networks

Tags: Computers

Wireless networks

https://cse.sc.edu/~sur/papers/UbiG_MobiCom18.pdf

• https://gafferongames.com/
  • https://gafferongames.com/post/why_cant_i_send_udp_packets_from_a_browser/

Outages

• https://cybersquirrel1.com/

Tofu networks for supercomputing

• https://ieeexplore.ieee.org/document/6041538
• 16d sync for computers

linux Monitoring with Pcap

• https://isc.sans.edu/diary/pcap2curl+Turning+a+pcap+file+into+a+set+of+cURL+commands+for+replay/22900

Cache Line optimization for cpu

• https://lore.kernel.org/netdev/[email protected]/
• Up to 45% CPU performance increase by aligning cache lines

TCP Congestion Control

• slow start - begins transmission with a small congestion window and exponetnially increases it until a threshold is reached or packet loss is detected
• congestion avoidance - once a threshold is reached, TCP increases the congestion window linearly to probe for additional bandwidth
• fast retransmist and fast recovery - if packet loss is detected via duplicate acks, then it performs a fast retransmit
• Sequence number wrapping - TCP must handle the sequence number wrapping around

Nagle’s Algorithm

• 40ms delay in TCP
• Basically a buffer
• Note that TCP defaults haven’t really changed!
• Set TCP_NODELAY to prevent it

Route Map

• bgp route maps: https://www.routeviews.org/routeviews/index.php/map/