Chapter 3 - Department of Computer and Information Science and
... underlying channel may flip bits in packet checksum to detect bit errors the question: how to recover from errors: acknowledgements (ACKs): receiver explicitly tells sender ...
... underlying channel may flip bits in packet checksum to detect bit errors the question: how to recover from errors: acknowledgements (ACKs): receiver explicitly tells sender ...
plenary-wap-00mar
... Initial goals of the WAP Forum Bring Internet based content & services to handheld wireless devices Work across global network technologies Allow creation of content that works across many types of link layers and device types ...
... Initial goals of the WAP Forum Bring Internet based content & services to handheld wireless devices Work across global network technologies Allow creation of content that works across many types of link layers and device types ...
Chapter 4: Communication
... • Protocols to support message-oriented services • Protocols to support streaming real-time data, as for multimedia applications • Protocols to support reliable multicast service across a wide-area network These protocols are built on top of low-level message passing, as supported by the transport l ...
... • Protocols to support message-oriented services • Protocols to support streaming real-time data, as for multimedia applications • Protocols to support reliable multicast service across a wide-area network These protocols are built on top of low-level message passing, as supported by the transport l ...
OSI model (Wikipedia).
... Berkeley sockets and System V Transport Layer Inter3 Cross-layer functions face, are interfaces between applications (layer 5 and above) and the transport (layer 4). NDIS and ODI are Cross-layer functions are services that are not tied to a interfaces between the media (layer 2) and the network give ...
... Berkeley sockets and System V Transport Layer Inter3 Cross-layer functions face, are interfaces between applications (layer 5 and above) and the transport (layer 4). NDIS and ODI are Cross-layer functions are services that are not tied to a interfaces between the media (layer 2) and the network give ...
Quantifying disincentives in P2P Systems
... different metrics: e.g., the number of files advertised by a user or the number of file-requests served by a user. First-time users without files to share should be allowed to download a small number of files so that they can enter the system and build their rating. The authors believe the second no ...
... different metrics: e.g., the number of files advertised by a user or the number of file-requests served by a user. First-time users without files to share should be allowed to download a small number of files so that they can enter the system and build their rating. The authors believe the second no ...
Lecture 1
... Trusted Computer System Evaluation Criteria Information Technology Security Evaluation Criteria ...
... Trusted Computer System Evaluation Criteria Information Technology Security Evaluation Criteria ...
The OSI Model: An Overview
... The physical layer is concerned with transmitting raw bits over a communication channel. The design issues have to do with making sure that when one side sends a 1 bit, it is received by the other side as a 1 bit, not as a 0 bit. Typical questions are how many volts should be used to represent a 1 a ...
... The physical layer is concerned with transmitting raw bits over a communication channel. The design issues have to do with making sure that when one side sends a 1 bit, it is received by the other side as a 1 bit, not as a 0 bit. Typical questions are how many volts should be used to represent a 1 a ...
Multimedia Networking
... Standards bodies (IETF and ITU) have been and continue to be busy at hammering out standards for this class of applications With the appropriate standards in place, independent companies are creating new products that interoperate with each other. 2 standards RTP and SIP are enjoying widespread impl ...
... Standards bodies (IETF and ITU) have been and continue to be busy at hammering out standards for this class of applications With the appropriate standards in place, independent companies are creating new products that interoperate with each other. 2 standards RTP and SIP are enjoying widespread impl ...
Windows 7 Firewall - IT352 : Network Security
... A device that filters packets either coming into or going out of a device Filtering can be based on IP, TCP, UDP and other criteria relating to a packet as well as authentication. Criteria contained in firewall rules. Firewall rule is similar to an access control list statement ...
... A device that filters packets either coming into or going out of a device Filtering can be based on IP, TCP, UDP and other criteria relating to a packet as well as authentication. Criteria contained in firewall rules. Firewall rule is similar to an access control list statement ...
overview of the project
... Intrusion detection systems have been studied for over 25 years. Still, they have limitations but have been very useful in detecting attacks. Basically, an IDS is concerned with the detection of hostile actions towards a computer system or network [2]. There are two main techniques to detect intrude ...
... Intrusion detection systems have been studied for over 25 years. Still, they have limitations but have been very useful in detecting attacks. Basically, an IDS is concerned with the detection of hostile actions towards a computer system or network [2]. There are two main techniques to detect intrude ...
lecture20
... The blue armies want to synchronize their attacks. However, their only communication medium is to send messengers on foot down into the valley, where they might be captured and the message lost (i.e., they have to use an unreliable communication channel). The question is: does a protocol exist that ...
... The blue armies want to synchronize their attacks. However, their only communication medium is to send messengers on foot down into the valley, where they might be captured and the message lost (i.e., they have to use an unreliable communication channel). The question is: does a protocol exist that ...
