Moratuwa Campus Final Year BSC Engineering December
... the optical fibre The following 2 major factors play a vital role in designing the maximum capacity of an optical fibre • How far the digital multiplexing can be achieved • As at present , 488ns micro information of a bit pertaining to 2Mbps PCM stream will be reduced to 25ps when it goes through ST ...
... the optical fibre The following 2 major factors play a vital role in designing the maximum capacity of an optical fibre • How far the digital multiplexing can be achieved • As at present , 488ns micro information of a bit pertaining to 2Mbps PCM stream will be reduced to 25ps when it goes through ST ...
Towards an In-depth Understanding of Deep Packet Inspection
... Industrial Control Systems (ICS) are increasingly at risk and vulnerable to internal and external threats. These systems are integral to our nation’s critical infrastructures. Consequently, a successful cyberattack on one of these systems could present disastrous consequences to human life and prope ...
... Industrial Control Systems (ICS) are increasingly at risk and vulnerable to internal and external threats. These systems are integral to our nation’s critical infrastructures. Consequently, a successful cyberattack on one of these systems could present disastrous consequences to human life and prope ...
the network layer 1
... • No routes are worked out in advance Note that the type of services provided to transport layer and internal organization of the network are different concepts • E.g. Network Layer may provide a connectionoriented service to transport layer even when it internally uses datagrams to move the packets ...
... • No routes are worked out in advance Note that the type of services provided to transport layer and internal organization of the network are different concepts • E.g. Network Layer may provide a connectionoriented service to transport layer even when it internally uses datagrams to move the packets ...
paper
... recovery and path diversity with very low overhead. By network coding, we refer to the notion of performing coding operations on the contents of packets throughout a network. This notion is generally attributed to Ahlswede et al. [5], who showed the utility of the network coding for multicast. Their ...
... recovery and path diversity with very low overhead. By network coding, we refer to the notion of performing coding operations on the contents of packets throughout a network. This notion is generally attributed to Ahlswede et al. [5], who showed the utility of the network coding for multicast. Their ...
Technical Report
... (about the same as a T-3 line) to 2.48 Gbps. for Optical Carrier, used to specify the speed of fiber optic networks conforming to the SONET standard. The table shows the speeds for common OC levels. ...
... (about the same as a T-3 line) to 2.48 Gbps. for Optical Carrier, used to specify the speed of fiber optic networks conforming to the SONET standard. The table shows the speeds for common OC levels. ...
Lecture 2
... • Congestion Control: The server should send data as fast as possible, but not too fast • TCP provides these features (services), while UDP does not 3. Network layer (could be called the routing layer, but it isn’t) • The packets must find their way through the network. • Each packet has the IP addr ...
... • Congestion Control: The server should send data as fast as possible, but not too fast • TCP provides these features (services), while UDP does not 3. Network layer (could be called the routing layer, but it isn’t) • The packets must find their way through the network. • Each packet has the IP addr ...
ch 18
... Like FR, ATM uses two types of connections : PVC and SVC PVC : a permanent virtual-circuit is established between two endpoints by the network provider. The VPIs and VCIs are defined for the permanent connection and the values are entered for the tables of each switch. SVC : In a switched virtual-ci ...
... Like FR, ATM uses two types of connections : PVC and SVC PVC : a permanent virtual-circuit is established between two endpoints by the network provider. The VPIs and VCIs are defined for the permanent connection and the values are entered for the tables of each switch. SVC : In a switched virtual-ci ...
MultiNet: Connecting to Multiple IEEE 802.11 Networks Using a Single Wireless Card
... The virtualization of wireless adapters is implemented by the MultiNet Protocol Driver that is placed as an intermediate layer, between IP and the MAC. This driver exposes the wireless LAN media adapter as multiple always active virtual wireless LAN media adapters, one per desired network. The IP st ...
... The virtualization of wireless adapters is implemented by the MultiNet Protocol Driver that is placed as an intermediate layer, between IP and the MAC. This driver exposes the wireless LAN media adapter as multiple always active virtual wireless LAN media adapters, one per desired network. The IP st ...
Emergency Communication - dumbo-isif
... Captures the packets coming to the network interface. Shows the detail information of the packets captured and current ...
... Captures the packets coming to the network interface. Shows the detail information of the packets captured and current ...
STCP: A Generic Transport Layer Protocol for Wireless Sensor
... in a resource constrained sensor node. The overhead from headers can be quite large, particularly for small messages. Consider a simplex connection. TCP is designed to make the receiver side as simple as possible. It acknowledges the sender for reliability and for flow control mechanism. However, fo ...
... in a resource constrained sensor node. The overhead from headers can be quite large, particularly for small messages. Consider a simplex connection. TCP is designed to make the receiver side as simple as possible. It acknowledges the sender for reliability and for flow control mechanism. However, fo ...
2 Network topology
... common transmission medium which has exactly two endpoints (this is the 'bus', which is also commonly referred to as the backbone, or trunk) – all data that is transmitted between nodes in the network is transmitted over this common transmission medium and is able to be received by all nodes in the ...
... common transmission medium which has exactly two endpoints (this is the 'bus', which is also commonly referred to as the backbone, or trunk) – all data that is transmitted between nodes in the network is transmitted over this common transmission medium and is able to be received by all nodes in the ...
