Advances_in_Networking_Part_1.md

WWDC 2017

Table of Contents

• Advance in Networking, Part 1 *
  • Explicit congestion notification (ECN)
    • iPv6
    • NAT64
  • Network Extension Framework
    • NEHotspotConfiguration:
    • NEDNSProxyProvider;
  • Multipath Protocols For Mobile devices:
    • Multipath TCP: (new)
      • Public app in iOS 11 to enable MPTCP
        • Handover mode
        • Interactive mode (upcoming beta):
        • Aggregation mode (upcoming beta):

Advance in Networking, Part 1 - Wednesday

Session video and resources: https://developer.apple.com/videos/play/wwdc2017/707/

Explicit congestion notification (ECN)

Bottleneck - packet transfer is cancelled:

• Mark packet as congestion experiences.. <-less destructive

  • Reduce Retransmissions
  • Reduce delay
  • Improve UX

• Smart queue management

iPv6

• Networking stack changes
• New network extension facilities
• Multipath protocols

NAT64

• for providers which does not support iPv6

NEW: TCP/IPv6 in User Space not in Kernel space

Network Extension Framework

NEHotspotConfiguration:

• Setting networks from the app itself..
• Can be temporary or permanent (You can even set only when this app is used -network settings-)

NEDNSProxyProvider;

• DNS over TLS/HTTP

Multipath Protocols For Mobile devices:

Wifi-Assist since iOS 9

Multipath TCP: (new)

When you leave home or on poor wifi - > wifi to Cellular link..

• Improve reliability and UX..
• Switch between smoothly

Public app in iOS 11 to enable MPTCP

Handover mode

• Wifi to cellular vice versa.
• Minimize cell usage, reliable for persistent connection)
• Use it for important call which do not use so much data (avoid cellular data over usage)

Interactive mode (upcoming beta):

Low latency for low-volume interactive flows.. (wifi-cellular switch)

Aggregation mode (upcoming beta):

It is just a developer mode: (not for customer’s device)

• Combines link capabilities
• Available through developer settings