transmitted via TCP/IP can be divided into packets in such a way that only the first packet contains the TCP segment header information. Some firewalls will allow the processing of subsequent packets that do not contain the same source address informati ...
CECS470
... – Protocol definitions range from how bits are placed on a wire to the format of an e-mail message. – Standard protocols allow different manufacturers' computers to communicate. These computers can use completely different software/hardware, provided each computer's software can agree upon the meani ...
... – Protocol definitions range from how bits are placed on a wire to the format of an e-mail message. – Standard protocols allow different manufacturers' computers to communicate. These computers can use completely different software/hardware, provided each computer's software can agree upon the meani ...
DHCP snooping
... Set up a rogue DHCP server serving clients with false details E.g. giving them its own IP as default router Result in all the traffic passing through the attacker’s computer ...
... Set up a rogue DHCP server serving clients with false details E.g. giving them its own IP as default router Result in all the traffic passing through the attacker’s computer ...
Slide 1
... Q. Explain when mobile IP is needed Q. Why and where is encapsulation needed for mobile IP? Q. Explain packet flow if two mobile nodes communicate and both are in foreign networks. What additional routes do packets take if reverse tunnelling is required? Q. What is meant by tunnelling? Explain how t ...
... Q. Explain when mobile IP is needed Q. Why and where is encapsulation needed for mobile IP? Q. Explain packet flow if two mobile nodes communicate and both are in foreign networks. What additional routes do packets take if reverse tunnelling is required? Q. What is meant by tunnelling? Explain how t ...
The-Internet
... – Header has 20 bytes for required fields; then optional fields bringing maximum size to 60 bytes – Data length is variable (but must be integer multiple of 8 bits in length); maximum size of datagram (that is, header + data) is 65,535 bytes ...
... – Header has 20 bytes for required fields; then optional fields bringing maximum size to 60 bytes – Data length is variable (but must be integer multiple of 8 bits in length); maximum size of datagram (that is, header + data) is 65,535 bytes ...
What is a TOPOLOGY? Network topology is the arrangement of the
... 1) There is a limit on central cable length and number of nodes that can be connected. 2) Dependency on central cable in this topology has its disadvantages.If the main cable (i.e. bus ) encounters some problem, whole network breaks down. 3) Proper termination is required to dump signals. Use of ter ...
... 1) There is a limit on central cable length and number of nodes that can be connected. 2) Dependency on central cable in this topology has its disadvantages.If the main cable (i.e. bus ) encounters some problem, whole network breaks down. 3) Proper termination is required to dump signals. Use of ter ...
Supporting Differentiated Services in MPLS Networks
... running on top of TCP/UDP/IP, and which supports the extensions mentioned above. It is used to exchange LDP PDUs with peer LDPs. It also interfaces to the DiffServ module and the MPLS daemon. Admission Control: It is used to find out whether available resources are sufficient to supply the requested ...
... running on top of TCP/UDP/IP, and which supports the extensions mentioned above. It is used to exchange LDP PDUs with peer LDPs. It also interfaces to the DiffServ module and the MPLS daemon. Admission Control: It is used to find out whether available resources are sufficient to supply the requested ...
BK22370373
... Firewalls offer weak defense from viruses so antiviral software and an IDS (intrusion detection system) which protects against Trojans and port scans should also complement your firewall in the layering defense. Some firewalls claim full firewall capability when it's not the case. Not all firewalls ...
... Firewalls offer weak defense from viruses so antiviral software and an IDS (intrusion detection system) which protects against Trojans and port scans should also complement your firewall in the layering defense. Some firewalls claim full firewall capability when it's not the case. Not all firewalls ...
LAN BASICS
... • If IPX/SPX is to be installed in a Microsoft client then the ODI driver must be installed • The alternative of installing NWLink is preferred – Works with NDIS driver ...
... • If IPX/SPX is to be installed in a Microsoft client then the ODI driver must be installed • The alternative of installing NWLink is preferred – Works with NDIS driver ...
