lecture02-swtching
... Source host has no way of knowing if the network is capable of delivering a packet or if the destination host is even up. Since packets are treated independently, it is possible to route around link and node failures. Since every packet must carry the full address of the destination, the overhead ...
... Source host has no way of knowing if the network is capable of delivering a packet or if the destination host is even up. Since packets are treated independently, it is possible to route around link and node failures. Since every packet must carry the full address of the destination, the overhead ...
Mobile VPNs For Next Generation GPRS And UMTS Networks
... GPRS and UMTS wireless packet data technologies provide the higher speed data rates and the support for standard mobile protocols necessary for secure MVPN service offerings for private corporate customers. By enabling secure mobile data access, these technologies allow wireless carriers to meet the ...
... GPRS and UMTS wireless packet data technologies provide the higher speed data rates and the support for standard mobile protocols necessary for secure MVPN service offerings for private corporate customers. By enabling secure mobile data access, these technologies allow wireless carriers to meet the ...
ppt
... • Every network has own Maximum Transmission Unit (MTU) • Largest IP datagram it can carry within its own packet frame • E.g., Ethernet is 1500 bytes ...
... • Every network has own Maximum Transmission Unit (MTU) • Largest IP datagram it can carry within its own packet frame • E.g., Ethernet is 1500 bytes ...
Firewalls
... network connections. Network design is also simplified as planners have more flexibility when creating an address plan. Deprivatization of a network requires renumbering of the existing network; the costs can be associated to the number of hosts that require conversion to the new addressing scheme. ...
... network connections. Network design is also simplified as planners have more flexibility when creating an address plan. Deprivatization of a network requires renumbering of the existing network; the costs can be associated to the number of hosts that require conversion to the new addressing scheme. ...
Fundamentals of Computer Networks ECE 478/578
... Limitations of the network layer Can drop messages (routers may incurr buffer overflow etc.) Can reorder messages Deliver duplicate copies of the same message Limit messages to finite size (eg. IP size is limited) ...
... Limitations of the network layer Can drop messages (routers may incurr buffer overflow etc.) Can reorder messages Deliver duplicate copies of the same message Limit messages to finite size (eg. IP size is limited) ...
2009125182350Y5
... each AS that is included in the path may use a different criteria for the metric • One system may use, internally, RIP, which defines hop count as the metric; another may use OSPF with minimum delay defined as the metric • The optimum path is the path that fits the organization • In the example figu ...
... each AS that is included in the path may use a different criteria for the metric • One system may use, internally, RIP, which defines hop count as the metric; another may use OSPF with minimum delay defined as the metric • The optimum path is the path that fits the organization • In the example figu ...
PowerPoint Sunusu
... No way! B gets no “revenue” for routing CBAW since neither W nor C are B’s customers B wants to force C to route to w via A B wants to route only to/from its customers! Network Layer ...
... No way! B gets no “revenue” for routing CBAW since neither W nor C are B’s customers B wants to force C to route to w via A B wants to route only to/from its customers! Network Layer ...
ppt
... how much overhead with TCP? 20 bytes of TCP 20 bytes of IP = 40 bytes + app layer overhead ...
... how much overhead with TCP? 20 bytes of TCP 20 bytes of IP = 40 bytes + app layer overhead ...
Remote Procedure Call Implementations
... – ICMP fragmentation required response if a router would have needed to fragment it – Used by TCP to learn path MTU and avoid fragmentation ...
... – ICMP fragmentation required response if a router would have needed to fragment it – Used by TCP to learn path MTU and avoid fragmentation ...
Security The big picture Some consequences Three types of threat
... • Very poor assumption to make when bad guys can control network! ...
... • Very poor assumption to make when bad guys can control network! ...
Data link layer (error detection/correction, multiple access protocols)
... Should B advertise to C the path BAW? No way! B gets no “revenue” for routing CBAW since neither W nor C are B’s customers B wants to force C to route to w via A B wants to route only to/from its customers! ...
... Should B advertise to C the path BAW? No way! B gets no “revenue” for routing CBAW since neither W nor C are B’s customers B wants to force C to route to w via A B wants to route only to/from its customers! ...
SenProbe: Path Capacity Estimation in Wireless Sensor Networks
... Capacity estimates along a multi-hop forwarding chain for CSMA-CA with ACK enabled wireless sensor network SenMetrics05 ...
... Capacity estimates along a multi-hop forwarding chain for CSMA-CA with ACK enabled wireless sensor network SenMetrics05 ...
and packet switching - Computer Science Division
... • Excessive congestion: packet delay and loss – protocols needed for reliable data transfer, congestion control • Q: How to provide circuit-like behavior? – bandwidth guarantees needed for audio/video apps – still an unsolved problem (chapter 6) ...
... • Excessive congestion: packet delay and loss – protocols needed for reliable data transfer, congestion control • Q: How to provide circuit-like behavior? – bandwidth guarantees needed for audio/video apps – still an unsolved problem (chapter 6) ...
ppt - Carnegie Mellon School of Computer Science
... Switches are connected by point-point links. Packets are forwarded hop-by-hop by the switches towards the destination. » Forwarding is based on the address ...
... Switches are connected by point-point links. Packets are forwarded hop-by-hop by the switches towards the destination. » Forwarding is based on the address ...
Logic Programming for Software-Defined Networks Naga Praveen Katta Jennifer Rexford David Walker
... a logically centralized controller machine manages a distributed set of switches. The controller is a general purpose machine capable of performing arbitrary computations, such as those computations that are necessary to infer network topology and make routing decisions. When the controller decides ...
... a logically centralized controller machine manages a distributed set of switches. The controller is a general purpose machine capable of performing arbitrary computations, such as those computations that are necessary to infer network topology and make routing decisions. When the controller decides ...
and packet switching - Computer Science Division
... • Excessive congestion: packet delay and loss – protocols needed for reliable data transfer, congestion control • Q: How to provide circuit-like behavior? – bandwidth guarantees needed for audio/video apps – still an unsolved problem (chapter 6) ...
... • Excessive congestion: packet delay and loss – protocols needed for reliable data transfer, congestion control • Q: How to provide circuit-like behavior? – bandwidth guarantees needed for audio/video apps – still an unsolved problem (chapter 6) ...
2003 - CIS
... looking up the destination address in their routing table. A routing table consists of a series of destination networks, the address of the local router that provides service to the destination network, and a cost associated with the route. The cost is used to determine the best route in the event t ...
... looking up the destination address in their routing table. A routing table consists of a series of destination networks, the address of the local router that provides service to the destination network, and a cost associated with the route. The cost is used to determine the best route in the event t ...