Class 13 - Oct. 16 - Circuit Switching
... Routing • Requires balancing efficiency and resiliency • Traditional circuit-switched model is hierarchical, sometimes supplemented with peer-to-peer trunks • Newer circuit-switched networks are dynamically routed: all nodes are peer-topeer, making routing more complex CSCI 465 Data Communications & ...
... Routing • Requires balancing efficiency and resiliency • Traditional circuit-switched model is hierarchical, sometimes supplemented with peer-to-peer trunks • Newer circuit-switched networks are dynamically routed: all nodes are peer-topeer, making routing more complex CSCI 465 Data Communications & ...
Measuring Next-Generation Networks: HOPI
... • As you glue together different technologies (L2+L1+MPLS+…) if there is a problem, finding that problem will be harder; • If you don’t use SONET at L1, indications from network are potentially fewer (or different); GFP operations and monitoring functions? ...
... • As you glue together different technologies (L2+L1+MPLS+…) if there is a problem, finding that problem will be harder; • If you don’t use SONET at L1, indications from network are potentially fewer (or different); GFP operations and monitoring functions? ...
A method for IP multicast performance monitoring
... fulfills the requirements of the previous slide • In addition it is: - vendor/technology independent - with minimum impact on routers ...
... fulfills the requirements of the previous slide • In addition it is: - vendor/technology independent - with minimum impact on routers ...
Introduction - Massey University
... A factor in the delay of a store-andforward packet-switching system is how long it takes to store and forward a packet through a switch. If switching time is 10 µsec, is this likely to be a major factor in the response of a client-server system where the client is in Adelaide, Australia and the serv ...
... A factor in the delay of a store-andforward packet-switching system is how long it takes to store and forward a packet through a switch. If switching time is 10 µsec, is this likely to be a major factor in the response of a client-server system where the client is in Adelaide, Australia and the serv ...
CSE331
... identifies a single network that is part of the larger Internet. • All hosts and routers that share the same network part of their address are connected to the same physical network. • Routers can exchange packets on any network they’re attached to. CSE331 Fall 2002 ...
... identifies a single network that is part of the larger Internet. • All hosts and routers that share the same network part of their address are connected to the same physical network. • Routers can exchange packets on any network they’re attached to. CSE331 Fall 2002 ...
Switched Network
... network and is referred to as a virtual circuit. Each packet contains a virtual circuit identifier as well as data. Each node on the pre-established route knows where to direct such packets; no routing decisions are required. At any time, each station can have more than one virtual circuit to any ot ...
... network and is referred to as a virtual circuit. Each packet contains a virtual circuit identifier as well as data. Each node on the pre-established route knows where to direct such packets; no routing decisions are required. At any time, each station can have more than one virtual circuit to any ot ...
slides 2
... – Didn’t used to be cost-effective – Now, easy to make high-speed switches and routers that can forward packets from a sender to a receiver. ...
... – Didn’t used to be cost-effective – Now, easy to make high-speed switches and routers that can forward packets from a sender to a receiver. ...
Things we didn`t get to talk about
... • Hypervisor encapsulates the frame in a UDP datagram – VXLAN: Virtual Extensible LAN – Layer 2 over Layer 3 encapsulation ...
... • Hypervisor encapsulates the frame in a UDP datagram – VXLAN: Virtual Extensible LAN – Layer 2 over Layer 3 encapsulation ...
Ensuring QoS in Your VoIP Development
... - Automated scoring process using an algorithm that enables computer-derived scores to correlate to MOS scores. - Designed for circuit-switched network and does not take into effect important parameters such as jitter and packet loss, which affect voice quality on a VOIP network adversely. ...
... - Automated scoring process using an algorithm that enables computer-derived scores to correlate to MOS scores. - Designed for circuit-switched network and does not take into effect important parameters such as jitter and packet loss, which affect voice quality on a VOIP network adversely. ...
Part I: Introduction
... routers the fundamental question: how is data transferred through net? circuit switching: dedicated circuit per call: telephone net packet-switching: data sent thru net in discrete “chunks” ...
... routers the fundamental question: how is data transferred through net? circuit switching: dedicated circuit per call: telephone net packet-switching: data sent thru net in discrete “chunks” ...
Specialized Packet Forwarding Hardware
... “If header = y, overwrite header with z, send to ports 5,6” “If header = ?, send to me” ...