What is Leased Line
... University and Research networks before the Internet became widely available. ...
... University and Research networks before the Internet became widely available. ...
A Modular Network Layer for Sensornets
... the software is structured in today’s IP routers. However, this is too coarse-grained, as it enables little code reuse. Of the two components, the control plane is typically far more complex than the data plane, as it needs to implement non-trivial functionalities such as topology discovery and rout ...
... the software is structured in today’s IP routers. However, this is too coarse-grained, as it enables little code reuse. Of the two components, the control plane is typically far more complex than the data plane, as it needs to implement non-trivial functionalities such as topology discovery and rout ...
The Token Based Switch: per-packet access authorisation to optical shortcuts
... Section 2 discusses the TBS architecture. Section 3 explains implementation details. The system is evaluated in Section 4. Related work is discussed throughout the text and summarised in Section 5. Finally, conclusions are presented in Section 6. 2 Architecture At present, many techniques can be use ...
... Section 2 discusses the TBS architecture. Section 3 explains implementation details. The system is evaluated in Section 4. Related work is discussed throughout the text and summarised in Section 5. Finally, conclusions are presented in Section 6. 2 Architecture At present, many techniques can be use ...
William Stallings Data and Computer Communications
... • Each layer performs a subset of the required communication functions • Each layer relies on the next lower layer to perform more primitive functions • Each layer provides services to the next higher layer • Changes in one layer should not require changes in other layers ...
... • Each layer performs a subset of the required communication functions • Each layer relies on the next lower layer to perform more primitive functions • Each layer provides services to the next higher layer • Changes in one layer should not require changes in other layers ...
Chapter 1
... • The Internet is a good example of a connectionless, packet switched network. Each packet contains all of the addressing information required for successful packet delivery. • Frame Relay is an example of a connection-oriented packet switched network. Each packet does not require addressing informa ...
... • The Internet is a good example of a connectionless, packet switched network. Each packet contains all of the addressing information required for successful packet delivery. • Frame Relay is an example of a connection-oriented packet switched network. Each packet does not require addressing informa ...
Packet Switching, ATM, switch Fabric
... Typically wait full RTT for connection setup before sending first data packet. While the connection request contains the full address for destination, each data packet contains only a small identifier, making the per-packet header overhead small. If a switch or a link in a connection fails, the conn ...
... Typically wait full RTT for connection setup before sending first data packet. While the connection request contains the full address for destination, each data packet contains only a small identifier, making the per-packet header overhead small. If a switch or a link in a connection fails, the conn ...
Chapter 1 Lecture Slides - Classes
... Packet switching versus circuit switching Packet switching allows more users to use network! 3 Mb/s link ...
... Packet switching versus circuit switching Packet switching allows more users to use network! 3 Mb/s link ...
Router Anatomy - Institute for Systems Research
... This can be done with very sophisticated multi-level hierarchy of different memory technology, interleaving memory banks. This requires prohibitive cost, design complexity and power consumption. Hence typical processor pipeline end-up being often empty, which reduces the system throughput. N ...
... This can be done with very sophisticated multi-level hierarchy of different memory technology, interleaving memory banks. This requires prohibitive cost, design complexity and power consumption. Hence typical processor pipeline end-up being often empty, which reduces the system throughput. N ...
Building a trustworthy, secure, and private
... hosts. Suspicious hosts can be released from the blacklist. • The destination host will broadcast an INVALID packet with its signature when it finds that the system is under attack on sequence. The packet carries the host’s identification, current sequence, new sequence, and its own blacklist. • Eve ...
... hosts. Suspicious hosts can be released from the blacklist. • The destination host will broadcast an INVALID packet with its signature when it finds that the system is under attack on sequence. The packet carries the host’s identification, current sequence, new sequence, and its own blacklist. • Eve ...
3rd Edition, Chapter 5
... today: ATM, MPLS … “invisible” at internetwork layer. Looks like a link layer technology to IP! ...
... today: ATM, MPLS … “invisible” at internetwork layer. Looks like a link layer technology to IP! ...
Packet switching
Packet switching is a digital networking communications method that groups all transmitted data into suitably sized blocks, called packets, which are transmitted via a medium that may be shared by multiple simultaneous communication sessions. Packet switching increases network efficiency, robustness and enables technological convergence of many applications operating on the same network.Packets are composed of a header and payload. Information in the header is used by networking hardware to direct the packet to its destination where the payload is extracted and used by application software.Starting in the late 1950s, American computer scientist Paul Baran developed the concept Distributed Adaptive Message Block Switching with the goal to provide a fault-tolerant, efficient routing method for telecommunication messages as part of a research program at the RAND Corporation, funded by the US Department of Defense. This concept contrasted and contradicted the heretofore established principles of pre-allocation of network bandwidth, largely fortified by the development of telecommunications in the Bell System. The new concept found little resonance among network implementers until the independent work of Donald Davies at the National Physical Laboratory (United Kingdom) (NPL) in the late 1960s. Davies is credited with coining the modern name packet switching and inspiring numerous packet switching networks in Europe in the decade following, including the incorporation of the concept in the early ARPANET in the United States.