Redirection of call to MS at a visiting location
... Binding is checked, the CoA of the MS is encapsulated in the packet and forwarded to the network If CoA of the FA is used, then packet reaches FA, it decapsulates packet and passes to MS at the link layer In an internet environment, it is called Mobile IP After binding time, if MS still wants to hav ...
... Binding is checked, the CoA of the MS is encapsulated in the packet and forwarded to the network If CoA of the FA is used, then packet reaches FA, it decapsulates packet and passes to MS at the link layer In an internet environment, it is called Mobile IP After binding time, if MS still wants to hav ...
What is Internet?
... developed in 1995. IPv6 was standardized as RFC 2460 in 1998, and its deployment has been ongoing since the mid2000s. • IP addresses are binary numbers, but they are usually stored in text files and displayed in human-readable notations, such as 172.16.254.1 (for IPv4), and 2001:db8:0:1234:0:567:8:1 ...
... developed in 1995. IPv6 was standardized as RFC 2460 in 1998, and its deployment has been ongoing since the mid2000s. • IP addresses are binary numbers, but they are usually stored in text files and displayed in human-readable notations, such as 172.16.254.1 (for IPv4), and 2001:db8:0:1234:0:567:8:1 ...
Gateways - Sistel IMT 2010
... • Gateways B and D each have copies of the other's routing tables, as well. • These copies are transmitted at intervals so the gateways can maintain an up-to-date picture of the connections available through the other gateway. • The gateways use EGP to send the messages. (They would use GGP if they ...
... • Gateways B and D each have copies of the other's routing tables, as well. • These copies are transmitted at intervals so the gateways can maintain an up-to-date picture of the connections available through the other gateway. • The gateways use EGP to send the messages. (They would use GGP if they ...
ppt
... Demultiplexing: delivering the data in a transportlayer segment to the correct application process Multiplexing: gathering data at the source host from different application processes, enveloping data with header information to create segments and passing the segments to the network layer ...
... Demultiplexing: delivering the data in a transportlayer segment to the correct application process Multiplexing: gathering data at the source host from different application processes, enveloping data with header information to create segments and passing the segments to the network layer ...
pptx
... Discard invalid routes (e.g. private prefixes, unallocated prefixes, etc.) Enforce routing peering policies Protect internal services with route filtering Block denial-of-service attacks (e.g. limit number of prefixes allowed) ...
... Discard invalid routes (e.g. private prefixes, unallocated prefixes, etc.) Enforce routing peering policies Protect internal services with route filtering Block denial-of-service attacks (e.g. limit number of prefixes allowed) ...
Dealing with multiple clients
... Ethernet on unshielded twisted-pair cables (UTP), beginning with StarLAN and continuing with 10BASE-T, was designed for point-to-point links only and all termination was built into the device. This changed hubs from a specialist device used at the center of large networks to a device that every twi ...
... Ethernet on unshielded twisted-pair cables (UTP), beginning with StarLAN and continuing with 10BASE-T, was designed for point-to-point links only and all termination was built into the device. This changed hubs from a specialist device used at the center of large networks to a device that every twi ...
Nectar UCMP Solution Brochure
... analysis, as well as dependency trees that can map system interdependencies so you can zero-in on failed ...
... analysis, as well as dependency trees that can map system interdependencies so you can zero-in on failed ...
Network Security Fundamentals
... • Campus area network (CAN) - A network connecting any number of buildings in an office or university complex (also referred to as a campus wide area network). • Intranet - A “private” network that is accessible only to authorized users. Many large corporations host an intranet to facilitate informa ...
... • Campus area network (CAN) - A network connecting any number of buildings in an office or university complex (also referred to as a campus wide area network). • Intranet - A “private” network that is accessible only to authorized users. Many large corporations host an intranet to facilitate informa ...
Addressing - Suraj @ LUMS
... IEEE sets G/L = 0 when giving out the blocks of addresses Addresses with G/L = 1 can be used without paying IEEE but the network administrator is responsible to assign addresses such that there is no collision This leaves with 222 unique OUIs ...
... IEEE sets G/L = 0 when giving out the blocks of addresses Addresses with G/L = 1 can be used without paying IEEE but the network administrator is responsible to assign addresses such that there is no collision This leaves with 222 unique OUIs ...
ppt
... • If enough capacity, no congestion, no drops Keep layer (& try next layer) • If not enough capacity, congestion, drops Drop layer (& increase time to next retry) • What about impact on other receivers? ...
... • If enough capacity, no congestion, no drops Keep layer (& try next layer) • If not enough capacity, congestion, drops Drop layer (& increase time to next retry) • What about impact on other receivers? ...
Security and DoS
... a Trojan3 program installed on them. In order to create such a collection of hosts a way must be found to break into a large number of systems, and install a new program on these hosts. After installing the software it has to be able to contact some central location in order to receive commands and ...
... a Trojan3 program installed on them. In order to create such a collection of hosts a way must be found to break into a large number of systems, and install a new program on these hosts. After installing the software it has to be able to contact some central location in order to receive commands and ...