... “If header = y, overwrite header with z, send to ports 5,6” “If header = ?, send to me” ...
Lecture No. 7
... ATM designers also chose cells to meet the need for speed. Since it was designed to handle arbitrarily large numbers of users, each of which could be willing to pay for high throughput. ATM is designed to work on fiber (but can be used with twisted pair). A typical port on an ATM switch operates at ...
... ATM designers also chose cells to meet the need for speed. Since it was designed to handle arbitrarily large numbers of users, each of which could be willing to pay for high throughput. ATM is designed to work on fiber (but can be used with twisted pair). A typical port on an ATM switch operates at ...
ppt
... opcodes in the byte-code language (e.g., IP address lookup, interface enumeration, flow queue management, or congestion status information). Dynamic router services tailored to networking tasks with a focus on control-plane functionality (e.g., AQM, scheduling, policing). ...
... opcodes in the byte-code language (e.g., IP address lookup, interface enumeration, flow queue management, or congestion status information). Dynamic router services tailored to networking tasks with a focus on control-plane functionality (e.g., AQM, scheduling, policing). ...
ppt
... Packet Delay 1. The processing delay [PROC] between the time the packet is correctly received at the head node of the link and the time the packet is assigned to an outgoing link queue for transmission. 2. The queueing delay [QD] between the time the packet is assigned to a queue for transmission a ...
... Packet Delay 1. The processing delay [PROC] between the time the packet is correctly received at the head node of the link and the time the packet is assigned to an outgoing link queue for transmission. 2. The queueing delay [QD] between the time the packet is assigned to a queue for transmission a ...
Chapter 14
... – Virtually every computer has the ability to send and receive by using an asynchronous data link protocol. Because most computers support the asynchronous data link protocol, it is sometimes used to link a microcomputer to a host. Usually, a microcomputer attached to a host asynchronously operates ...
... – Virtually every computer has the ability to send and receive by using an asynchronous data link protocol. Because most computers support the asynchronous data link protocol, it is sometimes used to link a microcomputer to a host. Usually, a microcomputer attached to a host asynchronously operates ...
The Internet and Its Uses
... Connectionless systems, such as the Internet, carry full addressing information in each packet. Connection-oriented systems predetermine the route for a packet, and each packet only has to carry an identifier. I In the case of Frame Relay, these are called Data Link Connection Identifiers. T ...
... Connectionless systems, such as the Internet, carry full addressing information in each packet. Connection-oriented systems predetermine the route for a packet, and each packet only has to carry an identifier. I In the case of Frame Relay, these are called Data Link Connection Identifiers. T ...
Document
... Message Switching » Similar to packet switching except using messages which are stored into the disk Disadvantage: a long message may occupy the route for a long time TELE202 Lecture 5 Packet switching in WAN ...
... Message Switching » Similar to packet switching except using messages which are stored into the disk Disadvantage: a long message may occupy the route for a long time TELE202 Lecture 5 Packet switching in WAN ...
pptx - NOISE
... "A number of Covad customers went out from 5pm today due to, supposedly, a DDOS (distributed denial of service attack) on a key Level3 data center, which later was described as a route leak (misconfiguration).” -- dslreports.com, February 23, 2004 ...
... "A number of Covad customers went out from 5pm today due to, supposedly, a DDOS (distributed denial of service attack) on a key Level3 data center, which later was described as a route leak (misconfiguration).” -- dslreports.com, February 23, 2004 ...
File
... CCNA2: Routing Protocols and Concepts (70 hrs) CCNA3: LAN Switching and Wireless (70 hrs) CCNA4: Accessing the WAN (70 hrs) ...
... CCNA2: Routing Protocols and Concepts (70 hrs) CCNA3: LAN Switching and Wireless (70 hrs) CCNA4: Accessing the WAN (70 hrs) ...
Detection of Vampire Attack in Wireless Adhoc Network
... network capability that communicate with each other with decentralized administrator [1]. These networks are basically a kind of wireless communication networks with mobility. Therefore, in such network major issues are found that is security and performance. A variety of routing algorithm exists an ...
... network capability that communicate with each other with decentralized administrator [1]. These networks are basically a kind of wireless communication networks with mobility. Therefore, in such network major issues are found that is security and performance. A variety of routing algorithm exists an ...
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.