Pres3EvolutionOfInternet - University of Scranton: Computing
... and fastest spreading DDoS attacks ever. Taking roughly 10 minutes to spread worldwide, the worm took down 5 of the 13 DNS root servers along with tens of thousands of other servers, and impacted a multitude of systems ranging from (bank) ATM systems to air traffic control to emergency (911) systems ...
... and fastest spreading DDoS attacks ever. Taking roughly 10 minutes to spread worldwide, the worm took down 5 of the 13 DNS root servers along with tens of thousands of other servers, and impacted a multitude of systems ranging from (bank) ATM systems to air traffic control to emergency (911) systems ...
3rd Edition: Chapter 3
... start timer if not already running (think of timer as for oldest unacked segment) ...
... start timer if not already running (think of timer as for oldest unacked segment) ...
Midterm 2008
... communication network. Each packet transmitted by A crosses two intermediate nodes before reaching B. Assume an ideal scenario where the physical channel supports error free communications. Given that the packet size should be FIXED and the total length of headers is 200 bytes, the transmission rate ...
... communication network. Each packet transmitted by A crosses two intermediate nodes before reaching B. Assume an ideal scenario where the physical channel supports error free communications. Given that the packet size should be FIXED and the total length of headers is 200 bytes, the transmission rate ...
7: TCP - unimi.it
... Window like for GBN or selective repeat, but window size not fixed – variable based on receiver feedback Acknowledgment Field (32 bit) The acknowledgement field contains the next sequence number it is expecting thus implicitly acknowledging all previous segments. Cumulative acks not individu ...
... Window like for GBN or selective repeat, but window size not fixed – variable based on receiver feedback Acknowledgment Field (32 bit) The acknowledgement field contains the next sequence number it is expecting thus implicitly acknowledging all previous segments. Cumulative acks not individu ...
Measurement and Analysis of TCP Throughput Collapse in Cluster-based Storage Systems
... in cluster-based storage systems, and TCP’s loss recovery mechanisms. Briefly put, data striping couples the behavior of multiple storage servers, so the system is limited by the request completion time of the slowest storage node [7]. Small Ethernet buffers are exhausted by a concurrent flood of traf ...
... in cluster-based storage systems, and TCP’s loss recovery mechanisms. Briefly put, data striping couples the behavior of multiple storage servers, so the system is limited by the request completion time of the slowest storage node [7]. Small Ethernet buffers are exhausted by a concurrent flood of traf ...
Re-ECN - Bob Briscoe
... manage evolution of new congestion control, even for liberal → conservative flows nets that allow their users to cause congestion in other nets, can be held accountable ...
... manage evolution of new congestion control, even for liberal → conservative flows nets that allow their users to cause congestion in other nets, can be held accountable ...
ch03
... • Fields in the PPP header and trailer include – Flag – Protocol identifier – Frame Check Sequence (FCS) ...
... • Fields in the PPP header and trailer include – Flag – Protocol identifier – Frame Check Sequence (FCS) ...
Three Challenges in Reliable Data Transport over
... • Functions Efficient loss recovery Robust congestion and flow control ...
... • Functions Efficient loss recovery Robust congestion and flow control ...
Chapter 3: Network Protocols and Communications
... addresses, indicate the network and host address of the source and destination. The network portion of the address will be the same; only the host or device portion of the address will be different. When the sender and receiver of the IP packet are on the same network, the data link frame is sent di ...
... addresses, indicate the network and host address of the source and destination. The network portion of the address will be the same; only the host or device portion of the address will be different. When the sender and receiver of the IP packet are on the same network, the data link frame is sent di ...
投影片 1
... dl_buf_handle //The current buffer containing SOP dl_eop_buf_handle // for large packets, the buffer containing EOP. input port // port from which the packet is rxed ...
... dl_buf_handle //The current buffer containing SOP dl_eop_buf_handle // for large packets, the buffer containing EOP. input port // port from which the packet is rxed ...
The Power of Modern Information Systems
... •Sockets - is a name given to the package of subroutines that provide access to TCP/IP on most systems. ...
... •Sockets - is a name given to the package of subroutines that provide access to TCP/IP on most systems. ...
IST 201 - York Technical College
... is not in the same network, the router can be configured to provide it’s own MAC address if the destination host address is not in the MAC table. • This process allows the message to leave and re-enter the network via the router. ...
... is not in the same network, the router can be configured to provide it’s own MAC address if the destination host address is not in the MAC table. • This process allows the message to leave and re-enter the network via the router. ...
ppt - Carnegie Mellon School of Computer Science
... As data is moving down the protocol stack, each protocol is adding layer-specific control information. ...
... As data is moving down the protocol stack, each protocol is adding layer-specific control information. ...
2. (a) What universal set of communication services is provided by
... network. At first, it may appear that TCP is suitable because of its connection orientation. However the acknowledgment and retransmission mechanisms in TCP introduce too much delay in the transfer of packets, and so UDP is the preferred approach to transferring a real-time voice stream across the n ...
... network. At first, it may appear that TCP is suitable because of its connection orientation. However the acknowledgment and retransmission mechanisms in TCP introduce too much delay in the transfer of packets, and so UDP is the preferred approach to transferring a real-time voice stream across the n ...
CSE 524: Lecture 17
... – NIDS could see a different stream of packets than host – Protocol implementation ambiguities • Different protocol stacks have different behavior ...
... – NIDS could see a different stream of packets than host – Protocol implementation ambiguities • Different protocol stacks have different behavior ...
Improving VPN Performance over Multiple Access Links Larry Roberts
... In networks where packet losses are frequent (e.g., wireless LANs) the sender receiving rate feedback can distinguish between loss due to congestion and loss due to link impairments and consequently not reduce rates in response to any loss event. Further, if rates are reduced by congestion then the ...
... In networks where packet losses are frequent (e.g., wireless LANs) the sender receiving rate feedback can distinguish between loss due to congestion and loss due to link impairments and consequently not reduce rates in response to any loss event. Further, if rates are reduced by congestion then the ...
DoS
... • An overloaded server would result in 3 SYNs to a FIN or SYN-ACK – Because clients would retransmit the SYN ...
... • An overloaded server would result in 3 SYNs to a FIN or SYN-ACK – Because clients would retransmit the SYN ...
No Slide Title - comp
... – The upper three layers were not generally agreed upon. – A very complex protocol architecture; a large number of layers implies inefficiency. – Significant implementation effort – TCP/IP was readily available then. ...
... – The upper three layers were not generally agreed upon. – A very complex protocol architecture; a large number of layers implies inefficiency. – Significant implementation effort – TCP/IP was readily available then. ...
Chapter 4 Review Questions
... protocol stack. If the LAN broadcast address is used, then C’s adapter will both process the frames and pass the datagrams up the protocol stack. 10. An ARP query is sent in a broadcast frame because the querying host does not which adapter address corresponds to the IP address in question. For the ...
... protocol stack. If the LAN broadcast address is used, then C’s adapter will both process the frames and pass the datagrams up the protocol stack. 10. An ARP query is sent in a broadcast frame because the querying host does not which adapter address corresponds to the IP address in question. For the ...
Transport Layer
... informs sender of (dynamically changing) amount of free buffer space rcvr window size field in TCP segment sender: amount of transmitted, unACKed data less than most recently-receiver rcvr window size ...
... informs sender of (dynamically changing) amount of free buffer space rcvr window size field in TCP segment sender: amount of transmitted, unACKed data less than most recently-receiver rcvr window size ...