Infrastructure Issues for a Data Warehouse
... The speed of processing a given retrieval is primarily governed by the number of disk accesses required to execute it. Data is transferred to and from the disk in buffer sized units. On large systems these buffers (blocks) can be set by the code; on PC’s the buffer sizes ...
... The speed of processing a given retrieval is primarily governed by the number of disk accesses required to execute it. Data is transferred to and from the disk in buffer sized units. On large systems these buffers (blocks) can be set by the code; on PC’s the buffer sizes ...
Chapter 11 n` 12
... • Sender starts with cwnd = 1 or 2 MSS • For each acknowledged segment, cwnd is increased by 1 MSS. cwnd is increased in this manner until a threshold (called “ssthresh - slow start threshold”) is reached • In most implementations, “ssthresh” is 65535 bytes • Increase of cwnd in the slow-start phase ...
... • Sender starts with cwnd = 1 or 2 MSS • For each acknowledged segment, cwnd is increased by 1 MSS. cwnd is increased in this manner until a threshold (called “ssthresh - slow start threshold”) is reached • In most implementations, “ssthresh” is 65535 bytes • Increase of cwnd in the slow-start phase ...
Mesh Summit Multiradio
... All hops on a path on the same channel interfere – Add ETTs of hops that are on the same channel – Path throughput is dominated by the maximum of these sums ...
... All hops on a path on the same channel interfere – Add ETTs of hops that are on the same channel – Path throughput is dominated by the maximum of these sums ...
Differentiated Services
... • SLAs will be inherently limited to the service provider’s network - multi-provider transit SLAs may follow, or they may not • Most useful for customer-operated VPN environments, or for common community of interest distributed environments (e.g. dealer networks) where the common SLA can be translat ...
... • SLAs will be inherently limited to the service provider’s network - multi-provider transit SLAs may follow, or they may not • Most useful for customer-operated VPN environments, or for common community of interest distributed environments (e.g. dealer networks) where the common SLA can be translat ...
powerpoint slides - TAMU Computer Science Faculty Pages
... • Guaranteed QoS is independent from connection establishment protocol or flow identification mechanism – RSVP – manual configuration – SNMP • However: Guaranteed QoS only possible if every service element supports in the path supports it. • Guaranteed service guarantees: – End-to-end delays – Queue ...
... • Guaranteed QoS is independent from connection establishment protocol or flow identification mechanism – RSVP – manual configuration – SNMP • However: Guaranteed QoS only possible if every service element supports in the path supports it. • Guaranteed service guarantees: – End-to-end delays – Queue ...
The Network Layer - Computer Science
... connects to established port on server. Server gets a return address (mapped port), so it can respond. • NAT host doesn’t know its mapped port, so it can’t advertise its address/port to the world to act as a server. • UPnP protocol: inner host asks NAT gateway for a specific port, then it advertises ...
... connects to established port on server. Server gets a return address (mapped port), so it can respond. • NAT host doesn’t know its mapped port, so it can’t advertise its address/port to the world to act as a server. • UPnP protocol: inner host asks NAT gateway for a specific port, then it advertises ...
Implementing iptables using a programmable
... Our current implementation supports all the iptables functions excluding those that perform operations on the packet’s content2 . When the smart NIC’s data plane is used, the implemented functions can handle traffic at 40Gbps (NetFPGA SUME’s line rate) with practically no server’s CPU involvement. H ...
... Our current implementation supports all the iptables functions excluding those that perform operations on the packet’s content2 . When the smart NIC’s data plane is used, the implemented functions can handle traffic at 40Gbps (NetFPGA SUME’s line rate) with practically no server’s CPU involvement. H ...
ch5-6(link).
... Assigns a different code to each node Allows different nodes to transmit simultaneously and yet have their respective receivers correctly receive a sender’s encoded data bits in spite of interfering transmissions by other node. Partitions the codespace Issues: 1. codes must be carefully chosen, 2. t ...
... Assigns a different code to each node Allows different nodes to transmit simultaneously and yet have their respective receivers correctly receive a sender’s encoded data bits in spite of interfering transmissions by other node. Partitions the codespace Issues: 1. codes must be carefully chosen, 2. t ...
Firewall Categorization Methods
... First generation: static packet filtering firewalls Second generation: application-level firewalls or proxy servers Third generation: stateful inspection firewalls Fourth generation: dynamic packet filtering firewalls; allow only packets with particular source, destination and port addresses to ente ...
... First generation: static packet filtering firewalls Second generation: application-level firewalls or proxy servers Third generation: stateful inspection firewalls Fourth generation: dynamic packet filtering firewalls; allow only packets with particular source, destination and port addresses to ente ...
Internet Protocols - NYU Computer Science Department
... Delivered out of order Either side can crash Either side can reboot Need to avoid duplicate ‘‘shutdown’’ message from affecting later connection ...
... Delivered out of order Either side can crash Either side can reboot Need to avoid duplicate ‘‘shutdown’’ message from affecting later connection ...
switching - WordPress.com
... One packet also contains details of how many packets should be arriving so that the recipient computer knows if one packet has failed to turn up. If a packet fails to arrive, the recipient computer sends a message back to the computer which originally sent the data, asking for the missing packet t ...