Chapter08x - Virtualinspire
... •The backplane of a switch is fast enough to support multiple data transfers at one time. •A switch that employs cut-through architecture is passing on the frame before the entire frame has arrived at the switch. •Multiple workstations connected to a switch use dedicated segments. This is a very eff ...
... •The backplane of a switch is fast enough to support multiple data transfers at one time. •A switch that employs cut-through architecture is passing on the frame before the entire frame has arrived at the switch. •Multiple workstations connected to a switch use dedicated segments. This is a very eff ...
Slide 1
... Bytes of “Free Space”. In a typical system, and depending of its use (NOTE: digital pictures, music and video use LOTS of bytes!), an amount of Free Space less than 1 Giga Byte could soon be insufficient for all the tasks needing it (Windows itself needs about 200 Mega Bytes, or two-tenths of a Giga ...
... Bytes of “Free Space”. In a typical system, and depending of its use (NOTE: digital pictures, music and video use LOTS of bytes!), an amount of Free Space less than 1 Giga Byte could soon be insufficient for all the tasks needing it (Windows itself needs about 200 Mega Bytes, or two-tenths of a Giga ...
Networking
... Each layer communicates with the same layer’s software or hardware on other computers. The lower 4 layers (transport, network, data link and physical —Layers 4, 3, 2, and 1) are concerned with the flow of data from end to end through the network. The upper four layers of the OSI model (application, ...
... Each layer communicates with the same layer’s software or hardware on other computers. The lower 4 layers (transport, network, data link and physical —Layers 4, 3, 2, and 1) are concerned with the flow of data from end to end through the network. The upper four layers of the OSI model (application, ...
chapter 10 - University of Windsor
... Subnet & Supernet Address Extensions The original IP Addressing Scheme: For each host--a Unique IP address; For each physical network - a Unique netid A site may assign and use IP addresses in UNUSUAL ways as long as All hosts & routers at the site agree to honor the site’s addressing scheme Oth ...
... Subnet & Supernet Address Extensions The original IP Addressing Scheme: For each host--a Unique IP address; For each physical network - a Unique netid A site may assign and use IP addresses in UNUSUAL ways as long as All hosts & routers at the site agree to honor the site’s addressing scheme Oth ...
DoS Attacks On Wireless Voice Over IP Systems
... • Utilise a timer when a station sends a deauthentication frame to the access point. Within a certain time period if the station sends data frames to the AP then it will not deauthenticate the station and assume an attack has occurred. • Week form of protection which is not practical to implement. H ...
... • Utilise a timer when a station sends a deauthentication frame to the access point. Within a certain time period if the station sends data frames to the AP then it will not deauthenticate the station and assume an attack has occurred. • Week form of protection which is not practical to implement. H ...
Ethernet: CSMA/CD (Carrier Sense Multiple Access with Collision
... Using and Configuring Frames • Cannot expect interoperability between frame types • Node’s Data Link layer services must be properly configured for types of frames it might receive – LAN administrators must ensure all devices use same, correct frame type – Most networks use Ethernet_II ...
... Using and Configuring Frames • Cannot expect interoperability between frame types • Node’s Data Link layer services must be properly configured for types of frames it might receive – LAN administrators must ensure all devices use same, correct frame type – Most networks use Ethernet_II ...
Wake-on-LAN
Wake-on-LAN (WoL) is an Ethernet or Token ring computer networking standard that allows a computer to be turned on or awakened by a network message.The message is usually sent by a program executed on another computer on the same local area network. It is also possible to initiate the message from another network by using subnet directed broadcasts or a WOL gateway service. Equivalent terms include wake on WAN, remote wake-up, power on by LAN, power up by LAN, resume by LAN, resume on LAN and wake up on LAN. In case the computer being awakened is communicating via Wi-Fi, a supplementary standard called Wake on Wireless LAN (WoWLAN) must be employed.The WOL and WoWLAN standards are often supplemented by vendors to provide protocol-transparent on-demand services, for example in the Apple Bonjour wake-on-demand (Sleep Proxy) feature.