... One packet also contains details of how many packets should be arriving so that the recipient computer knows if one packet has failed to turn up. If a packet fails to arrive, the recipient computer sends a message back to the computer which originally sent the data, asking for the missing packet t ...
Congestion Control
... • Provide connectionless network-layer transport through datagram networks • Packets are sent independently of each other – Each packet has full set of control information • Sent using destination address ...
... • Provide connectionless network-layer transport through datagram networks • Packets are sent independently of each other – Each packet has full set of control information • Sent using destination address ...
Congestion
... loss indicated by timeout: cwnd set to 1 MSS; window then grows exponentially (as in slow start) to threshold, then grows linearly loss indicated by 3 duplicate ACKs: TCP RENO dup ACKs indicate network capable of delivering ...
... loss indicated by timeout: cwnd set to 1 MSS; window then grows exponentially (as in slow start) to threshold, then grows linearly loss indicated by 3 duplicate ACKs: TCP RENO dup ACKs indicate network capable of delivering ...
Database Client/Server Apps - NYU Stern School of Business
... Errors sometimes detected, but no recovery Horizontal parity used to detect single character errors ...
... Errors sometimes detected, but no recovery Horizontal parity used to detect single character errors ...
Intraplex® IP Link
... IP Link 100: XLR for analog L&R and digital AES/EBU inputs and outputs IP Link 200: XLR for channel 1 analog L&R and digital AES/EBU inputs and outputs, RJ-45 connectors with StudioHub cabling format for channel 2 audio input/output RS-232 data: DB-9 ...
... IP Link 100: XLR for analog L&R and digital AES/EBU inputs and outputs IP Link 200: XLR for channel 1 analog L&R and digital AES/EBU inputs and outputs, RJ-45 connectors with StudioHub cabling format for channel 2 audio input/output RS-232 data: DB-9 ...
Network Topologies
... If computer switched off or faulty should be somehow for data still to be passed around the loop – if not whole network can be fail as traffic only in one direction, Each device will re-broadcast the data packet so signal is stronger and can cover larger area than some topologies, No hubs / switches ...
... If computer switched off or faulty should be somehow for data still to be passed around the loop – if not whole network can be fail as traffic only in one direction, Each device will re-broadcast the data packet so signal is stronger and can cover larger area than some topologies, No hubs / switches ...
Security Problems in the TCP/IP Protocol Suite
... One that filters packets based on source or destination address only, not on the route Would have to make RIP more skeptical of the routes that the router is willing to accept ...
... One that filters packets based on source or destination address only, not on the route Would have to make RIP more skeptical of the routes that the router is willing to accept ...
Chap5
... • Reliable delivery between adjacent nodes – we learned how to do this already (chapter 3)! – seldom used on low bit error link (fiber, some twisted pair) – wireless links: high error rates • Q: why both link-level and end-end reliability? ...
... • Reliable delivery between adjacent nodes – we learned how to do this already (chapter 3)! – seldom used on low bit error link (fiber, some twisted pair) – wireless links: high error rates • Q: why both link-level and end-end reliability? ...
NETWORK TOPOLOGIES
... The drawback to this type of topology is that a single malfunctioning workstation can disable the whole network To make sure all the information is sent the receiving PC sends the token back to the sending PC after it has received all the data If the sending PC is finished sending it passes th ...
... The drawback to this type of topology is that a single malfunctioning workstation can disable the whole network To make sure all the information is sent the receiving PC sends the token back to the sending PC after it has received all the data If the sending PC is finished sending it passes th ...
Voice Over IP
... A media gateway provides translation of protocols for call setup and release, conversion of media formats between different networks: Transfer of information between H.323 and SIP networks on an IP Network Translation between transmission formats and communication signals and procedures (e.g. ...
... A media gateway provides translation of protocols for call setup and release, conversion of media formats between different networks: Transfer of information between H.323 and SIP networks on an IP Network Translation between transmission formats and communication signals and procedures (e.g. ...
Wireless data transfer – GSM
... UMTS requires new base stations and new frequency allocations • UMTS network is very similar to GSM • The most common form of UMTS uses WCDMA but also TD-CDMA and TD-SCDMA ...
... UMTS requires new base stations and new frequency allocations • UMTS network is very similar to GSM • The most common form of UMTS uses WCDMA but also TD-CDMA and TD-SCDMA ...
Chapter 02 - Communicating Over The Network
... size of PDU that each medium can transport Maximum Transmission Unit (MTU). Part of the control communication between the Data Link layer and the Network layer is the establishment of a maximum size for the packet. The Data Link layer passes the MTU upward to the Network layer. The Network layer the ...
... size of PDU that each medium can transport Maximum Transmission Unit (MTU). Part of the control communication between the Data Link layer and the Network layer is the establishment of a maximum size for the packet. The Data Link layer passes the MTU upward to the Network layer. The Network layer the ...
OptiSwitch® MR2226N-2C L2/4 Managed Switch
... ACLs restrict access to sensitive portions of the network by denying packets based on source and destination MAC addresses, IP addresses, or TCP/UDP ports. ACL lookups are done in hardware; therefore, forwarding performance is not compromised when implementing ACL-based security in the network. The ...
... ACLs restrict access to sensitive portions of the network by denying packets based on source and destination MAC addresses, IP addresses, or TCP/UDP ports. ACL lookups are done in hardware; therefore, forwarding performance is not compromised when implementing ACL-based security in the network. The ...